Search

Your search keyword '"Grivas, Georgios"' showing total 8 results
Start Over Author "Grivas, Georgios" Journal atmosphere
8 results on '"Grivas, Georgios"'

2. Online Chemical Characterization and Sources of Submicron Aerosol in the Major Mediterranean Port City of Piraeus, Greece

Author

Stavroulas, Iasonas, primary, Grivas, Georgios, additional, Liakakou, Eleni, additional, Kalkavouras, Panayiotis, additional, Bougiatioti, Aikaterini, additional, Kaskaoutis, Dimitris G., additional, Lianou, Maria, additional, Papoutsidaki, Kyriaki, additional, Tsagkaraki, Maria, additional, Zarmpas, Pavlos, additional, Gerasopoulos, Evangelos, additional, and Mihalopoulos, Nikolaos, additional

Published
2021
Full Text
View/download PDF

4. Assessment of the COVID-19 Lockdown Effects on Spectral Aerosol Scattering and Absorption Properties in Athens, Greece

Author

Kaskaoutis, Dimitris G., primary, Grivas, Georgios, additional, Liakakou, Eleni, additional, Kalivitis, Nikos, additional, Kouvarakis, Giorgos, additional, Stavroulas, Iasonas, additional, Kalkavouras, Panayiotis, additional, Zarmpas, Pavlos, additional, Dumka, Umesh Chandra, additional, Gerasopoulos, Evangelos, additional, and Mihalopoulos, Nikolaos, additional

Published
2021
Full Text
View/download PDF

5. Integrating in situ Measurements and City Scale Modelling to Assess the COVID–19 Lockdown Effects on Emissions and Air Quality in Athens, Greece

Author

Grivas, Georgios, primary, Athanasopoulou, Eleni, additional, Kakouri, Anastasia, additional, Bailey, Jennifer, additional, Liakakou, Eleni, additional, Stavroulas, Iasonas, additional, Kalkavouras, Panayiotis, additional, Bougiatioti, Aikaterini, additional, Kaskaoutis, Dimitris, additional, Ramonet, Michel, additional, Mihalopoulos, Nikolaos, additional, and Gerasopoulos, Evangelos, additional

Published
2020
Full Text
View/download PDF

6. Field Evaluation of Low-Cost PM Sensors (Purple Air PA-II) Under Variable Urban Air Quality Conditions, in Greece

Author

Stavroulas, Iasonas, primary, Grivas, Georgios, additional, Michalopoulos, Panagiotis, additional, Liakakou, Eleni, additional, Bougiatioti, Aikaterini, additional, Kalkavouras, Panayiotis, additional, Fameli, Kyriaki, additional, Hatzianastassiou, Nikolaos, additional, Mihalopoulos, Nikolaos, additional, and Gerasopoulos, Evangelos, additional

Published
2020
Full Text
View/download PDF

7. Carbonaceous Aerosols in Contrasting Atmospheric Environments in Greek Cities: Evaluation of the EC-tracer Methods for Secondary Organic Carbon Estimation

Author

Kaskaoutis, Dimitris G., primary, Grivas, Georgios, additional, Theodosi, Christina, additional, Tsagkaraki, Maria, additional, Paraskevopoulou, Despina, additional, Stavroulas, Iasonas, additional, Liakakou, Eleni, additional, Gkikas, Antonis, additional, Hatzianastassiou, Nikolaos, additional, Wu, Cheng, additional, Gerasopoulos, Evangelos, additional, and Mihalopoulos, Nikolaos, additional

Published
2020
Full Text
View/download PDF

8. High-Resolution Measurements of SO 2 , HNO 3 and HCl at the Urban Environment of Athens, Greece: Levels, Variability and Gas to Particle Partitioning.

Author

Liakakou, Eleni, Fourtziou, Luciana, Paraskevopoulou, Despina, Speyer, Orestis, Lianou, Maria, Grivas, Georgios, Myriokefalitakis, Stelios, and Mihalopoulos, Nikolaos

Subjects
URBAN ecology (Sociology), BIOMASS burning, CHLORIDE ions, CARBONACEOUS aerosols, HYDROCHLORIC acid, ION pairs, SEA salt
Abstract

High-resolution measurements of sulfur dioxide (SO2), nitric acid (HNO3), and hydrochloric acid (HCl) were conducted in Athens, Greece, from 2014 to 2016 via a wet rotating annular denuder system paired with an ion chromatograph. Decreased mean annual levels of SO2 and HNO3 (equal to 3.3 ± 4.8 μg m−3 and 0.7 ± 0.6 μg m−3, respectively) were observed relative to the past, whereas for HCl (mean of 0.4 μg m−3) no such comparison was possible as the past measurements are very scarce. Regional and local emission sources regulated the SO2 levels and contributed to both the December and the July maxima of 6.6 μg m−3 and 5.5 μg m−3, respectively. Similarly, the significant enhancement at noon and during the winter nighttime was due to transported SO2 and residential heating, respectively. The oxidation of NO2 by OH radicals and the heterogeneous reactions of HNO3 on sea salt seemed to drive the HNO3 and HCl formation, respectively, whereas nighttime biomass burning affected only the former by almost 50%. During summer, the sulfate anions dominated over the SO2, in contrast to the chloride and nitrate ions that prevailed during the winter and were linked to the aerosol acidity that influences their lifetime as well as their impact on ecosystems. [ABSTRACT FROM AUTHOR]

Published
2022
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results