417 results on '"Beddows, David"'
Search Results
2. PM10-bound trace elements in pan-European urban atmosphere
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Liu, Xiansheng, Zhang, Xun, Wang, Tao, Jin, Bowen, Wu, Lijie, Lara, Rosa, Monge, Marta, Reche, Cristina, Jaffrezo, Jean-Luc, Uzu, Gaelle, Dominutti, Pamela, Darfeuil, Sophie, Favez, Olivier, Conil, Sébastien, Marchand, Nicolas, Castillo, Sonia, de la Rosa, Jesús D., Stuart, Grange, Eleftheriadis, Konstantinos, Diapouli, Evangelia, Gini, Maria I., Nava, Silvia, Alves, Célia, Wang, Xianxia, Xu, Yiming, Green, David C., Beddows, David C.S., Harrison, Roy M., Alastuey, Andrés, and Querol, Xavier
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- 2024
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3. Towards comprehensive air quality management using low-cost sensors for pollution source apportionment
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Bousiotis, Dimitrios, Allison, Gordon, Beddows, David C. S., Harrison, Roy M., and Pope, Francis D.
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- 2023
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4. Inter-annual trends of ultrafine particles in urban Europe
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Garcia-Marlès, Meritxell, Lara, Rosa, Reche, Cristina, Pérez, Noemí, Tobías, Aurelio, Savadkoohi, Marjan, Beddows, David, Salma, Imre, Vörösmarty, Máté, Weidinger, Tamás, Hueglin, Christoph, Mihalopoulos, Nikos, Grivas, Georgios, Kalkavouras, Panayiotis, Ondráček, Jakub, Zíková, Nadĕžda, Niemi, Jarkko V., Manninen, Hanna E., Green, David C., Tremper, Anja H., Norman, Michael, Vratolis, Stergios, Eleftheriadis, Konstantinos, Gómez-Moreno, Francisco J., Alonso-Blanco, Elisabeth, Wiedensohler, Alfred, Weinhold, Kay, Merkel, Maik, Bastian, Susanne, Hoffmann, Barbara, Altug, Hicran, Petit, Jean-Eudes, Favez, Olivier, Dos Santos, Sebastiao Martins, Putaud, Jean-Philippe, Dinoi, Adelaide, Contini, Daniele, Timonen, Hilkka, Lampilahti, Janne, Petäjä, Tuukka, Pandolfi, Marco, Hopke, Philip K., Harrison, Roy M., Alastuey, Andrés, and Querol, Xavier
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- 2024
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5. Ambient air particulate total lung deposited surface area (LDSA) levels in urban Europe
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Liu, Xiansheng, Hadiatullah, Hadiatullah, Zhang, Xun, Trechera, Pedro, Savadkoohi, Marjan, Garcia-Marlès, Meritxell, Reche, Cristina, Pérez, Noemí, Beddows, David C.S., Salma, Imre, Thén, Wanda, Kalkavouras, Panayiotis, Mihalopoulos, Nikos, Hueglin, Christoph, Green, David C., Tremper, Anja H., Chazeau, Benjamin, Gille, Grégory, Marchand, Nicolas, Niemi, Jarkko V., Manninen, Hanna E., Portin, Harri, Zikova, Nadezda, Ondracek, Jakub, Norman, Michael, Gerwig, Holger, Bastian, Susanne, Merkel, Maik, Weinhold, Kay, Casans, Andrea, Casquero-Vera, Juan Andrés, Gómez-Moreno, Francisco J., Artíñano, Begoña, Gini, Maria, Diapouli, Evangelia, Crumeyrolle, Suzanne, Riffault, Véronique, Petit, Jean-Eudes, Favez, Olivier, Putaud, Jean-Philippe, Santos, Sebastiao Martins Dos, Timonen, Hilkka, Aalto, Pasi P., Hussein, Tareq, Lampilahti, Janne, Hopke, Philip K., Wiedensohler, Alfred, Harrison, Roy M., Petäjä, Tuukka, Pandolfi, Marco, Alastuey, Andrés, and Querol, Xavier
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- 2023
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6. Measurement of road traffic brake and tyre dust emissions using both particle composition and size distribution data
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Beddows, David C.S., Harrison, Roy M., Gonet, Tomasz, Maher, Barbara A., and Odling, Nicholas
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- 2023
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7. The variability of mass concentrations and source apportionment analysis of equivalent black carbon across urban Europe
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Savadkoohi, Marjan, Pandolfi, Marco, Reche, Cristina, Niemi, Jarkko V., Mooibroek, Dennis, Titos, Gloria, Green, David C., Tremper, Anja H., Hueglin, Christoph, Liakakou, Eleni, Mihalopoulos, Nikos, Stavroulas, Iasonas, Artiñano, Begoña, Coz, Esther, Alados-Arboledas, Lucas, Beddows, David, Riffault, Véronique, De Brito, Joel F., Bastian, Susanne, Baudic, Alexia, Colombi, Cristina, Costabile, Francesca, Chazeau, Benjamin, Marchand, Nicolas, Gómez-Amo, José Luis, Estellés, Víctor, Matos, Violeta, van der Gaag, Ed, Gille, Grégory, Luoma, Krista, Manninen, Hanna E., Norman, Michael, Silvergren, Sanna, Petit, Jean-Eudes, Putaud, Jean-Philippe, Rattigan, Oliver V., Timonen, Hilkka, Tuch, Thomas, Merkel, Maik, Weinhold, Kay, Vratolis, Stergios, Vasilescu, Jeni, Favez, Olivier, Harrison, Roy M., Laj, Paolo, Wiedensohler, Alfred, Hopke, Philip K., Petäjä, Tuukka, Alastuey, Andrés, and Querol, Xavier
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- 2023
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8. Monitoring and apportioning sources of indoor air quality using low-cost particulate matter sensors
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Bousiotis, Dimitrios, Alconcel, Leah-Nani S., Beddows, David C.S., Harrison, Roy M., and Pope, Francis D.
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- 2023
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9. Limited impact of diesel particle filters on road traffic emissions of ultrafine particles
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Damayanti, Seny, Harrison, Roy M., Pope, Francis, and Beddows, David C.S.
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- 2023
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10. Phenomenology of ultrafine particle concentrations and size distribution across urban Europe
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Trechera, Pedro, Garcia-Marlès, Meritxell, Liu, Xiansheng, Reche, Cristina, Pérez, Noemí, Savadkoohi, Marjan, Beddows, David, Salma, Imre, Vörösmarty, Máté, Casans, Andrea, Casquero-Vera, Juan Andrés, Hueglin, Christoph, Marchand, Nicolas, Chazeau, Benjamin, Gille, Grégory, Kalkavouras, Panayiotis, Mihalopoulos, Nikos, Ondracek, Jakub, Zikova, Nadia, Niemi, Jarkko V., Manninen, Hanna E., Green, David C., Tremper, Anja H., Norman, Michael, Vratolis, Stergios, Eleftheriadis, Konstantinos, Gómez-Moreno, Francisco J., Alonso-Blanco, Elisabeth, Gerwig, Holger, Wiedensohler, Alfred, Weinhold, Kay, Merkel, Maik, Bastian, Susanne, Petit, Jean-Eudes, Favez, Olivier, Crumeyrolle, Suzanne, Ferlay, Nicolas, Martins Dos Santos, Sebastiao, Putaud, Jean-Philippe, Timonen, Hilkka, Lampilahti, Janne, Asbach, Christof, Wolf, Carmen, Kaminski, Heinz, Altug, Hicran, Hoffmann, Barbara, Rich, David Q., Pandolfi, Marco, Harrison, Roy M., Hopke, Philip K., Petäjä, Tuukka, Alastuey, Andrés, and Querol, Xavier
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- 2023
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11. Road Traffic Emissions Lead to Much Enhanced New Particle Formation through Increased Growth Rates
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Brean, James, primary, Rowell, Alex, additional, Beddows, David C.S., additional, Weinhold, Kay, additional, Mettke, Peter, additional, Merkel, Maik, additional, Tuch, Thomas, additional, Rissanen, Matti, additional, Maso, Miikka Dal, additional, Kumar, Avinash, additional, Barua, Shawon, additional, Iyer, Siddharth, additional, Karppinen, Alexandra, additional, Wiedensohler, Alfred, additional, Shi, Zongbo, additional, and Harrison, Roy M., additional
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- 2024
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12. Direct Measurements of Covalently Bonded Sulfuric Anhydrides from Gas-Phase Reactions of SO3 with Acids under Ambient Conditions
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Kumar, Avinash, primary, Iyer, Siddharth, additional, Barua, Shawon, additional, Brean, James, additional, Besic, Emin, additional, Seal, Prasenjit, additional, Dall’Osto, Manuel, additional, Beddows, David C. S., additional, Sarnela, Nina, additional, Jokinen, Tuija, additional, Sipilä, Mikko, additional, Harrison, Roy M., additional, and Rissanen, Matti, additional
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- 2024
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13. Increased aerosol concentrations in the High Arctic attributable to changing atmospheric transport patterns
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Pernov, Jakob Boyd, Beddows, David, Thomas, Daniel Charles, Dall´Osto, Manuel, Harrison, Roy M., Schmale, Julia, Skov, Henrik, and Massling, Andreas
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- 2022
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14. Non-linearity of secondary pollutant formation estimated from emissions data and measured precursor-secondary pollutant relationships
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Harrison, Roy M., Beddows, David C. S., Tong, Chengxu, and Damayanti, Seny
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- 2022
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15. Insights into the sources of ultrafine particle numbers at six European urban sites obtained by investigating COVID-19 lockdowns.
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Rowell, Alex, Brean, James, Beddows, David C. S., Petäjä, Tuukka, Vörösmarty, Máté, Salma, Imre, Niemi, Jarkko V., Manninen, Hanna E., van Pinxteren, Dominik, Tuch, Thomas, Weinhold, Kay, Shi, Zongbo, and Harrison, Roy M.
- Subjects
EMISSIONS (Air pollution) ,COVID-19 pandemic ,STAY-at-home orders ,PARTICLE size distribution ,CITIES & towns - Abstract
Lockdown restrictions in response to the COVID-19 pandemic led to the curtailment of many activities and reduced emissions of primary air pollutants. Here, we applied positive matrix factorisation to particle size distribution (PSD) data from six monitoring sites (three urban background and three roadside) between four European cities (Helsinki, Leipzig, Budapest, and London) to evaluate how particle number concentrations (PNCs) and their sources changed during the respective 2020 lockdown periods compared to the reference years 2014–2019. A number of common factors were resolved between sites, including nucleation, road traffic semi-volatile fraction (road traffic svf), road traffic solid fraction (road traffic sf), diffuse urban (wood smoke + aged traffic), ozone-associated secondary aerosol (O 3 -associated SA), and secondary inorganic aerosol (SIA). Nucleation, road traffic, and diffuse urban factors were the largest contributors to mean PNCs during the reference years and respective lockdown periods. However, SIA factors were the largest contributors to particle mass concentrations, irrespective of environment type. Total mean PNCs were lower at two of the urban-background and all roadside sites during lockdown. The response of nucleation and road traffic svf factors to lockdown restrictions was highly variable, although road traffic sf factors were consistently lower at roadside sites. The responses of diffuse urban factors were largely consistent and were mostly lower at urban-background sites. Secondary aerosols (O 3 -associated SA and SIA) exhibited extensive reductions in their mean PNCs at all sites. These variegated responses to lockdowns across Europe point to a complex network of sources and aerosol sinks contributing to PSDs. [ABSTRACT FROM AUTHOR]
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- 2024
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16. The optical properties and direct radiative forcing potential of atmospheric aerosols in Northeastern Greenland
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Thomas, Daniel Charles, primary, Beddows, David, additional, Pernov, Jakob Boyd, additional, Massling, Andreas, additional, Nøjgaard, Jakob Klenø, additional, Harrison, Roy M., additional, Dall'Osto, Manuel, additional, Močnik, Griša, additional, and Skov, Henrik, additional
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- 2024
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17. Supplementary material to "The behaviour of charged particles (ions) during new particle formation events in urban Leipzig (Germany)"
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Rowell, Alex, primary, Brean, James, additional, Beddows, David C. S., additional, Shi, Zongbo, additional, Kumar, Avinash, additional, Rissanen, Matti, additional, Dal Maso, Miikka, additional, Mettke, Peter, additional, Weinhold, Kay, additional, Merkel, Maik, additional, and Harrison, Roy M., additional
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- 2024
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18. The behaviour of charged particles (ions) during new particle formation events in urban Leipzig (Germany)
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Rowell, Alex, primary, Brean, James, additional, Beddows, David C. S., additional, Shi, Zongbo, additional, Kumar, Avinash, additional, Rissanen, Matti, additional, Dal Maso, Miikka, additional, Mettke, Peter, additional, Weinhold, Kay, additional, Merkel, Maik, additional, and Harrison, Roy M., additional
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- 2024
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19. Characterizing the Atmospheric Mn Cycle and Its Impact on Terrestrial Biogeochemistry
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Lu, Louis, primary, Li, Longlei, additional, Rathod, Sagar, additional, Hess, Peter, additional, Martínez, Carmen, additional, Fernandez, Nicole, additional, Goodale, Christine, additional, Thies, Janice, additional, Wong, Michelle Y., additional, Alaimo, Maria Grazia, additional, Artaxo, Paulo, additional, Barraza, Francisco, additional, Barreto, Africa, additional, Beddows, David, additional, Chellam, Shankarararman, additional, Chen, Ying, additional, Chuang, Patrick, additional, Cohen, David D., additional, Dongarrà, Gaetano, additional, Gaston, Cassandra, additional, Gómez, Darío, additional, Morera‐Gómez, Yasser, additional, Hakola, Hannele, additional, Hand, Jenny, additional, Harrison, Roy, additional, Hopke, Philip, additional, Hueglin, Christoph, additional, Kuang, Yuan‐Wen, additional, Kyllönen, Katriina, additional, Lambert, Fabrice, additional, Maenhaut, Willy, additional, Martin, Randall, additional, Paytan, Adina, additional, Prospero, Joseph, additional, González, Yenny, additional, Rodriguez, Sergio, additional, Smichowski, Patricia, additional, Varrica, Daniela, additional, Walsh, Brenna, additional, Weagle, Crystal, additional, Xiao, Yi‐Hua, additional, and Mahowald, Natalie, additional
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- 2024
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20. Open ocean and coastal new particle formation from sulfuric acid and amines around the Antarctic Peninsula
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Brean, James, Dall’Osto, Manuel, Simó, Rafel, Shi, Zongbo, Beddows, David C. S., and Harrison, Roy M.
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- 2021
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21. PM10 and PM2.5 emission factors for non-exhaust particles from road vehicles: Dependence upon vehicle mass and implications for battery electric vehicles
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Beddows, David C.S. and Harrison, Roy M.
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- 2021
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22. Inter-annual trends of ultrafine particles in urban Europe
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European Commission, 0000-0003-2680-5627, 0000-0003-2667-5973, 0000-0002-3707-2601, 0000-0001-8319-1647, 0000-0001-5023-7039, 0000-0001-8753-386X, 0000-0003-2265-4905, 0000-0002-8435-5575, 0000-0001-9430-6155, 0000-0002-8821-1923, 0000-0003-4454-0642, 0000-0002-1881-9044, 0000-0002-5453-5495, Garcia-Marlès, Meritxell, Lara, Rosa, Reche, Cristina, Pérez, Noemí, Tobías, Aurelio, Savadkoohi, Marjan, Beddows, David, Salma, Imre, Vörösmarty, Máté, Weidinger, Tamás, Hueglin, Christoph, Mihalopoulos, Nikos, Grivas, Georgios, Kalkavouras, Panayiotis, Ondráček, Jakub, Zíková, Nadĕžda, Niemi, Jarkko V., Manninen, Hanna E., Green, David C., Tremper, Anja H., Norman, Michael, Vratolis, Stergios, Eleftheriadis, Konstantinos, Gómez-Moreno, Francisco J., Alonso-Blanco, Elisabeth, Wiedensohler, Alfred, Weinhold, Kay, Merkel, Maik, Bastian, Susanne, Hoffmann, Barbara, Altug, Hicran, Petit, Jean-Eudes, Favez, Olivier, Dos Santos, Sebastiao Martins, Putaud, Jean-Philippe, Dinoi, Adelaide, Contini, Daniele, Timonen, Hilkka, Lampilahti, Janne, Petäjä, Tuukka, Pandolfi, Marco, Hopke, Philip K., Harrison, Roy M., Alastuey, Andrés, Querol, Xavier, European Commission, 0000-0003-2680-5627, 0000-0003-2667-5973, 0000-0002-3707-2601, 0000-0001-8319-1647, 0000-0001-5023-7039, 0000-0001-8753-386X, 0000-0003-2265-4905, 0000-0002-8435-5575, 0000-0001-9430-6155, 0000-0002-8821-1923, 0000-0003-4454-0642, 0000-0002-1881-9044, 0000-0002-5453-5495, Garcia-Marlès, Meritxell, Lara, Rosa, Reche, Cristina, Pérez, Noemí, Tobías, Aurelio, Savadkoohi, Marjan, Beddows, David, Salma, Imre, Vörösmarty, Máté, Weidinger, Tamás, Hueglin, Christoph, Mihalopoulos, Nikos, Grivas, Georgios, Kalkavouras, Panayiotis, Ondráček, Jakub, Zíková, Nadĕžda, Niemi, Jarkko V., Manninen, Hanna E., Green, David C., Tremper, Anja H., Norman, Michael, Vratolis, Stergios, Eleftheriadis, Konstantinos, Gómez-Moreno, Francisco J., Alonso-Blanco, Elisabeth, Wiedensohler, Alfred, Weinhold, Kay, Merkel, Maik, Bastian, Susanne, Hoffmann, Barbara, Altug, Hicran, Petit, Jean-Eudes, Favez, Olivier, Dos Santos, Sebastiao Martins, Putaud, Jean-Philippe, Dinoi, Adelaide, Contini, Daniele, Timonen, Hilkka, Lampilahti, Janne, Petäjä, Tuukka, Pandolfi, Marco, Hopke, Philip K., Harrison, Roy M., Alastuey, Andrés, and Querol, Xavier
- Abstract
Ultrafine particles (UFP, those with diameters ≤ 100 nm), have been reported to potentially penetrate deeply into the respiratory system, translocate through the alveoli, and affect various organs, potentially correlating with increased mortality. The aim of this study is to assess long-term trends (5-11 years) in mostly urban UFP concentrations based on measurements of particle number size distributions (PNSD). Additionally, concentrations of other pollutants and meteorological variables were evaluated to support the interpretations. PNSD datasets from 12 urban background (UB), 5 traffic (TR), 3 suburban background (SUB) and 1 regional background (RB) sites in 15 European cities and 1 in the USA were evaluated. The non-parametric Theil-Sen's method was used to detect monotonic trends. Meta-analyses were carried out to assess the overall trends and those for different environments. The results showed significant decreases in NO, NO2, BC, CO, and particle concentrations in the Aitken (25-100 nm) and the Accumulation (100-800 nm) modes, suggesting a positive impact of the implementation of EURO 5/V and 6/VI vehicle standards on European air quality. The growing use of Diesel Particle Filters (DPFs) might also have clearly reduced exhaust emissions of BC, PM, and the Aitken and Accumulation mode particles. However, as reported by prior studies, there remains an issue of poor control of Nucleation mode particles (smaller than 25 nm), which are not fully reduced with current DPFs, without emission controls for semi-volatile organic compounds, and might have different origins than road traffic. Thus, contrasting trends for Nucleation mode particles were obtained across the cities studied. This mode also affected the UFP and total PNC trends because of the high proportion of Nucleation mode particles in both concentration ranges. It was also found that the urban temperature increasing trends might have also influenced those of PNC, Nucleation and Aitken modes.
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- 2024
23. Direct Measurements of Covalently Bonded Sulfuric Anhydrides from Gas-Phase Reactions of SO3 with Acids under Ambient Conditions.
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Kumar, Avinash, Iyer, Siddharth, Barua, Shawon, Brean, James, Besic, Emin, Seal, Prasenjit, Dall'Osto, Manuel, Beddows, David C. S., Sarnela, Nina, Jokinen, Tuija, Sipilä, Mikko, Harrison, Roy M., and Rissanen, Matti
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- 2024
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24. Simultaneous organic aerosol source apportionment at two Antarctic sites reveals large-scale and ecoregion-specific components.
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Paglione, Marco, Beddows, David C. S., Jones, Anna, Lachlan-Cope, Thomas, Rinaldi, Matteo, Decesari, Stefano, Manarini, Francesco, Russo, Mara, Mansour, Karam, Harrison, Roy M., Mazzanti, Andrea, Tagliavini, Emilio, and Dall'Osto, Manuel
- Subjects
AEROSOLS ,ATMOSPHERIC circulation ,TERRITORIAL waters ,AIR masses ,MAGNETIC resonance ,SEA ice ,SUBGLACIAL lakes - Abstract
Antarctica and the Southern Ocean (SO) are the most pristine areas of the globe and represent ideal places to investigate aerosol–climate interactions in an unperturbed atmosphere. In this study, we present submicrometer aerosol (PM 1) source apportionment for two sample sets collected in parallel at the British Antarctic Survey stations of Signy and Halley during the austral summer of 2018–2019. Water-soluble organic matter (WSOM) is a major aerosol component at both sites (37 % and 29 % of water-soluble PM 1 , on average, at Signy and Halley, respectively). Remarkable differences between pelagic (open-ocean) and sympagic (influenced by sea ice) air mass histories and related aerosol sources are found. The application of factor analysis techniques to series of spectra obtained by means of proton-nuclear magnetic resonance (H-NMR) spectroscopy on the samples allows the identification of five organic aerosol (OA) sources: two primary organic aerosol (POA) types, characterized by sugars, polyols, and degradation products of lipids and associated with open-ocean and sympagic/coastal waters, respectively; two secondary organic aerosol (SOA) types, one enriched in methanesulfonic acid (MSA) and dimethylamine (DMA) and associated with pelagic waters and the other characterized by trimethylamine (TMA) and linked to sympagic environments; and a fifth component of unclear origin, possibly associated with the atmospheric aging of primary emissions. Overall, our results strongly indicate that the emissions from sympagic and pelagic ecosystems affect the variability in the submicrometer aerosol composition in the study area, with atmospheric circulation establishing marked latitudinal gradients only for some of the aerosol components (e.g., the sympagic components) while distributing the others (e.g., pelagic and/or aged components) both in maritime and inner Antarctic regions. [ABSTRACT FROM AUTHOR]
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- 2024
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25. Multiple eco-regions contribute to the seasonal cycle of Antarctic aerosol size distributions.
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Brean, James, Beddows, David C. S., Asmi, Eija, Virkkula, Aki, Quéléver, Lauriane L. J., Sipilä, Mikko, Van Den Heuvel, Floortje, Lachlan-Cope, Thomas, Jones, Anna E., Frey, Markus, Lupi, Angelo, Park, Jiyeon, Young Jun Yoon, Weller, Rolf, Marincovich, Giselle L., Mulena, Gabriela C., Harrison, Roy M., and Dall'Osto, Manuel
- Abstract
In order to reduce the uncertainty of aerosol radiative forcing in global climate models, we need to better understand natural aerosol sources which are important to constrain the current and pre-industrial climate. Here, we analyze Particle Number Size Distributions (PNSD) collected during a year (2015) across four coastal and inland Antarctic research bases (Halley, Marambio, Concordia/Dome C and King Sejong). We find that the four Antarctic locations have striking differences in PNSD, stressing multiple aerosol sources and processes likely exist. We utilise k-means cluster analysis to separate the PNSD data into six main categories. Nucleation and Bursting PNSDs occur 28-48% of the time between sites, most commonly at coastal sites Marambio and King Sejong where air masses mostly come from the west and travel over extensive regions of sea ice, marginal ice, and open ocean, and likely arise from new particle formation. Aitken high, Aitken low, and bimodal PNSDs occur 37-68% of the time, most commonly at Concordia/Dome C on the Antarctic Plateau, and likely arise from atmospheric transport and aging from aerosol originating likely in both coastal boundary layer and free troposphere. Pristine PNSDs with low aerosol concentrations occur 12-45% of the time, most common at Halley located at low altitudes and far from the coastal melting ice, and influenced by air masses from the west. The Antarctic Atmospheric circulation has a strong control on the air mass origin type. Most of the time Marambio and King Sejong stations are affected by Easterly air masses, whereas Halley gets air masses mainly from the Weddell sea marginal and consolidated pack ice. Not only the sea spray primary aerosols and gas to particle secondary aerosols sources, but also the different air masses impacting the research stations should be kept in mind when deliberating upon different aerosol precursors sources across research stations. We provide evidence that both primary and secondary components from pelagic and sympagic regions strongly contribute to the annual seasonal cycle of Antarctic aerosols which add insight on the possible sources of aerosol production/activity in the whole Antarctic region. Our simultaneous aerosol measurements stress the importance of the variation in atmospheric biogeochemistry across the Antarctic region. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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26. Size-resolved physico-chemical characterization of diesel exhaust particles and efficiency of exhaust aftertreatment
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Zeraati-Rezaei, Soheil, Alam, Mohammed S., Xu, Hongming, Beddows, David C., and Harrison, Roy M.
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- 2020
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27. Insights into the sources of ultrafine particle numbers at six European urban sites obtained by investigating COVID–19 lockdowns
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Rowell, Alex, primary, Brean, James, additional, Beddows, David C. S., additional, Shi, Zongbo, additional, Petäjä, Tuukka, additional, Vörösmarty, Máté, additional, Salma, Imre, additional, Niemi, Jarkko V., additional, Manninen, Hanna E., additional, van Pinxteren, Dominik, additional, Harrison, Roy M., additional, Tuch, Thomas, additional, and Weinhold, Kay, additional
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- 2024
- Full Text
- View/download PDF
28. Supplementary material to "Insights into the sources of ultrafine particle numbers at six European urban sites obtained by investigating COVID–19 lockdowns"
- Author
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Rowell, Alex, primary, Brean, James, additional, Beddows, David C. S., additional, Shi, Zongbo, additional, Petäjä, Tuukka, additional, Vörösmarty, Máté, additional, Salma, Imre, additional, Niemi, Jarkko V., additional, Manninen, Hanna E., additional, van Pinxteren, Dominik, additional, Harrison, Roy M., additional, Tuch, Thomas, additional, and Weinhold, Kay, additional
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- 2024
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29. Diesel exhaust nanoparticles and their behaviour in the atmosphere
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Harrison, Roy M., Rob MacKenzie, A., Xu, Hongming, Alam, Mohammed S., Nikolova, Irina, Zhong, Jian, Singh, Ajit, Zeraati-Rezaei, Soheil, Stark, Christopher, Beddows, David C. S., Liang, Zhirong, Xu, Ruixin, and Cai, Xiaoming
- Published
- 2018
30. Surface ozone climatology of South Eastern Brazil and the impact of biomass burning events
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Targino, Admir Créso, Harrison, Roy M., Krecl, Patricia, Glantz, Paul, de Lima, Caroline Hatada, and Beddows, David
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- 2019
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31. Cluster analysis of urban ultrafine particles size distributions
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Agudelo-Castañeda, Dayana M., Teixeira, Elba C., Braga, Marcel, Rolim, Silvia B.A., Silva, Luis F.O., Beddows, David C.S., Harrison, Roy M., and Querol, Xavier
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- 2019
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32. Direct Measurements of Covalently Bonded Sulfuric Anhydrides from Gas-Phase Reactions of SO3with Acids under Ambient Conditions
- Author
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Kumar, Avinash, Iyer, Siddharth, Barua, Shawon, Brean, James, Besic, Emin, Seal, Prasenjit, Dall’Osto, Manuel, Beddows, David C. S., Sarnela, Nina, Jokinen, Tuija, Sipilä, Mikko, Harrison, Roy M., and Rissanen, Matti
- Abstract
Sulfur trioxide (SO3) is an important oxide of sulfur and a key intermediate in the formation of sulfuric acid (H2SO4, SA) in the Earth’s atmosphere. This conversion to SA occurs rapidly due to the reaction of SO3with a water dimer. However, gas-phase SO3has been measured directly at concentrations that are comparable to that of SA under polluted mega-city conditions, indicating gaps in our current understanding of the sources and fates of SO3. Its reaction with atmospheric acids could be one such fate that can have significant implications for atmospheric chemistry. In the present investigation, laboratory experiments were conducted in a flow reactor to generate a range of previously uncharacterized condensable sulfur-containing reaction products by reacting SO3with a set of atmospherically relevant inorganic and organic acids at room temperature and atmospheric pressure. Specifically, key inorganic acids known to be responsible for most ambient new particle formation events, iodic acid (HIO3, IA) and SA, are observed to react promptly with SO3to form iodic sulfuric anhydride (IO3SO3H, ISA) and disulfuric acid (H2S2O7, DSA). Carboxylic sulfuric anhydrides (CSAs) were observed to form by the reaction of SO3with C2and C3monocarboxylic (acetic and propanoic acid) and dicarboxylic (oxalic and malonic acid)–carboxylic acids. The formed products were detected by a nitrate-ion-based chemical ionization atmospheric pressure interface time-of-flight mass spectrometer (NO3–-CI-APi-TOF; NO3–-CIMS). Quantum chemical methods were used to compute the relevant SO3reaction rate coefficients, probe the reaction mechanisms, and model the ionization chemistry inherent in the detection of the products by NO3–-CIMS. Additionally, we use NO3–-CIMS ambient data to report that significant concentrations of SO3and its acid anhydride reaction products are present under polluted, marine and polar, and volcanic plume conditions. Considering that these regions are rich in the acid precursors studied here, the reported reactions need to be accounted for in the modeling of atmospheric new particle formation.
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- 2024
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33. The behaviour of charged particles (ions) during new particle formation events in urban Leipzig (Germany).
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Rowell, Alex, Brean, James, Beddows, David C. S., Shi, Zongbo, Kumar, Avinash, Rissanen, Matti, Maso, Miikka Dal, Mettke, Peter, Weinhold, Kay, Merkel, Maik, and Harrison, Roy M.
- Subjects
COMPLEX ions ,SOLAR radiation ,IONS ,AIR pollution ,SULFURIC acid ,RADIOACTIVE decay ,ATMOSPHERIC nucleation ,PARTICLE analysis - Abstract
Air ions are electrically charged molecules or particles in air. They are found in the natural environment. Charging accelerates the formation and growth of new aerosol particles. A Neutral cluster and Air Ion Spectrometer was deployed in Leipzig, Germany, to measure the number size distribution of ions from 0.8 to 42 nm, between July 27
th and August 25th 2022. Charged particles were mobility classified into small (0.8–1.6 nm), intermediate (1.6–7.5 nm), and large (7.5–22 nm) fractions and their mean concentrations (sum of positive and negative polarities) during the campaign were 462, 88, and 420 cm-3 , respectively. The study found that small charged particles were primarily associated with radioactive decay during the early hours, while the intermediate and large charged fractions were linked to photochemistry and local air pollution, as indicated via synchronous peaks in sulphuric acid dimer and black carbon concentrations, respectively. NPF events, observed on 30 % of days, coincided with intense solar radiation. Small charged particle concentrations were lower on NPF event days, whereas the intermediate and large charged species exhibited higher concentrations. The apparent contributions of charged species to 3 and 7.5 nm particles formation rates were 5.7 and 12.7 %, respectively, with mean growth rates of 4.0 and 5.2 nm h-1 . Although the ratio of apparent formation rates for charged to uncharged nanoparticles of 3 nm suggested a minor role for charged species in NPF, a substantial increase in intermediate and large charged species was associated with NPF events. The findings contribute valuable insights into the complex interplay between charged species and particle formation in urban environments. [ABSTRACT FROM AUTHOR]- Published
- 2024
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34. Supplementary material to "Simultaneous organic aerosol source apportionment at two Antarctic sites reveals large-scale and eco-region specific components"
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Paglione, Marco, primary, Beddows, David C. S., additional, Jones, Anna, additional, Lachlan-Cope, Thomas, additional, Rinaldi, Matteo, additional, Decesari, Stefano, additional, Manarini, Francesco, additional, Russo, Mara, additional, Mansour, Karam, additional, Harrison, Roy M., additional, Mazzanti, Andrea, additional, Tagliavini, Emilio, additional, and Dall'Osto, Manuel, additional
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- 2023
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35. Simultaneous organic aerosol source apportionment at two Antarctic sites reveals large-scale and eco-region specific components
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Paglione, Marco, primary, Beddows, David C. S., additional, Jones, Anna, additional, Lachlan-Cope, Thomas, additional, Rinaldi, Matteo, additional, Decesari, Stefano, additional, Manarini, Francesco, additional, Russo, Mara, additional, Mansour, Karam, additional, Harrison, Roy M., additional, Mazzanti, Andrea, additional, Tagliavini, Emilio, additional, and Dall'Osto, Manuel, additional
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- 2023
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36. Characterizing the Atmospheric Mn Cycle and Its Impact on Terrestrial Biogeochemistry
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Lu, Louis, primary, Li, Longlei, additional, Rathod, Sagar Dilipbhai, additional, Hess, Peter George, additional, Martinez, Carmen Enid, additional, Fernandez, Nicole M, additional, Goodale, Christine, additional, Thies, Janice E., additional, Wong, Michelle Y, additional, Alaimo, Maria Grazia, additional, Artaxo, Paulo, additional, Barraza, Francisco, additional, Barreto, África, additional, Beddows, David C.S., additional, Chellam, Shankar, additional, Chen, Ying, additional, Chuang, Patrick Y., additional, Cohen, David Damien, additional, Dongarra, Gaetano, additional, Gaston, Cassandra J., additional, Gomez, Dario, additional, Morera-Gomez, Yasser, additional, Hakola, Hannele, additional, Hand, Jenny L, additional, Harrison, Roy M., additional, Hopke, Philip K., additional, Hueglin, Christoph, additional, Kuang, Yuan-wen, additional, Kyllönen, Katriina, additional, Lambert, Fabrice, additional, Maenhaut, Willy, additional, Martin, Randall V, additional, Paytan, Adina, additional, Prospero, Joseph M., additional, González, Yenny, additional, Rodriguez, Sergio, additional, Smichowski,, Patricia, additional, Varrica,, Daniela, additional, Walsh, Brenna, additional, Weagle, Crystal, additional, Xiao, Yi-hua, additional, and Mahowald, Natalie M, additional
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- 2023
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37. Complex refractive index and single scattering albedo of Icelandic dust in the shortwave part of the spectrum
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Baldo, Clarissa, primary, Formenti, Paola, additional, Di Biagio, Claudia, additional, Lu, Gongda, additional, Song, Congbo, additional, Cazaunau, Mathieu, additional, Pangui, Edouard, additional, Doussin, Jean-Francois, additional, Dagsson-Waldhauserova, Pavla, additional, Arnalds, Olafur, additional, Beddows, David, additional, MacKenzie, A. Robert, additional, and Shi, Zongbo, additional
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- 2023
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38. Complex refractive index and single scattering albedo of Icelandic dust in the shortwave part of the spectrum
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Baldo, Clarissa, Formenti, Paola, Biagio, Claudia, Lu, Gongda, Song, Congbo, Cazaunau, Mathieu, Pangui, Edouard, Doussin, Jean-Francois, Dagsson-Waldhauserova, Pavla, Arnalds, Olafur, Beddows, David, MacKenzie, A. Robert, and Shi, Zongbo
- Abstract
Icelandic dust can impact the radiative budget in high-latitude regions directly by affecting light absorption and scattering and indirectly by changing the surface albedo after dust deposition. This tends to produce a positive radiative forcing. However, the limited knowledge of the spectral optical properties of Icelandic dust prevents an accurate assessment of these radiative effects. Here, the spectral single scattering albedo (SSA) and the complex refractive index (m=n-ik) of Icelandic dust from five major emission hotspots were retrieved between 370–950 nm using online measurements of size distribution and spectral absorption (βabs) and scattering (βsca) coefficients of particles suspended in a large-scale atmospheric simulation chamber. The SSA(λ) estimated from the measured βabs and βsca increased from 0.90–0.94 at 370 nm to 0.94–0.96 at 950 nm in Icelandic dust from the different hotspots, which falls within the range of mineral dust from northern Africa and eastern Asia. The spectral complex refractive index was retrieved by minimizing the differences between the measured βabs and βsca and those computed using the Mie theory for spherical and internally homogeneous particles, using the size distribution data as input. The real part of the complex refractive index (n(λ)) was found to be 1.60–1.61 in the different samples and be independent of wavelength. The imaginary part (k(λ)) was almost constant with wavelength and was found to be around 0.004 at 370 nm and 0.002–0.003 at 950 nm. The estimated complex refractive index was close to the initial estimates based on the mineralogical composition, also suggesting that the high magnetite content observed in Icelandic dust may contribute to its high absorption capacity in the shortwave part of the spectrum. The k(λ) values retrieved for Icelandic dust are at the upper end of the reported range for low-latitude dust (e.g., from the Sahel). Furthermore, Icelandic dust tends to be more absorbing towards the near-infrared. In Icelandic dust, k(λ) between 660–950 nm was 2–8 times higher than most of the dust samples sourced in northern Africa and eastern Asia. This suggests that Icelandic dust may have a stronger positive direct radiative forcing on climate that has not been accounted for in climate predictions.
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- 2023
39. Estimates of Future New Particle Formation under Different Emission Scenarios in Beijing
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Brean, James, primary, Rowell, Alex, additional, Beddows, David C. S., additional, Shi, Zongbo, additional, and Harrison, Roy M., additional
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- 2023
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40. Supplementary material to "Complex refractive index and single scattering albedo of Icelandic dust in the shortwave spectrum"
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Baldo, Clarissa, primary, Formenti, Paola, additional, Di Biagio, Claudia, additional, Lu, Gongda, additional, Song, Congbo, additional, Cazaunau, Mathieu, additional, Pangui, Edouard, additional, Doussin, Jean-Francois, additional, Dagsson-Waldhauserova, Pavla, additional, Arnalds, Olafur, additional, Beddows, David, additional, MacKenzie, A. Robert, additional, and Shi, Zongbo, additional
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- 2023
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41. Complex refractive index and single scattering albedo of Icelandic dust in the shortwave spectrum
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Baldo, Clarissa, primary, Formenti, Paola, additional, Di Biagio, Claudia, additional, Lu, Gongda, additional, Song, Congbo, additional, Cazaunau, Mathieu, additional, Pangui, Edouard, additional, Doussin, Jean-Francois, additional, Dagsson-Waldhauserova, Pavla, additional, Arnalds, Olafur, additional, Beddows, David, additional, MacKenzie, A. Robert, additional, and Shi, Zongbo, additional
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- 2023
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42. Detecting high emitting vehicle subsets using emission remote sensing systems
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Ghaffarpasand, Omid, primary, Ropkins, Karl, additional, Beddows, David C.S., additional, and Pope, Francis D., additional
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- 2023
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43. A full year of aerosol size distribution data from the central Arctic under an extreme positive Arctic Oscillation : insights from the Multidisciplinarydrifting Observatory for the Study of Arctic Climate (MOSAiC) expedition
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Boyer, Matthew, Aliaga, Diego, Pernov, Jakob Boyd, Angot, Hélène, Quéléver, Lauriane L. J., Dada, Lubna, Heutte, Benjamin, Dall'Osto, Manuel, Beddows, David C. S., Brasseur, Zoé, Beck, Ivo, Bucci, Silvia, Duetsch, Marina, Stohl, Andreas, Laurila, Tiia, Asmi, Eija, Massling, Andreas, Thomas, Daniel Charles, Klenø Nøjgaard, Jakob, Chan, Tak, Sharma, Sangeeta, Tunved, Peter, Krejci, Radovan, Hansson, Hans-Christen, Bianchi, Federico, Lehtipalo, Katrianne, Wiedensohler, Alfred, Weinhold, Kay, Kulmala, Markku, Petäjä, Tuukka, Sipilä, Mikko, Schmale, Julia, Jokinen, Tuija, Boyer, Matthew, Aliaga, Diego, Pernov, Jakob Boyd, Angot, Hélène, Quéléver, Lauriane L. J., Dada, Lubna, Heutte, Benjamin, Dall'Osto, Manuel, Beddows, David C. S., Brasseur, Zoé, Beck, Ivo, Bucci, Silvia, Duetsch, Marina, Stohl, Andreas, Laurila, Tiia, Asmi, Eija, Massling, Andreas, Thomas, Daniel Charles, Klenø Nøjgaard, Jakob, Chan, Tak, Sharma, Sangeeta, Tunved, Peter, Krejci, Radovan, Hansson, Hans-Christen, Bianchi, Federico, Lehtipalo, Katrianne, Wiedensohler, Alfred, Weinhold, Kay, Kulmala, Markku, Petäjä, Tuukka, Sipilä, Mikko, Schmale, Julia, and Jokinen, Tuija
- Abstract
The Arctic environment is rapidly changing due to accelerated warming in the region. The warming trend is driving a decline in sea ice extent, which thereby enhances feedback loops in the surface energy budget in the Arctic. Arctic aerosols play an important role in the radiative balance and hence the climate response in the region, yet direct observations of aerosols over the Arctic Ocean are limited. In this study, we investigate the annual cycle in the aerosol particle number size distribution (PNSD), particle number concentration (PNC), and black carbon (BC) mass concentration in the central Arctic during the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition. This is the first continuous, year-long data set of aerosol PNSD ever collected over the sea ice in the central Arctic Ocean. We use a k-means cluster analysis, FLEXPART simulations, and inverse modeling to evaluate seasonal patterns and the influence of different source regions on the Arctic aerosol population. Furthermore, we compare the aerosol observations to land-based sites across the Arctic, using both long-term measurements and observations during the year of the MOSAiC expedition (2019–2020), to investigate interannual variability and to give context to the aerosol characteristics from within the central Arctic. Our analysis identifies that, overall, the central Arctic exhibits typical seasonal patterns of aerosols, including anthropogenic influence from Arctic haze in winter and secondary aerosol processes in summer. The seasonal pattern corresponds to the global radiation, surface air temperature, and timing of sea ice melting/freezing, which drive changes in transport patterns and secondary aerosol processes. In winter, the Norilsk region in Russia/Siberia was the dominant source of Arctic haze signals in the PNSD and BC observations, which contributed to higher accumulation-mode PNC and BC mass concentrations in the central Arctic than at land-based obse
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- 2023
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44. Collective geographical ecoregions and precursor sources driving Arctic new particle formation
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Brean, James, Beddows, David C. S., Harrison, Roy M., Song, Congbo, Tunved, Peter, Ström, Johan, Krejci, Radovan, Freud, Eyal, Massling, Andreas, Skov, Henrik, Asmi, Eija, Lupi, Angelo, Dall'Osto, Manuel, Brean, James, Beddows, David C. S., Harrison, Roy M., Song, Congbo, Tunved, Peter, Ström, Johan, Krejci, Radovan, Freud, Eyal, Massling, Andreas, Skov, Henrik, Asmi, Eija, Lupi, Angelo, and Dall'Osto, Manuel
- Abstract
The Arctic is a rapidly changing ecosystem, with complex ice–ocean–atmosphere feedbacks. An important process is new particle formation (NPF), from gas-phase precursors, which provides a climate forcing effect. NPF has been studied comprehensively at different sites in the Arctic, ranging from those in the High Arctic and those at Svalbard to those in the continental Arctic, but no harmonised analysis has been performed on all sites simultaneously, with no calculations of key NPF parameters available for some sites. Here, we analyse the formation and growth of new particles from six long-term ground-based stations in the Arctic (Alert, Villum, Tiksi, Zeppelin Mountain, Gruvebadet, and Utqiaġvik). Our analysis of particle formation and growth rates in addition to back-trajectory analysis shows a summertime maxima in the frequency of NPF and particle formation rate at all sites, although the mean frequency and particle formation rates themselves vary greatly between sites, with the highest at Svalbard and lowest in the High Arctic. The summertime growth rate, condensational sinks, and vapour source rates show a slight bias towards the southernmost sites, with vapour source rates varying by around an order of magnitude between the northernmost and southernmost sites. Air masses back-trajectories during NPF at these northernmost sites are associated with large areas of sea ice and snow, whereas events at Svalbard are associated with more sea ice and ocean regions. Events at the southernmost sites are associated with large areas of land and sea ice. These results emphasise how understanding the geographical variation in surface type across the Arctic is key to understanding secondary aerosol sources and providing a harmonised analysis of NPF across the Arctic.
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- 2023
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45. Extreme Concentrations of Nitric Oxide Control Daytime Oxidation and Quench Nocturnal Oxidation Chemistry in Delhi during Highly Polluted Episodes
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Nelson, Beth S., Bryant, Daniel J., Alam, Mohammed S., Sommariva, Roberto, Bloss, William J., Newland, Mike J., Drysdale, Will S., Vaughan, Adam R., Acton, W. Joe F., Hewitt, C. Nicholas, Crilley, Leigh R., Swift, Stefan J., Edwards, Pete M., Lewis, Alastair C., Langford, Ben, Nemitz, Eiko, Shivani, Gadi, Ranu, Gurjar, Bhola R., Heard, Dwayne E., Whalley, Lisa K., Şahin, Ülkü A., Beddows, David C. S., Hopkins, James R., Lee, James D., Rickard, Andrew R., Hamilton, Jacqueline F., Nelson, Beth S., Bryant, Daniel J., Alam, Mohammed S., Sommariva, Roberto, Bloss, William J., Newland, Mike J., Drysdale, Will S., Vaughan, Adam R., Acton, W. Joe F., Hewitt, C. Nicholas, Crilley, Leigh R., Swift, Stefan J., Edwards, Pete M., Lewis, Alastair C., Langford, Ben, Nemitz, Eiko, Shivani, Gadi, Ranu, Gurjar, Bhola R., Heard, Dwayne E., Whalley, Lisa K., Şahin, Ülkü A., Beddows, David C. S., Hopkins, James R., Lee, James D., Rickard, Andrew R., and Hamilton, Jacqueline F.
- Abstract
Delhi, India, suffers from periods of very poor air quality, but little is known about the chemical production of secondary pollutants in this highly polluted environment. During the postmonsoon period in 2018, extremely high nighttime concentrations of NOx (NO and NO2) and volatile organic compounds (VOCs) were observed, with median NOx mixing ratios of ∼200 ppbV (maximum of ∼700 ppbV). A detailed chemical box model constrained to a comprehensive suite of speciated VOC and NOx measurements revealed very low nighttime concentrations of oxidants, NO3, O3, and OH, driven by high nighttime NO concentrations. This results in an atypical NO3 diel profile, not previously reported in other highly polluted urban environments, significantly perturbing nighttime radical oxidation chemistry. Low concentrations of oxidants and high nocturnal primary emissions coupled with a shallow boundary layer led to enhanced early morning photo-oxidation chemistry. This results in a temporal shift in peak O3 concentrations when compared to the premonsoon period (12:00 and 15:00 local time, respectively). This shift will likely have important implications on local air quality, and effective urban air quality management should consider the impacts of nighttime emission sources during the postmonsoon period.
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- 2023
46. Ambient air particulate total lung deposited surface area (LDSA) levels in urban Europe
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European Commission, Liu, Xiansheng, Hadiatullah, Hadiatullah, Zhang, Xun, Trechera, Pedro, Savadkoohi, Marjan, García-Marlès, Meritxell, Reche, Cristina, Pérez, Noemí, Beddows, David C. S., Salma, Imre, Thén, Wanda, Kalkavouras, Panayiotis, Mihalopoulos, Nikos, Hueglin, Christoph, Green, David C., Tremper, Anja H., Chazeau, Benjamin, Gille, Grégory, Marchand, Nicolas, Niemi, Jarkko V., Manninen, Hanna E., Portin, Harri, Zikova, Nadezda, Ondracek, Jakub, Norman, Michael, Gerwig, Holger, Bastian, Susanne, Merkel, Maik, Weinhold, Kay, Casans, Andrea, Casquero-Vera, Juan Andrés, Gómez-Moreno, Francisco J., Artíñano, Begoña, Gini, Maria, Diapouli, Evangelia, Crumeyrolle, Suzanne, Riffault, Véronique, Petit, Jean-Eudes, Favez, Olivier, Putaud, Jean-Philippe, Santos, Sebastiao Martins Dos, Timonen, Hilkka, Aalto, Pasi P., Hussein, Tareq, Lampilahti, Janne, Hopke, Philip K., Wiedensohler, Alfred, Harrison, Roy M., Petäjä, Tuukka, Pandolfi, Marco, Alastuey, Andrés, Querol, Xavier, European Commission, Liu, Xiansheng, Hadiatullah, Hadiatullah, Zhang, Xun, Trechera, Pedro, Savadkoohi, Marjan, García-Marlès, Meritxell, Reche, Cristina, Pérez, Noemí, Beddows, David C. S., Salma, Imre, Thén, Wanda, Kalkavouras, Panayiotis, Mihalopoulos, Nikos, Hueglin, Christoph, Green, David C., Tremper, Anja H., Chazeau, Benjamin, Gille, Grégory, Marchand, Nicolas, Niemi, Jarkko V., Manninen, Hanna E., Portin, Harri, Zikova, Nadezda, Ondracek, Jakub, Norman, Michael, Gerwig, Holger, Bastian, Susanne, Merkel, Maik, Weinhold, Kay, Casans, Andrea, Casquero-Vera, Juan Andrés, Gómez-Moreno, Francisco J., Artíñano, Begoña, Gini, Maria, Diapouli, Evangelia, Crumeyrolle, Suzanne, Riffault, Véronique, Petit, Jean-Eudes, Favez, Olivier, Putaud, Jean-Philippe, Santos, Sebastiao Martins Dos, Timonen, Hilkka, Aalto, Pasi P., Hussein, Tareq, Lampilahti, Janne, Hopke, Philip K., Wiedensohler, Alfred, Harrison, Roy M., Petäjä, Tuukka, Pandolfi, Marco, Alastuey, Andrés, and Querol, Xavier
- Abstract
This study aims to picture the phenomenology of urban ambient total lung deposited surface area (LDSA) (including head/throat (HA), tracheobronchial (TB), and alveolar (ALV) regions) based on multiple path particle dosimetry (MPPD) model during 2017-2019 period collected from urban background (UB, n = 15), traffic (TR, n = 6), suburban background (SUB, n = 4), and regional background (RB, n = 1) monitoring sites in Europe (25) and USA (1). Briefly, the spatial-temporal distribution characteristics of the deposition of LDSA, including diel, weekly, and seasonal patterns, were analyzed. Then, the relationship between LDSA and other air quality metrics at each monitoring site was investigated. The result showed that the peak concentrations of LDSA at UB and TR sites are commonly observed in the morning (06:00-8:00 UTC) and late evening (19:00-22:00 UTC), coinciding with traffic rush hours, biomass burning, and atmospheric stagnation periods. The only LDSA night-time peaks are observed on weekends. Due to the variability of emission sources and meteorology, the seasonal variability of the LDSA concentration revealed significant differences (p = 0.01) between the four seasons at all monitoring sites. Meanwhile, the correlations of LDSA with other pollutant metrics suggested that Aitken and accumulation mode particles play a significant role in the total LDSA concentration. The results also indicated that the main proportion of total LDSA is attributed to the ALV fraction (50 %), followed by the TB (34 %) and HA (16 %). Overall, this study provides valuable information of LDSA as a predictor in epidemiological studies and for the first time presenting total LDSA in a variety of European urban environments.
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- 2023
47. Ambient air particulate total lung deposited surface area (LDSA) levels in urban Europe
- Author
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Universitat Politècnica de Catalunya. Doctorat en Recursos Naturals i Medi Ambient, Liu, Xiansheng, Hadiatullah, Hadiatullah, Zhang, Xun, Trechera Ruiz, Pedro, Savadkoohi, Marjan, Garcia Marlès, Meritxell, Reche, Cristina, Perez Lozano, Noemi, Beddows, David, Salma, Imre, Thén, Wanda, Kalkavouras, Panayiotis, Universitat Politècnica de Catalunya. Doctorat en Recursos Naturals i Medi Ambient, Liu, Xiansheng, Hadiatullah, Hadiatullah, Zhang, Xun, Trechera Ruiz, Pedro, Savadkoohi, Marjan, Garcia Marlès, Meritxell, Reche, Cristina, Perez Lozano, Noemi, Beddows, David, Salma, Imre, Thén, Wanda, and Kalkavouras, Panayiotis
- Abstract
This study aims to picture the phenomenology of urban ambient total lung deposited surface area (LDSA) (including head/throat (HA), tracheobronchial (TB), and alveolar (ALV) regions) based on multiple path particle dosimetry (MPPD) model during 2017–2019 period collected from urban background (UB, n = 15), traffic (TR, n = 6), suburban background (SUB, n = 4), and regional background (RB, n = 1) monitoring sites in Europe (25) and USA (1). Briefly, the spatial-temporal distribution characteristics of the deposition of LDSA, including diel, weekly, and seasonal patterns, were analyzed. Then, the relationship between LDSA and other air quality metrics at each monitoring site was investigated. The result showed that the peak concentrations of LDSA at UB and TR sites are commonly observed in the morning (06:00–8:00 UTC) and late evening (19:00–22:00 UTC), coinciding with traffic rush hours, biomass burning, and atmospheric stagnation periods. The only LDSA night-time peaks are observed on weekends. Due to the variability of emission sources and meteorology, the seasonal variability of the LDSA concentration revealed significant differences (p = 0.01) between the four seasons at all monitoring sites. Meanwhile, the correlations of LDSA with other pollutant metrics suggested that Aitken and accumulation mode particles play a significant role in the total LDSA concentration. The results also indicated that the main proportion of total LDSA is attributed to the ALV fraction (50 %), followed by the TB (34 %) and HA (16 %). Overall, this study provides valuable information of LDSA as a predictor in epidemiological studies and for the first time presenting total LDSA in a variety of European urban environments., Peer Reviewed, Postprint (published version)
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- 2023
48. The variability of mass concentrations and source apportionment analysis of equivalent black carbon across urban Europe
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European Commission, Savadkoohi, Marjan, Pandolfi, Marco, Reche, Cristina, Niemi, Jarkko V., Mooibroek, Dennis, Titos, Gloria, Green, David C., Tremper, Anja H., Hueglin, Christoph, Liakakou, Eleni, Mihalopoulos, Nikos, Stavroulas, Iasonas, Artiñano, Begoña, Coz, Esther, Alados-Arboledas, Lucas, Beddows, David, Riffault, Véronique, De Brito, Joel F., Bastian, Susanne, Baudic, Alexia, Colombi, Cristina, Costabile, Francesca, Chazeau, Benjamin, Marchand, Nicolas, Gómez-Amo, José Luis, Estellés, Víctor, Matos, Violeta, van der Gaag, Ed, Gille, Grégory, Luoma, Krista, Manninen, Hanna E., Norman, Michael, Silvergren, Sanna, Petit, Jean-Eudes, Putaud, Jean-Philippe, Rattigan, Oliver V., Timonen, Hilkka, Tuch, Thomas, Merkel, Maik, Weinhold, Kay, Vratolis, Stergios, Vasilescu, Jeni, Favez, Olivier, Harrison, Roy M., Laj, Paolo, Wiedensohler, Alfred, Hopke, Philip K., Petäjä, Tuukka, Alastuey, Andrés, Querol, Xavier, European Commission, Savadkoohi, Marjan, Pandolfi, Marco, Reche, Cristina, Niemi, Jarkko V., Mooibroek, Dennis, Titos, Gloria, Green, David C., Tremper, Anja H., Hueglin, Christoph, Liakakou, Eleni, Mihalopoulos, Nikos, Stavroulas, Iasonas, Artiñano, Begoña, Coz, Esther, Alados-Arboledas, Lucas, Beddows, David, Riffault, Véronique, De Brito, Joel F., Bastian, Susanne, Baudic, Alexia, Colombi, Cristina, Costabile, Francesca, Chazeau, Benjamin, Marchand, Nicolas, Gómez-Amo, José Luis, Estellés, Víctor, Matos, Violeta, van der Gaag, Ed, Gille, Grégory, Luoma, Krista, Manninen, Hanna E., Norman, Michael, Silvergren, Sanna, Petit, Jean-Eudes, Putaud, Jean-Philippe, Rattigan, Oliver V., Timonen, Hilkka, Tuch, Thomas, Merkel, Maik, Weinhold, Kay, Vratolis, Stergios, Vasilescu, Jeni, Favez, Olivier, Harrison, Roy M., Laj, Paolo, Wiedensohler, Alfred, Hopke, Philip K., Petäjä, Tuukka, Alastuey, Andrés, and Querol, Xavier
- Abstract
This study analyzed the variability of equivalent black carbon (eBC) mass concentrations and their sources in urban Europe to provide insights into the use of eBC as an advanced air quality (AQ) parameter for AQ standards. This study compiled eBC mass concentration datasets covering the period between 2006 and 2022 from 50 measurement stations, including 23 urban background (UB), 18 traffic (TR), 7 suburban (SUB), and 2 regional background (RB) sites. The results highlighted the need for the harmonization of eBC measurements to allow for direct comparisons between eBC mass concentrations measured across urban Europe. The eBC mass concentrations exhibited a decreasing trend as follows: TR > UB > SUB > RB. Furthermore, a clear decreasing trend in eBC concentrations was observed in the UB sites moving from Southern to Northern Europe. The eBC mass concentrations exhibited significant spatiotemporal heterogeneity, including marked differences in eBC mass concentration and variable contributions of pollution sources to bulk eBC between different cities. Seasonal patterns in eBC concentrations were also evident, with higher winter concentrations observed in a large proportion of cities, especially at UB and SUB sites. The contribution of eBC from fossil fuel combustion, mostly traffic (eBCT) was higher than that of residential and commercial sources (eBCRC) in all European sites studied. Nevertheless, eBCRC still had a substantial contribution to total eBC mass concentrations at a majority of the sites. eBC trend analysis revealed decreasing trends for eBCT over the last decade, while eBCRC remained relatively constant or even increased slightly in some cities.
- Published
- 2023
49. Collective geographical ecoregions and precursor sources driving Arctic new particle formation
- Author
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Ministerio de Ciencia, Innovación y Universidades (España), Ministerio de Economía y Competitividad (España), Natural Environment Research Council (UK), National Centre for Atmospheric Science (UK), CSIC - Unidad de Recursos de Información Científica para la Investigación (URICI), Agencia Estatal de Investigación (España), Brean, James, Beddows, David C. S., Harrison, Roy M., Song, Congbo, Tunved, Peter, Strom, Johan, Krejci, Radovan, Freud, Eyal, Massling, Andreas, Skov, Henrik, Asmi, Eija, Lupi, Angelo, Dall'Osto, Manuel, Ministerio de Ciencia, Innovación y Universidades (España), Ministerio de Economía y Competitividad (España), Natural Environment Research Council (UK), National Centre for Atmospheric Science (UK), CSIC - Unidad de Recursos de Información Científica para la Investigación (URICI), Agencia Estatal de Investigación (España), Brean, James, Beddows, David C. S., Harrison, Roy M., Song, Congbo, Tunved, Peter, Strom, Johan, Krejci, Radovan, Freud, Eyal, Massling, Andreas, Skov, Henrik, Asmi, Eija, Lupi, Angelo, and Dall'Osto, Manuel
- Abstract
The Arctic is a rapidly changing ecosystem, with complex ice–ocean–atmosphere feedbacks. An important process is new particle formation (NPF), from gas-phase precursors, which provides a climate forcing effect. NPF has been studied comprehensively at different sites in the Arctic, ranging from those in the High Arctic and those at Svalbard to those in the continental Arctic, but no harmonised analysis has been performed on all sites simultaneously, with no calculations of key NPF parameters available for some sites. Here, we analyse the formation and growth of new particles from six long-term ground-based stations in the Arctic (Alert, Villum, Tiksi, Zeppelin Mountain, Gruvebadet, and Utqiaġvik). Our analysis of particle formation and growth rates in addition to back-trajectory analysis shows a summertime maxima in the frequency of NPF and particle formation rate at all sites, although the mean frequency and particle formation rates themselves vary greatly between sites, with the highest at Svalbard and lowest in the High Arctic. The summertime growth rate, condensational sinks, and vapour source rates show a slight bias towards the southernmost sites, with vapour source rates varying by around an order of magnitude between the northernmost and southernmost sites. Air masses back-trajectories during NPF at these northernmost sites are associated with large areas of sea ice and snow, whereas events at Svalbard are associated with more sea ice and ocean regions. Events at the southernmost sites are associated with large areas of land and sea ice. These results emphasise how understanding the geographical variation in surface type across the Arctic is key to understanding secondary aerosol sources and providing a harmonised analysis of NPF across the Arctic
- Published
- 2023
50. A full year of aerosol size distribution data from the central Arctic under an extreme positive Arctic Oscillation: insights from the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition
- Author
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European Commission, Academy of Finland, Department of Energy (US), Swiss Polar Institute, Agencia Estatal de Investigación (España), Boyer, Matthew, Aliaga, Diego, Pernov, Jakob Boyd, Angot, Hélène, Quéléver, Lauriane L.J., Dada, Lubna, Heutte, Benjamin, Dall'Osto, Manuel, Beddows, David C. S., Brasseur, Zoé, Beck, Ivo, Bucci, Silvia, Duetsch, Marina, Stohl, Andreas, Laurila, Tiia, Asmi, Eija, Massling, Andreas, Thomas, Daniel Charles, Nøjgaard, Jacob Klenø, Chan, Tak, Sharma, Sangeeta, Tunved, Peter, Krejci, Radovan, Hansson, Hans-Christien, Bianchi, Federico, Lehtipalo, Katrianne, Wiedensohler, Alfred, Weinhold, Kay, Kulmala, Markku, Petäjä, Tuukka, Sipilä, Mikko, Schmale, Julia, Jokinen, Tuija, European Commission, Academy of Finland, Department of Energy (US), Swiss Polar Institute, Agencia Estatal de Investigación (España), Boyer, Matthew, Aliaga, Diego, Pernov, Jakob Boyd, Angot, Hélène, Quéléver, Lauriane L.J., Dada, Lubna, Heutte, Benjamin, Dall'Osto, Manuel, Beddows, David C. S., Brasseur, Zoé, Beck, Ivo, Bucci, Silvia, Duetsch, Marina, Stohl, Andreas, Laurila, Tiia, Asmi, Eija, Massling, Andreas, Thomas, Daniel Charles, Nøjgaard, Jacob Klenø, Chan, Tak, Sharma, Sangeeta, Tunved, Peter, Krejci, Radovan, Hansson, Hans-Christien, Bianchi, Federico, Lehtipalo, Katrianne, Wiedensohler, Alfred, Weinhold, Kay, Kulmala, Markku, Petäjä, Tuukka, Sipilä, Mikko, Schmale, Julia, and Jokinen, Tuija
- Abstract
The Arctic environment is rapidly changing due to accelerated warming in the region. The warming trend is driving a decline in sea ice extent, which thereby enhances feedback loops in the surface energy budget in the Arctic. Arctic aerosols play an important role in the radiative balance and hence the climate response in the region, yet direct observations of aerosols over the Arctic Ocean are limited. In this study, we investigate the annual cycle in the aerosol particle number size distribution (PNSD), particle number concentration (PNC), and black carbon (BC) mass concentration in the central Arctic during the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition. This is the first continuous, year-long data set of aerosol PNSD ever collected over the sea ice in the central Arctic Ocean. We use a k-means cluster analysis, FLEXPART simulations, and inverse modeling to evaluate seasonal patterns and the influence of different source regions on the Arctic aerosol population. Furthermore, we compare the aerosol observations to land-based sites across the Arctic, using both long-term measurements and observations during the year of the MOSAiC expedition (2019–2020), to investigate interannual variability and to give context to the aerosol characteristics from within the central Arctic. Our analysis identifies that, overall, the central Arctic exhibits typical seasonal patterns of aerosols, including anthropogenic influence from Arctic haze in winter and secondary aerosol processes in summer. The seasonal pattern corresponds to the global radiation, surface air temperature, and timing of sea ice melting/freezing, which drive changes in transport patterns and secondary aerosol processes. In winter, the Norilsk region in Russia/Siberia was the dominant source of Arctic haze signals in the PNSD and BC observations, which contributed to higher accumulation-mode PNC and BC mass concentrations in the central Arctic than at land-based obse
- Published
- 2023
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