Search

Your search keyword '"Guo, Yishuo"' showing total 100 results
Start Over Author "Guo, Yishuo"
100 results on '"Guo, Yishuo"'

1. Increasing contribution of nighttime nitrogen chemistry to wintertime haze formation in Beijing observed during COVID-19 lockdowns

Author

Yan, Chao, Tham, Yee Jun, Nie, Wei, Xia, Men, Wang, Haichao, Guo, Yishuo, Ma, Wei, Zhan, Junlei, Hua, Chenjie, Li, Yuanyuan, Deng, Chenjuan, Li, Yiran, Zheng, Feixue, Chen, Xin, Li, Qinyi, Zhang, Gen, Mahajan, Anoop S., Cuevas, Carlos A., Huang, Dan Dan, Wang, Zhe, Sun, Yele, Saiz-Lopez, Alfonso, Bianchi, Federico, Kerminen, Veli-Matti, Worsnop, Douglas R., Donahue, Neil M., Jiang, Jingkun, Liu, Yongchun, Ding, Aijun, and Kulmala, Markku

Published
2023
Full Text
View/download PDF

2. Secondary organic aerosol formed by condensing anthropogenic vapours over China’s megacities

Author

Nie, Wei, Yan, Chao, Huang, Dan Dan, Wang, Zhe, Liu, Yuliang, Qiao, Xiaohui, Guo, Yishuo, Tian, Linhui, Zheng, Penggang, Xu, Zhengning, Li, Yuanyuan, Xu, Zheng, Qi, Ximeng, Sun, Peng, Wang, Jiaping, Zheng, Feixue, Li, Xiaoxiao, Yin, Rujing, Dallenbach, Kaspar R., Bianchi, Federico, Petäjä, Tuukka, Zhang, Yanjun, Wang, Mingyi, Schervish, Meredith, Wang, Sainan, Qiao, Liping, Wang, Qian, Zhou, Min, Wang, Hongli, Yu, Chuan, Yao, Dawen, Guo, Hai, Ye, Penglin, Lee, Shuncheng, Li, Yong Jie, Liu, Yongchun, Chi, Xuguang, Kerminen, Veli-Matti, Ehn, Mikael, Donahue, Neil M., Wang, Tao, Huang, Cheng, Kulmala, Markku, Worsnop, Douglas, Jiang, Jingkun, and Ding, Aijun

Published
2022
Full Text
View/download PDF

3. The Significant Role of New Particle Composition and Morphology on the HNO3-Driven Growth of Particles down to Sub-10 nm

Author

Li, Yuyang, primary, Li, Xiaoxiao, additional, Cai, Runlong, additional, Yan, Chao, additional, Zheng, Guangjie, additional, Li, Yiran, additional, Chen, Yijing, additional, Zhang, Yusheng, additional, Guo, Yishuo, additional, Hua, Chenjie, additional, Kerminen, Veli-Matti, additional, Liu, Yongchun, additional, Kulmala, Markku, additional, Hao, Jiming, additional, Smith, James N., additional, and Jiang, Jingkun, additional

Published
2024
Full Text
View/download PDF

5. Observations and Modeling of Gaseous Nitrated Phenols in Urban Beijing: Insights From Seasonal Comparison and Budget Analysis

Author

Xia, Men, primary, Chen, Xin, additional, Ma, Wei, additional, Guo, Yishuo, additional, Yin, Rujing, additional, Zhan, Junlei, additional, Zhang, Yusheng, additional, Wang, Zongcheng, additional, Zheng, Feixue, additional, Xie, Jiali, additional, Wang, Yuzheng, additional, Hua, Chenjie, additional, Liu, Yongchun, additional, Yan, Chao, additional, and Kulmala, Markku, additional

Published
2023
Full Text
View/download PDF

6. Comprehensive simulations of new particle formation events in Beijing with a cluster dynamics–multicomponent sectional model

Author

Li, Chenxi, primary, Li, Yuyang, additional, Li, Xiaoxiao, additional, Cai, Runlong, additional, Fan, Yaxin, additional, Qiao, Xiaohui, additional, Yin, Rujing, additional, Yan, Chao, additional, Guo, Yishuo, additional, Liu, Yongchun, additional, Zheng, Jun, additional, Kerminen, Veli-Matti, additional, Kulmala, Markku, additional, Xiao, Huayun, additional, and Jiang, Jingkun, additional

Published
2023
Full Text
View/download PDF

7. Iodine oxoacids and their roles in sub-3 nm particle growth in polluted urban environments.

Author

Zhang, Ying, Li, Duzitian, He, Xu-Cheng, Nie, Wei, Deng, Chenjuan, Cai, Runlong, Liu, Yuliang, Guo, Yishuo, Liu, Chong, Li, Yiran, Chen, Liangduo, Li, Yuanyuan, Hua, Chenjie, Liu, Tingyu, Wang, Zongcheng, Xie, Jiali, Wang, Lei, Petäjä, Tuukka, Bianchi, Federico, and Qi, Ximeng

Subjects
IODINE, ATMOSPHERIC temperature, INORGANIC acids, SOLAR radiation, CITIES & towns, ATMOSPHERIC oxygen
Abstract

New particle formation contributes significantly to the number concentration of ultrafine particles (UFPs, d ≤ 100 nm) and has a great impact on human health and global climate. Iodine oxoacids (HIO x , including iodic acid, HIO 3 , and iodous acid, HIO 2) have been observed in pristine regions and proved to dominate new particle formation (NPF) at some sites. However, the knowledge of HIO x in polluted urban areas is rather limited. Here, we conducted a long-term measurements of gaseous iodine oxoacids and sulfuric acid in Beijing from January 2019 to October 2021 and also in Nanjing from March 2019 to February 2020 and investigated the contribution of HIO x to UFP number concentration in both urban environments. HIO 3 is highest in summer, up to 2.85 × 10 6 and 2.78 × 10 6 cm -3 in Beijing and Nanjing, respectively, and is lowest in winter by 96 % and 75 %, respectively. HIO 3 exhibits more prominent variation than H 2 SO 4 in both urban sites. HIO 3 concentration shows a clear diurnal pattern at both sites with a daily maximum at around noontime, similar to the atmospheric temperature, solar radiation, and ozone (O 3) levels. HIO 2 concentration has the same diurnal and seasonal trend as HIO 3 but is overall about an order of magnitude lower than HIO 3 concentration. Back trajectory analysis suggests that the sources for inland iodine species could be a mix of marine and terrestrial origins, with both having peak iodine emission in warm seasons. While the contribution of HIO 2 to particle growth is marginal in Beijing and Nanjing, our results demonstrate that HIO 3 enhances the particle survival probability of sub-3 nm particles by about 40 % (median) and occasionally by more than 100 % in NPF events, suggesting HIO x are significant contributor to UFPs in polluted urban areas. As the growth contribution from HIO 3 and H 2 SO 4 is similar on a per-molecule basis, we propose that the sum of HIO 3 and H 2 SO 4 could be used to estimate sub-3 nm particle growth of inorganic acid origin in polluted atmospheres with a significant amount of HIO x. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

8. Measurement report: The 4-year variability and influence of the Winter Olympics and other special events on air quality in urban Beijing during wintertime

Author

Guo, Yishuo, Deng, Chenjuan, Ovaska, Aino, Zheng, Feixue, Hua, Chenjie, Zhan, Junlei, Li, Yiran, Wu, Jin, Wang, Zongcheng, Xie, Jiali, Zhang, Ying, Liu, Tingyu, Zhang, Yusheng, Song, Boying, Ma, Wei, Liu, Yongchun, Yan, Chao, Jiang, Jingkun, Kerminen, Veli-Matti, Xia, Men, Nieminen, Tuomo, Du, Wei, Kokkonen, Tom, and Kulmala, Markku

Abstract

Comprehensive measurements are vital to obtain big enough datasets for better understanding the complex atmosphere and further improving the air quality. To investigate the 4-year variation of air quality and the influences of special events (Beijing Winter Olympics, COVID lockdown and Chinese New Year) on it during the wintertime in polluted urban air, we conducted comprehensive observations in Beijing, China, during 1 January–20 February, in the years from 2019 to 2022. The mass concentration of PM2.5 and its composition (organics, nitrate, sulfate, ammonium, chloride and black carbon) and the number size distributions of particles (down to ∼1 nm) and ions, gaseous pollutants (CO, NOx, SO2, O3) and condensable vapors (sulfuric acid and oxygenated organic molecules), as well as meteorological parameters, were simultaneously measured. The days before 22 January without any special events in each year were selected to investigate the 4-year variability of air quality. We found that the concentrations of CO, NOx, total oxygenated organic molecules (OOMs), total PM2.5, organics, chloride and black carbon and the number concentration of sub-3 nm particles (N1.3−3) showed similar variations, decreasing from 2019 to 2021 and then increasing in 2022. For SO2, however, its concentration decreased year by year due to the significant emission reduction, further leading to the decrease of gaseous sulfuric acid and particulate sulfate from 2019 to 2022. O3 concentration showed an opposite 4-year variation compared with NOx. Meanwhile, both the oxygen and nitrogen contents of oxygenated organic molecules increased year by year, implying that not only the oxidation state of those compounds increased, but also NOx was involved more efficiently in their formation processes. With higher sulfuric acid concentrations and new particle formation (NPF) frequencies in 2021 than in 2022, and with the lowest concentrations of background aerosols and the lowest ambient temperatures in 2021, N1.3−3 was still the lowest in 2021. Unlike N1.3−3, the ion concentrations in both 0.8–2 and 2–4 nm size ranges were higher in 2021 than in the other years. Then, the days after 4 February were chosen to explore the influence of special events. The non-event days within this date range in 2019 and 2021 were chosen as the reference period. Due to the favorable meteorological conditions together with reductions in anthropogenic emissions, there were basically no haze events during the Olympics. Therefore, CO, NOx, SO2, total OOMs, accumulation-mode particles (N100−1000), and total PM2.5 and its composition were much lower, while ion concentrations were much higher compared with the reference period. Although there was also emission reduction during COVID, especially for NOx, the enhancement of secondary inorganic aerosol formation, together with unfavorable meteorological conditions, caused severe haze events during this period. Hence, CO, total OOMs and all PM2.5 compositions during COVID increased dramatically compared with the reference period. Influenced by SO2, condensation sink and sunlight, sulfuric acid concentration was found to be comparable between the Olympics and the reference period but was lower during COVID and Chinese New Year. Additionally, N1.3−3 was almost at the same level during different periods, indicating that the special events only had little impact on the NPF processes. These results provide useful information to the development of more targeted pollution control plans.

Published
2023

9. Molecular Characterization of Oxygenated Organic Molecules and Their Dominating Roles in Particle Growth in Hong Kong

Author

Zheng, Penggang, primary, Chen, Yi, additional, Wang, Zhe, additional, Liu, Yuliang, additional, Pu, Wei, additional, Yu, Chuan, additional, Xia, Men, additional, Xu, Yang, additional, Guo, Jia, additional, Guo, Yishuo, additional, Tian, Linhui, additional, Qiao, Xiaohui, additional, Huang, Dan Dan, additional, Yan, Chao, additional, Nie, Wei, additional, Worsnop, Douglas R., additional, Lee, Shuncheng, additional, and Wang, Tao, additional

Published
2023
Full Text
View/download PDF

11. Supplementary material to "Iodine oxoacids and their roles in sub-3 nanometer particle growth in polluted urban environments"

Author

Zhang, Ying, primary, Li, Duzitian, additional, He, Xu-Cheng, additional, Nie, Wei, additional, Deng, Chenjuan, additional, Cai, Runlong, additional, Liu, Yuliang, additional, Guo, Yishuo, additional, Liu, Chong, additional, Li, Yiran, additional, Chen, Liangduo, additional, Li, Yuanyuan, additional, Hua, Chenjie, additional, Liu, Tingyu, additional, Wang, Zongcheng, additional, Wang, Lei, additional, Petäjä, Tuukka, additional, Bianchi, Federico, additional, Qi, Ximeng, additional, Chi, Xuguang, additional, Paasonen, Pauli, additional, Liu, Yongchun, additional, Yan, Chao, additional, Jiang, Jingkun, additional, Ding, Aijun, additional, and Kulmala, Markku, additional

Published
2023
Full Text
View/download PDF

12. Iodine oxoacids and their roles in sub-3 nanometer particle growth in polluted urban environments

Author

Zhang, Ying, primary, Li, Duzitian, additional, He, Xu-Cheng, additional, Nie, Wei, additional, Deng, Chenjuan, additional, Cai, Runlong, additional, Liu, Yuliang, additional, Guo, Yishuo, additional, Liu, Chong, additional, Li, Yiran, additional, Chen, Liangduo, additional, Li, Yuanyuan, additional, Hua, Chenjie, additional, Liu, Tingyu, additional, Wang, Zongcheng, additional, Wang, Lei, additional, Petäjä, Tuukka, additional, Bianchi, Federico, additional, Qi, Ximeng, additional, Chi, Xuguang, additional, Paasonen, Pauli, additional, Liu, Yongchun, additional, Yan, Chao, additional, Jiang, Jingkun, additional, Ding, Aijun, additional, and Kulmala, Markku, additional

Published
2023
Full Text
View/download PDF

13. Molecular Characterization of Oxygenated Organic Molecules and Their Dominating Roles in Particle Growth in Hong Kong

Author

Zheng, Penggang, Chen, Yi, Wang, Zhe, Liu, Yuliang, Pu, Wei, Yu, Chuan, Xia, Men, Xu, Yang, Guo, Jia, Guo, Yishuo, Tian, Linhui, Qiao, Xiaohui, Huang, Dan Dan, Yan, Chao, Nie, Wei, Worsnop, Douglas R., Lee, Shuncheng, Wang, Tao, Zheng, Penggang, Chen, Yi, Wang, Zhe, Liu, Yuliang, Pu, Wei, Yu, Chuan, Xia, Men, Xu, Yang, Guo, Jia, Guo, Yishuo, Tian, Linhui, Qiao, Xiaohui, Huang, Dan Dan, Yan, Chao, Nie, Wei, Worsnop, Douglas R., Lee, Shuncheng, and Wang, Tao

Abstract

Oxygenated organic molecules (OOMs) are critical inter-mediates linking volatile organic compound oxidation and secondary organic aerosol (SOA) formation. Yet, the understanding of OOM components, formation mechanism, and impacts are still limited, especially for urbanized regions with a cocktail of anthropogenic emissions. Herein, ambient measurements of OOMs were conducted at a regional background site in South China in 2018. The molecular characteristics of OOMs revealed dominant nitrogen-containing products, and the influences of different factors on OOM composition and oxidation state were elucidated. Positive matrix factorization analysis resolved the complex OOM species to factors featured with fingerprint species from different oxidation pathways. A new method was developed to identify the key functional groups of OOMs, which successfully classified the majority species into carbonyls (8%), hydroperoxides (7%), nitrates (17%), peroxyl nitrates (10%), dinitrates (13%), aromatic ring-retaining species (6%), and terpenes (7%). The volatility estimation of OOMs was improved based on their identified functional groups and was used to simulate the aerosol growth process contributed by the condensation of those low-volatile OOMs. The results demonstrate the predominant role of OOMs in contributing sub-100 nm particle growth and SOA formation and highlight the importance of dinitrates and anthropogenic products from multistep oxidation.

Published
2023

14. Underestimated Contribution of Heavy Aromatics to Secondary Organic Aerosol Revealed by Comparative Assessments Using New and Traditional Methods

Author

Tian, Linhui, Huang, Dan Dan, Wang, Qiongqiong, Zhu, Shuhui, Wang, Qian, Yan, Chao, Nie, Wei, Wang, Zhe, Qiao, Liping, Liu, Yuliang, Qiao, Xiaohui, Guo, Yishuo, Zheng, Penggang, Jing, Sheng'ao, Lou, Shengrong, Wang, Hongli, Yu, Jianzhen, Huang, Cheng, Li, Yong Jie, Tian, Linhui, Huang, Dan Dan, Wang, Qiongqiong, Zhu, Shuhui, Wang, Qian, Yan, Chao, Nie, Wei, Wang, Zhe, Qiao, Liping, Liu, Yuliang, Qiao, Xiaohui, Guo, Yishuo, Zheng, Penggang, Jing, Sheng'ao, Lou, Shengrong, Wang, Hongli, Yu, Jianzhen, Huang, Cheng, and Li, Yong Jie

Abstract

Oxygenated organic molecules (OOMs) from oxidation of volatile organic compounds (VOCs) are important contributors to secondary organic aerosol (SOA) formation. Recent field studies showed that anthropogenic precursors significantly contributed to OOMs and subsequent SOA formation in urban areas. We conducted collocated OOM measurements with nitrate-ion chemical ionization mass spectrometry and SOA molecular tracer measurements with thermal desorption aerosol gas chromatography-mass spectrometry in Shanghai. Using the newly developed OOM-based method, we found that OOMs derived from aromatic VOCs (aromatic OOMs) dominated the local SOA production with a contribution of 52%. The traditional SOA tracer-based method estimated a consistent fraction of 49% from monoaromatics and polyaromatics (e.g., naphthalene and methylnaphthalene). We further categorized the aromatic OOMs into heavy (carbon number: nC > 9) and light (nC = 6-9) ones primarily based on the ring number. Surprisingly, the contribution of heavy aromatic OOMs to SOA formation (25%) was more than twice of the naphthalene-derived SOA from the tracer-based method (10%). The gap could be explained by the fact that the OOM-based method also counted the contributions from other polyaromatic VOCs that are beyond methyl-/naphthalene. The high degrees of oxygenation caused by multistep oxidation and the higher carbon number (nC > 9) in heavy aromatic OOMs lead to their lower volatility and higher contributions to SOA. Our study provides previously unavailable linkage between the aromatic SOA with its precursors via simultaneous measurements of OOMs and molecular tracers, revealing the overlooked contribution from heavy aromatic VOCs to SOA formation.

Published
2023

15. Enigma of Urban Gaseous Oxygenated Organic Molecules: Precursor Type, Role of NOx, and Degree of Oxygenation

Author

Tian, Linhui, Huang, Dan Dan, Li, Yong Jie, Yan, Chao, Nie, Wei, Wang, Zhe, Wang, Qian, Qiao, Liping, Zhou, Min, Zhu, Shuhui, Liu, Yuliang, Guo, Yishuo, Qiao, Xiaohui, Zheng, Penggang, Jing, Sheng'ao, Lou, Shengrong, Wang, Hongli, Huang, Cheng, Tian, Linhui, Huang, Dan Dan, Li, Yong Jie, Yan, Chao, Nie, Wei, Wang, Zhe, Wang, Qian, Qiao, Liping, Zhou, Min, Zhu, Shuhui, Liu, Yuliang, Guo, Yishuo, Qiao, Xiaohui, Zheng, Penggang, Jing, Sheng'ao, Lou, Shengrong, Wang, Hongli, and Huang, Cheng

Abstract

Oxidation of volatile organic compounds (VOCs) forms oxygenated organic molecules (OOMs), which contribute to secondary pollution. Herein, we present measurement results of OOMs using chemical ionization mass spectrometry with nitrate as the reagent ion in Shanghai. Compared to those in forests and laboratory studies, OOMs detected at this urban site were of relatively lower degree of oxygenation. This was attributed to the high NOx concentrations (similar to 44 ppb), which overall showed a suppression on the propagation reactions. As another result, a large fraction of nitrogenous OOMs (75%) was observed, and this fraction further increased to 84% under a high NO/VOC ratio. By applying a novel framework on OOM categorization and supported by VOC measure-ments, 50 and 32% OOMs were attributed to aromatic and aliphatic precursors, respectively. Furthermore, aromatic OOMs are more oxygenated (effective oxygen number, nOeff = 4-6) than aliphatic ones (nOeff = 3-4), which can be partly explained by the difference in initiation mechanisms and points to possible discrimination in termination reactions. This study highlights the roles of NOx in OOM formation in urban areas, as well as the formation of nitrogenous products that might show discrimination between aromatic and aliphatic VOCs.

Published
2023

16. Increasing contribution of nighttime nitrogen chemistry to wintertime haze formation in Beijing observed during COVID-19 lockdowns

Author

National Natural Science Foundation of China, Academy of Finland, European Commission, Beijing University of Chemical Technology, Basic and Applied Basic Foundation of Guangdong Province, Consejo Superior de Investigaciones Científicas (España), Tsinghua University, National Science Foundation (US), Indian Institute of Tropical Meteorology, Ministry of Earth Sciences (India), German Federal Environmental Foundation, Yan, Chao [0000-0002-5735-9597], Tham, Yee Jun [0000-0001-7924-5841], Nie, Wei [0000-0002-6048-0515], Xia, Men [0000-0002-8534-3357], Wang, Haichao [0000-0001-6161-1874], Ma, Wei [0000-0001-8975-1764], Zhan, Junlei [0000-0002-5968-9370], Li, Yiran [0000-0001-7232-4969], Li, Qinyi [0000-0002-5146-5831], Mahajan, Anoop S. [0000-0002-2909-5432], Cuevas, Carlos A. [0000-0002-9251-5460], Wang, Zhe [0000-0002-5627-6562], Sun, Yele [0000-0003-2354-0221], Saiz-Lopez, A. [0000-0002-0060-1581], Bianchi, Federico [0000-0003-2996-3604], Kerminen, Veli Matti [0000-0002-0706-669X], Worsnop, Douglas R. [0000-0002-8928-8017], Donahue, Neil M. [0000-0003-3054-2364], Liu, Yongchun [0000-0002-9055-970X], Ding, Aijun [0000-0003-4481-5386], Kulmala, Markku [0000-0003-3464-7825], Yan, Chao, Tham, Yee Jun, Nie, Wei, Xia, Men, Wang, Haichao, Guo, Yishuo, Ma, Wei, Zhan, Junlei, Hua, Chenjie, Li, Yuanyuan, Deng, Chenjuan, Li, Yiran, Zheng, Feixue, Chen, Xin, Li, Qinyi, Zhang, Gen, Mahajan, Anoop S., Cuevas, Carlos A., Huang, Dan Dan, Wang, Zhe, Sun, Yele, Saiz-Lopez, A., Bianchi, Federico, Kerminen, Veli Matti, Worsnop, Douglas R., Donahue, Neil M., Jiang, Jingkun, Liu, Yongchun, Ding, Aijun, Kulmala, Markku, National Natural Science Foundation of China, Academy of Finland, European Commission, Beijing University of Chemical Technology, Basic and Applied Basic Foundation of Guangdong Province, Consejo Superior de Investigaciones Científicas (España), Tsinghua University, National Science Foundation (US), Indian Institute of Tropical Meteorology, Ministry of Earth Sciences (India), German Federal Environmental Foundation, Yan, Chao [0000-0002-5735-9597], Tham, Yee Jun [0000-0001-7924-5841], Nie, Wei [0000-0002-6048-0515], Xia, Men [0000-0002-8534-3357], Wang, Haichao [0000-0001-6161-1874], Ma, Wei [0000-0001-8975-1764], Zhan, Junlei [0000-0002-5968-9370], Li, Yiran [0000-0001-7232-4969], Li, Qinyi [0000-0002-5146-5831], Mahajan, Anoop S. [0000-0002-2909-5432], Cuevas, Carlos A. [0000-0002-9251-5460], Wang, Zhe [0000-0002-5627-6562], Sun, Yele [0000-0003-2354-0221], Saiz-Lopez, A. [0000-0002-0060-1581], Bianchi, Federico [0000-0003-2996-3604], Kerminen, Veli Matti [0000-0002-0706-669X], Worsnop, Douglas R. [0000-0002-8928-8017], Donahue, Neil M. [0000-0003-3054-2364], Liu, Yongchun [0000-0002-9055-970X], Ding, Aijun [0000-0003-4481-5386], Kulmala, Markku [0000-0003-3464-7825], Yan, Chao, Tham, Yee Jun, Nie, Wei, Xia, Men, Wang, Haichao, Guo, Yishuo, Ma, Wei, Zhan, Junlei, Hua, Chenjie, Li, Yuanyuan, Deng, Chenjuan, Li, Yiran, Zheng, Feixue, Chen, Xin, Li, Qinyi, Zhang, Gen, Mahajan, Anoop S., Cuevas, Carlos A., Huang, Dan Dan, Wang, Zhe, Sun, Yele, Saiz-Lopez, A., Bianchi, Federico, Kerminen, Veli Matti, Worsnop, Douglas R., Donahue, Neil M., Jiang, Jingkun, Liu, Yongchun, Ding, Aijun, and Kulmala, Markku

Abstract

Nitrate comprises the largest fraction of fine particulate matter in China during severe haze. Consequently, strict control of nitrogen oxides (NOx) emissions has been regarded as an effective measure to combat air pollution. However, this notion is challenged by the persistent severe haze pollution observed during the COVID-19 lockdown when NOx levels substantially declined. Here we present direct field evidence that diminished nitrogen monoxide (NO) during the lockdown activated nocturnal nitrogen chemistry, driving severe haze formation. First, dinitrogen pentoxide (N2O5) heterogeneous reactions dominate particulate nitrate (pNO3−) formation during severe pollution, explaining the higher-than-normal pNO3− fraction in fine particulate matter despite the substantial NOx reduction. Second, N2O5 heterogeneous reactions provide a large source of chlorine radicals on the following day, contributing drastically to the oxidation of volatile organic compounds, and thus the formation of oxygenated organic molecules and secondary organic aerosol. Our findings highlight the increasing importance of such nocturnal nitrogen chemistry in haze formation caused by NOx reduction, motivating refinements to future air pollution control strategies.

Published
2023

18. Supplementary material to "Comprehensive simulations of new particle formation events in Beijing with a cluster dynamics-multicomponent sectional model"

Author

Li, Chenxi, primary, Li, Yuyang, additional, Li, Xiaoxiao, additional, Cai, Runlong, additional, Fan, Yaxin, additional, Qiao, Xiaohui, additional, Yin, Rujing, additional, Yan, Chao, additional, Guo, Yishuo, additional, Liu, Yongchun, additional, Zheng, Jun, additional, Kerminen, Veli-Matti, additional, Kulmala, Markku, additional, Xiao, Huayun, additional, and Jiang, Jingkun, additional

Published
2023
Full Text
View/download PDF

19. Precursor apportionment of atmospheric oxygenated organic molecules using a machine learning method

Author

Qiao, Xiaohui, primary, Li, Xiaoxiao, additional, Yan, Chao, additional, Sarnela, Nina, additional, Yin, Rujing, additional, Guo, Yishuo, additional, Yao, Lei, additional, Nie, Wei, additional, Huang, Dandan, additional, Wang, Zhe, additional, Bianchi, Federico, additional, Liu, Yongchun, additional, Donahue, Neil M., additional, Kulmala, Markku, additional, and Jiang, Jingkun, additional

Published
2023
Full Text
View/download PDF

20. Underestimated Contribution of Heavy Aromatics to Secondary Organic Aerosol Revealed by Comparative Assessments Using New and Traditional Methods

Author

Tian, Linhui, primary, Huang, Dan Dan, additional, Wang, Qiongqiong, additional, Zhu, Shuhui, additional, Wang, Qian, additional, Yan, Chao, additional, Nie, Wei, additional, Wang, Zhe, additional, Qiao, Liping, additional, Liu, Yuliang, additional, Qiao, Xiaohui, additional, Guo, Yishuo, additional, Zheng, Penggang, additional, Jing, Sheng’ao, additional, Lou, Shengrong, additional, Wang, Hongli, additional, Yu, Jian Zhen, additional, Huang, Cheng, additional, and Li, Yong Jie, additional

Published
2022
Full Text
View/download PDF

21. Enigma of Urban Gaseous Oxygenated Organic Molecules: Precursor Type, Role of NOx, and Degree of Oxygenation

Author

Tian, Linhui, primary, Huang, Dan Dan, additional, Li, Yong Jie, additional, Yan, Chao, additional, Nie, Wei, additional, Wang, Zhe, additional, Wang, Qian, additional, Qiao, Liping, additional, Zhou, Min, additional, Zhu, Shuhui, additional, Liu, Yuliang, additional, Guo, Yishuo, additional, Qiao, Xiaohui, additional, Zheng, Penggang, additional, Jing, Sheng’ao, additional, Lou, Shengrong, additional, Wang, Hongli, additional, and Huang, Cheng, additional

Published
2022
Full Text
View/download PDF

22. Supplementary material to "Measurement Report: Year-to-year Variability and Influence of Winter Olympics and other Special Events on Air Quality in Urban Beijing during Wintertime"

Author

Guo, Yishuo, primary, Deng, Chenjuan, additional, Ovaska, Aino, additional, Zheng, Feixue, additional, Hua, Chenjie, additional, Zhan, Junlei, additional, Li, Yiran, additional, Wu, Jin, additional, Wang, Zongcheng, additional, Xie, Jiali, additional, Zhang, Ying, additional, Liu, Tingyu, additional, Zhang, Yusheng, additional, Song, Boying, additional, Ma, Wei, additional, Liu, Yongchun, additional, Yan, Chao, additional, Jiang, Jingkun, additional, Kerminen, Veli-Matti, additional, Xia, Men, additional, Nieminen, Tuomo, additional, Du, Wei, additional, Kokkonen, Tom, additional, and Kulmala, Markku, additional

Published
2022
Full Text
View/download PDF

23. Measurement Report: Year-to-year Variability and Influence of Winter Olympics and other Special Events on Air Quality in Urban Beijing during Wintertime

Author

Guo, Yishuo, primary, Deng, Chenjuan, additional, Ovaska, Aino, additional, Zheng, Feixue, additional, Hua, Chenjie, additional, Zhan, Junlei, additional, Li, Yiran, additional, Wu, Jin, additional, Wang, Zongcheng, additional, Xie, Jiali, additional, Zhang, Ying, additional, Liu, Tingyu, additional, Zhang, Yusheng, additional, Song, Boying, additional, Ma, Wei, additional, Liu, Yongchun, additional, Yan, Chao, additional, Jiang, Jingkun, additional, Kerminen, Veli-Matti, additional, Xia, Men, additional, Nieminen, Tuomo, additional, Du, Wei, additional, Kokkonen, Tom, additional, and Kulmala, Markku, additional

Published
2022
Full Text
View/download PDF

24. The effect of COVID-19 restrictions on atmospheric new particle formation in Beijing

Author

Yan, Chao, primary, Shen, Yicheng, additional, Stolzenburg, Dominik, additional, Dada, Lubna, additional, Qi, Ximeng, additional, Hakala, Simo, additional, Sundström, Anu-Maija, additional, Guo, Yishuo, additional, Lipponen, Antti, additional, Kokkonen, Tom V., additional, Kontkanen, Jenni, additional, Cai, Runlong, additional, Cai, Jing, additional, Chan, Tommy, additional, Chen, Liangduo, additional, Chu, Biwu, additional, Deng, Chenjuan, additional, Du, Wei, additional, Fan, Xiaolong, additional, He, Xu-Cheng, additional, Kangasluoma, Juha, additional, Kujansuu, Joni, additional, Kurppa, Mona, additional, Li, Chang, additional, Li, Yiran, additional, Lin, Zhuohui, additional, Liu, Yiliang, additional, Liu, Yuliang, additional, Lu, Yiqun, additional, Nie, Wei, additional, Pulliainen, Jouni, additional, Qiao, Xiaohui, additional, Wang, Yonghong, additional, Wen, Yifan, additional, Wu, Ye, additional, Yang, Gan, additional, Yao, Lei, additional, Yin, Rujing, additional, Zhang, Gen, additional, Zhang, Shaojun, additional, Zheng, Feixue, additional, Zhou, Ying, additional, Arola, Antti, additional, Tamminen, Johanna, additional, Paasonen, Pauli, additional, Sun, Yele, additional, Wang, Lin, additional, Donahue, Neil M., additional, Liu, Yongchun, additional, Bianchi, Federico, additional, Daellenbach, Kaspar R., additional, Worsnop, Douglas R., additional, Kerminen, Veli-Matti, additional, Petäjä, Tuukka, additional, Ding, Aijun, additional, Jiang, Jingkun, additional, and Kulmala, Markku, additional

Published
2022
Full Text
View/download PDF

25. Seasonal variation in oxygenated organic molecules in urban Beijing and their contribution to secondary organic aerosol

Author

Guo, Yishuo, primary, Yan, Chao, additional, Liu, Yuliang, additional, Qiao, Xiaohui, additional, Zheng, Feixue, additional, Zhang, Ying, additional, Zhou, Ying, additional, Li, Chang, additional, Fan, Xiaolong, additional, Lin, Zhuohui, additional, Feng, Zemin, additional, Zhang, Yusheng, additional, Zheng, Penggang, additional, Tian, Linhui, additional, Nie, Wei, additional, Wang, Zhe, additional, Huang, Dandan, additional, Daellenbach, Kaspar R., additional, Yao, Lei, additional, Dada, Lubna, additional, Bianchi, Federico, additional, Jiang, Jingkun, additional, Liu, Yongchun, additional, Kerminen, Veli-Matti, additional, and Kulmala, Markku, additional

Published
2022
Full Text
View/download PDF

28. Insufficient Condensable Organic Vapors Lead to Slow Growth of New Particles in an Urban Environment

Author

Li, Xiaoxiao, primary, Li, Yuyang, additional, Cai, Runlong, additional, Yan, Chao, additional, Qiao, Xiaohui, additional, Guo, Yishuo, additional, Deng, Chenjuan, additional, Yin, Rujing, additional, Chen, Yijing, additional, Li, Yiran, additional, Yao, Lei, additional, Sarnela, Nina, additional, Zhang, Yusheng, additional, Petäjä, Tuukka, additional, Bianchi, Federico, additional, Liu, Yongchun, additional, Kulmala, Markku, additional, Hao, Jiming, additional, Smith, James N., additional, and Jiang, Jingkun, additional

Published
2022
Full Text
View/download PDF

29. Precursor apportionment of atmospheric oxygenated organic molecules using a machine learning method

Author

Qiao, Xiaohui, Li, Xiaoxiao, Yan, Chao, Sarnela, Nina, Yin, Rujing, Guo, Yishuo, Yao, Lei, Nie, Wei, Huang, Dandan, Wang, Zhe, Bianchi, Federico, Liu, Yongchun, Donahue, Neil M., Kulmala, Markku, Jiang, Jingkun, Qiao, Xiaohui, Li, Xiaoxiao, Yan, Chao, Sarnela, Nina, Yin, Rujing, Guo, Yishuo, Yao, Lei, Nie, Wei, Huang, Dandan, Wang, Zhe, Bianchi, Federico, Liu, Yongchun, Donahue, Neil M., Kulmala, Markku, and Jiang, Jingkun

Abstract

Gas-phase oxygenated organic molecules (OOMs) can contribute significantly to both atmospheric new particle growth and secondary organic aerosol formation. Precursor apportionment of atmospheric OOMs connects them with volatile organic compounds (VOCs). Since atmospheric OOMs are often highly functionalized products of multistep reactions, it is challenging to reveal the complete mapping relationships between OOMs and their precursors. In this study, we demonstrate that the machine learning method is useful in attributing atmospheric OOMs to their precursors using several chemical indicators, such as O/C ratio and H/C ratio. The model is trained and tested using data acquired in controlled laboratory experiments, covering the oxidation products of four main types of VOCs (isoprene, monoterpenes, aliphatics, and aromatics). Then, the model is used for analyzing atmospheric OOMs measured in both urban Beijing and a boreal forest environment in southern Finland. The results suggest that atmospheric OOMs in these two environments can be reasonably assigned to their precursors. Beijing is an anthropogenic VOC dominated environment with ~64% aromatic and aliphatic OOMs, and the other boreal forested area has ~76% monoterpene OOMs. This pilot study shows that machine learning can be a promising tool in atmospheric chemistry for connecting the dots. © 2023 The Author(s). Published by the Royal Society of Chemistry.

Published
2022

30. Seasonal variation in oxygenated organic molecules in urban Beijing and their contribution to secondary organic aerosol

Author

Guo, Yishuo, Yan, Chao, Liu, Yuliang, Qiao, Xiaohui, Zheng, Feixue, Zhang, Ying, Zhou, Ying, Li, Chang, Fan, Xiaolong, Lin, Zhuohui, Feng, Zemin, Zhang, Yusheng, Zheng, Penggang, Tian, Linhui, Nie, Wei, Wang, Zhe, Huang, Dandan, Daellenbach, Kaspar R., Yao, Lei, Dada, Lubna, Bianchi, Federico, Jiang, Jingkun, Liu, Yong Chun, Kerminen, Veli-Matti, Kulmala, Markku, Guo, Yishuo, Yan, Chao, Liu, Yuliang, Qiao, Xiaohui, Zheng, Feixue, Zhang, Ying, Zhou, Ying, Li, Chang, Fan, Xiaolong, Lin, Zhuohui, Feng, Zemin, Zhang, Yusheng, Zheng, Penggang, Tian, Linhui, Nie, Wei, Wang, Zhe, Huang, Dandan, Daellenbach, Kaspar R., Yao, Lei, Dada, Lubna, Bianchi, Federico, Jiang, Jingkun, Liu, Yong Chun, Kerminen, Veli-Matti, and Kulmala, Markku

Abstract

Oxygenated organic molecules (OOMs) are crucial for atmospheric new particle formation and secondary organic aerosol (SOA) growth. Therefore, understanding their chemical composition, temporal behavior, and sources is of great importance. Previous studies on OOMs mainly focus on environments where biogenic sources are predominant, yet studies on sites with dominant anthropogenic emissions, such as megacities, have been lacking. Here, we conducted long-term measurements of OOMs, covering four seasons of the year 2019, in urban Beijing. The OOM concentration was found to be the highest in summer (1.6×108 cm-3), followed by autumn (7.9×107 cm-3), spring (5.7×107 cm-3) and winter (2.3×107 cm-3), suggesting that enhanced photo-oxidation together with the rise in temperature promote the formation of OOMs. Most OOMs contained 5 to 10 carbon atoms and 3 to 7 effective oxygen atoms (nOeff=nO-2×nN). The average nOeff increased with increasing atmospheric photo-oxidation capacity, which was the highest in summer and the lowest in winter and autumn. By performing a newly developed workflow, OOMs were classified into the following four types: aromatic OOMs, aliphatic OOMs, isoprene OOMs, and monoterpene OOMs. Among them, aromatic OOMs (29%-41%) and aliphatic OOMs (26%-41%) were the main contributors in all seasons, indicating that OOMs in Beijing were dominated by anthropogenic sources. The contribution of isoprene OOMs increased significantly in summer (33%), which is much higher than those in the other three seasons (8%-10%). Concentrations of isoprene (0.2-5.3×107 cm-3) and monoterpene (1.1-8.4×106 cm-3) OOMs in Beijing were lower than those reported at other sites, and they possessed lower oxygen and higher nitrogen contents due to high NOx levels (9.5-38.3 ppbv - parts per billion by volume) in Beijing. With regard to the nitrogen content of the two anthropogenic OOMs, aromatic OOMs were mainly composed of CHO and CHON species, while aliphatic OOMs were dominated by CHON an

Published
2022

31. Iodine oxoacids and their roles in sub-3 nanometer particle growth in polluted urban environments.

Author

Zhang, Ying, Li, Duzitian, He, Xu-Cheng, Nie, Wei, Deng, Chenjuan, Cai, Runlong, Liu, Yuliang, Guo, Yishuo, Liu, Chong, Li, Yiran, Chen, Liangduo, Li, Yuanyuan, Hua, Chenjie, Liu, Tingyu, Wang, Zongcheng, Wang, Lei, Petäjä, Tuukka, Bianchi, Federico, Qi, Ximeng, and Chi, Xuguang

Subjects
IODINE, ATMOSPHERIC temperature, ATMOSPHERIC nucleation, INORGANIC acids, CITIES & towns, SULFURIC acid, URBAN growth
Abstract

New particle formation processes contribute significantly to the number concentration of ultrafine particles (UFP), and have great impacts on human health and global climate. Iodine oxoacids (HIO x , including iodic acid, HIO3 and iodous acid, HIO2) have been observed in pristine regions and proved to dominate NPF events at some sites. However, the knowledge of HIO x in polluted urban areas is rather limited. Here, we conducted a long-term comprehensive observation of gaseous iodine oxoacids and sulfuric acid in Beijing from January 2019 to October 2021 and also in Nanjing from March 2019 to February 2020, and investigated the contribution of HIO x to UFP number concentration in urban environments. HIO3 concentration is highest in summer, up to 2.85×106 cm-3 and 2.78×106 cm-3 in Beijing and Nanjing, respectively, and is lowest in winter, with a more prominent seasonal variation than H2SO4. HIO3 concentration shows a clear diurnal pattern at both sites with a daily maximum at around noontime, similar to the atmospheric temperature, radiation and ozone (O3) levels. HIO2 concentration has the same diurnal and seasonal trend as HIO3 but is overall about one order of magnitude lower than HIO3 concentration. Back trajectory analysis suggests that the sources for inland iodine species could be a mix of marine and terrestrial origins, both having peak iodine emission in warm seasons. While the contribution of HIO2 to particle growth is marginal in Beijing and Nanjing, our results demonstrate that HIO3 enhances the particle survival probability of sub-3 nm particles by about 40 % (median) and occasionally by more than 100 % in NPF events, suggesting HIO x are non-negligible contributor to UFPs in polluted urban areas. As the growth contribution from HIO3 and H2SO4 is similar on a per-molecule basis, we propose that the sum of HIO3 and H2SO4 could be used to estimate sub-3 nm particle growth of inorganic acid origin, in the polluted atmospheres with a significant amount of HIO x . [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

32. Influence of Aerosol Chemical Composition on Condensation Sink Efficiency and New Particle Formation in Beijing

Author

Du, Wei, primary, Cai, Jing, additional, Zheng, Feixue, additional, Yan, Chao, additional, Zhou, Ying, additional, Guo, Yishuo, additional, Chu, Biwu, additional, Yao, Lei, additional, Heikkinen, Liine M., additional, Fan, Xiaolong, additional, Wang, Yonghong, additional, Cai, Runlong, additional, Hakala, Simo, additional, Chan, Tommy, additional, Kontkanen, Jenni, additional, Tuovinen, Santeri, additional, Petäjä, Tuukka, additional, Kangasluoma, Juha, additional, Bianchi, Federico, additional, Paasonen, Pauli, additional, Sun, Yele, additional, Kerminen, Veli-Matti, additional, Liu, Yongchun, additional, Daellenbach, Kaspar R., additional, Dada, Lubna, additional, and Kulmala, Markku, additional

Published
2022
Full Text
View/download PDF

33. Supplementary material to "Seasonal Variation of Oxygenated Organic Molecules in Urban Beijing and their Contribution to Secondary Organic Aerosol"

Author

Guo, Yishuo, primary, Yan, Chao, additional, Liu, Yuliang, additional, Qiao, Xiaohui, additional, Zheng, Feixue, additional, Zhang, Ying, additional, Zhou, Ying, additional, Li, Chang, additional, Fan, Xiaolong, additional, Lin, Zhuohui, additional, Feng, Zemin, additional, Zhang, Yusheng, additional, Zheng, Penggang, additional, Tian, Linhui, additional, Nie, Wei, additional, Wang, Zhe, additional, Huang, Dandan, additional, Daellenbach, Kaspar R., additional, Yao, Lei, additional, Dada, Lubna, additional, Bianchi, Federico, additional, Jiang, Jingkun, additional, Liu, Yongchun, additional, Kerminen, Veli-Matti, additional, and Kulmala, Markku, additional

Published
2022
Full Text
View/download PDF

34. Seasonal Variation of Oxygenated Organic Molecules in Urban Beijing and their Contribution to Secondary Organic Aerosol

Author

Guo, Yishuo, primary, Yan, Chao, additional, Liu, Yuliang, additional, Qiao, Xiaohui, additional, Zheng, Feixue, additional, Zhang, Ying, additional, Zhou, Ying, additional, Li, Chang, additional, Fan, Xiaolong, additional, Lin, Zhuohui, additional, Feng, Zemin, additional, Zhang, Yusheng, additional, Zheng, Penggang, additional, Tian, Linhui, additional, Nie, Wei, additional, Wang, Zhe, additional, Huang, Dandan, additional, Daellenbach, Kaspar R., additional, Yao, Lei, additional, Dada, Lubna, additional, Bianchi, Federico, additional, Jiang, Jingkun, additional, Liu, Yongchun, additional, Kerminen, Veli-Matti, additional, and Kulmala, Markku, additional

Published
2022
Full Text
View/download PDF

35. Supplementary material to "The effect of COVID-19 restrictions on atmospheric new particle formation in Beijing"

Author

Yan, Chao, primary, Shen, Yicheng, additional, Stolzenburg, Dominik, additional, Dada, Lubna, additional, Qi, Ximeng, additional, Hakala, Simo, additional, Sundström, Anu-Maija, additional, Guo, Yishuo, additional, Lipponen, Antti, additional, Kokkonen, Tom, additional, Kontkanen, Jenni, additional, Cai, Runlong, additional, Cai, Jing, additional, Chan, Tommy, additional, Chen, Liangduo, additional, Chu, Biwu, additional, Deng, Chenjuan, additional, Du, Wei, additional, Fan, Xiaolong, additional, He, Xu-Cheng, additional, Kangasluoma, Juha, additional, Kujansuu, Joni, additional, Kurppa, Mona, additional, Li, Chang, additional, Li, Yiran, additional, Lin, Zhuohui, additional, Liu, Yiliang, additional, Liu, Yuliang, additional, Lu, Yiqun, additional, Nie, Wei, additional, Pulliainen, Jouni, additional, Qiao, Xiaohui, additional, Wang, Yonghong, additional, Wen, Yifan, additional, Wu, Ye, additional, Yang, Gan, additional, Yao, Lei, additional, Yin, Rujing, additional, Zhang, Gen, additional, Zhang, Shaojun, additional, Zheng, Feixue, additional, Zhou, Ying, additional, Arola, Antti, additional, Tamminen, Johanna, additional, Paasonen, Pauli, additional, Sun, Yele, additional, Wang, Lin, additional, Donahue, Neil M., additional, Liu, Yongchun, additional, Bianchi, Federico, additional, Daellenbach, Kaspar R., additional, Worsnop, Douglas R., additional, Kerminen, Veli-Matti, additional, Petäjä, Tuukka, additional, Ding, Aijun, additional, Jiang, Jingkun, additional, and Kulmala, Markku, additional

Published
2022
Full Text
View/download PDF

36. A New Type of Quartz Smog Chamber: Design and Characterization

Author

Ma, Wei, primary, Liu, Yongchun, additional, Zhang, Yusheng, additional, Feng, Zemin, additional, Zhan, Junlei, additional, Hua, Chenjie, additional, Ma, Li, additional, Guo, Yishuo, additional, Zhang, Ying, additional, Zhou, Wenshuo, additional, Yan, Chao, additional, Chu, Biwu, additional, Chen, Tianzeng, additional, Ma, Qingxin, additional, Liu, Chunshan, additional, Kulmala, Markku, additional, Mu, Yujing, additional, and He, Hong, additional

Published
2022
Full Text
View/download PDF

39. Contribution of Atmospheric Oxygenated Organic Compounds to Particle Growth in an Urban Environment

Author

Qiao, Xiaohui, primary, Yan, Chao, additional, Li, Xiaoxiao, additional, Guo, YiShuo, additional, Yin, Rujing, additional, Deng, Chenjuan, additional, Li, Chang, additional, Nie, Wei, additional, Wang, Mingyi, additional, Cai, Runlong, additional, Huang, Dandan, additional, Wang, Zhe, additional, Yao, Lei, additional, Worsnop, Douglas R., additional, Bianchi, Federico, additional, Liu, Yongchun, additional, Donahue, Neil M., additional, Kulmala, Markku, additional, and Jiang, Jingkun, additional

Published
2021
Full Text
View/download PDF

40. Formation of nighttime sulfuric acid from the ozonolysis of alkenes in Beijing

Author

Guo, Yishuo, Yan, Chao, Li, Chang, Ma, Wei, Feng, Zemin, Zhou, Ying, Lin, Zhuohui, Dada, Lubna, Stolzenburg, Dominik, Yin, Rujing, Kontkanen, Jenni, Daellenbach, Kaspar R., Kangasluoma, Juha, Yao, Lei, Chu, Biwu, Wang, Yonghong, Cai, Runlong, Bianchi, Federico, Liu, Yongchun, Kulmala, Markku, Institute for Atmospheric and Earth System Research (INAR), Air quality research group, INAR Physics, and Polar and arctic atmospheric research (PANDA)

Subjects
114 Physical sciences
Abstract

Gaseous sulfuric acid (SA) has received a lot of attention for its crucial role in atmospheric new particle formation (NPF). And for this reason, studies until now have mainly focused on daytime SA when most NPF events occur. While daytime SA production is driven by SO2 oxidation of OH radicals of photochemical origin, the formation of SA during nighttime and its potential influence on particle formation remains poorly understood. Here we present evidence for significant nighttime SA production in urban Beijing during winter, yielding concentrations between 1.0 and 3.0 × 106 cm−3. We found a high frequency (∼ 30 %) of nighttime SA events, which are defined by the appearance of a distinct SA peak observed between 20:00 and 04:00 local time, with the maximum concentration exceeding 1.0 × 106 cm−3. These events mostly occurred during unpolluted nights with a low vapor condensation sink. Furthermore, we found that under very clean conditions (visibility > 16.0 km) with abundant ozone (concentration > 2.0 × 1011 cm−3, ∼ 7 ppb), the overall sink of SA was strongly correlated with the products of O3, alkenes and SO2 concentrations, suggesting that the ozonolysis of alkenes played a major role in nighttime SA formation under such conditions. This is in light of previous studies showing that the ozonolysis of alkenes can form OH radicals and stabilized Criegee intermediates (SCIs), both of which are able to oxidize SO2 and thus lead to SA formation. However, we also need to point out that there exist additional sources of SA under more polluted conditions, which are not investigated in this study. Moreover, there was a strong correlation between SA concentration and the number concentration of sub-3 nm particles on both clean and polluted nights. Different from forest environments, where oxidized biogenic vapors are the main driver of nighttime clustering, our study demonstrates that the formation of nighttime cluster mode particles in urban environments is mainly driven by nighttime SA production.

Published
2021

42. Rapid mass growth and enhanced light extinction of atmospheric aerosols during the heating season haze episodes in Beijing revealed by aerosol–chemistry–radiation–boundary layer interaction

Author

Lin, Zhuohui, primary, Wang, Yonghong, additional, Zheng, Feixue, additional, Zhou, Ying, additional, Guo, Yishuo, additional, Feng, Zemin, additional, Li, Chang, additional, Zhang, Yusheng, additional, Hakala, Simo, additional, Chan, Tommy, additional, Yan, Chao, additional, Daellenbach, Kaspar R., additional, Chu, Biwu, additional, Dada, Lubna, additional, Kangasluoma, Juha, additional, Yao, Lei, additional, Fan, Xiaolong, additional, Du, Wei, additional, Cai, Jing, additional, Cai, Runlong, additional, Kokkonen, Tom V., additional, Zhou, Putian, additional, Wang, Lili, additional, Petäjä, Tuukka, additional, Bianchi, Federico, additional, Kerminen, Veli-Matti, additional, Liu, Yongchun, additional, and Kulmala, Markku, additional

Published
2021
Full Text
View/download PDF

43. Atmospheric gaseous hydrochloric and hydrobromic acid in urban Beijing, China: detection, source identification and potential atmospheric impacts

Author

Fan, Xiaolong, primary, Cai, Jing, additional, Yan, Chao, additional, Zhao, Jian, additional, Guo, Yishuo, additional, Li, Chang, additional, Dällenbach, Kaspar R., additional, Zheng, Feixue, additional, Lin, Zhuohui, additional, Chu, Biwu, additional, Wang, Yonghong, additional, Dada, Lubna, additional, Zha, Qiaozhi, additional, Du, Wei, additional, Kontkanen, Jenni, additional, Kurtén, Theo, additional, Iyer, Siddhart, additional, Kujansuu, Joni T., additional, Petäjä, Tuukka, additional, Worsnop, Douglas R., additional, Kerminen, Veli-Matti, additional, Liu, Yongchun, additional, Bianchi, Federico, additional, Tham, Yee Jun, additional, Yao, Lei, additional, and Kulmala, Markku, additional

Published
2021
Full Text
View/download PDF

44. Formation of nighttime sulfuric acid from the ozonolysis of alkenes in Beijing

Author

Guo, Yishuo, primary, Yan, Chao, additional, Li, Chang, additional, Ma, Wei, additional, Feng, Zemin, additional, Zhou, Ying, additional, Lin, Zhuohui, additional, Dada, Lubna, additional, Stolzenburg, Dominik, additional, Yin, Rujing, additional, Kontkanen, Jenni, additional, Daellenbach, Kaspar R., additional, Kangasluoma, Juha, additional, Yao, Lei, additional, Chu, Biwu, additional, Wang, Yonghong, additional, Cai, Runlong, additional, Bianchi, Federico, additional, Liu, Yongchun, additional, and Kulmala, Markku, additional

Published
2021
Full Text
View/download PDF

45. Supplementary material to "Atmospheric gaseous hydrochloric and hydrobromic acid in urban Beijing, China: detection, source identification and potential atmospheric impacts"

Author

Fan, Xiaolong, primary, Cai, Jing, additional, Yan, Chao, additional, Zhao, Jian, additional, Guo, Yishuo, additional, Li, Chang, additional, Dällenbach, Kaspar R., additional, Zheng, Feixue, additional, Lin, Zhuohui, additional, Chu, Biwu, additional, Wang, Yonghong, additional, Dada, Lubna, additional, Zha, Qiaozhi, additional, Du, Wei, additional, Kontkanen, Jenni, additional, Kurtén, Theo, additional, Iyer, Siddhart, additional, Kujansuu, Joni T., additional, Petäjä, Tuukka, additional, Worsnop, Douglas R., additional, Kerminen, Veli-Matti, additional, Liu, Yongchun, additional, Bianchi, Federico, additional, Tham, Yee Jun, additional, Yao, Lei, additional, and Kulmala, Markku, additional

Published
2020
Full Text
View/download PDF

46. Atmospheric gaseous hydrochloric and hydrobromic acid in urban Beijing, China: detection, source identification and potential atmospheric impacts

Author

Fan, Xiaolong, primary, Cai, Jing, additional, Yan, Chao, additional, Zhao, Jian, additional, Guo, Yishuo, additional, Li, Chang, additional, Dällenbach, Kaspar R., additional, Zheng, Feixue, additional, Lin, Zhuohui, additional, Chu, Biwu, additional, Wang, Yonghong, additional, Dada, Lubna, additional, Zha, Qiaozhi, additional, Du, Wei, additional, Kontkanen, Jenni, additional, Kurtén, Theo, additional, Iyer, Siddhart, additional, Kujansuu, Joni T., additional, Petäjä, Tuukka, additional, Worsnop, Douglas R., additional, Kerminen, Veli-Matti, additional, Liu, Yongchun, additional, Bianchi, Federico, additional, Tham, Yee Jun, additional, Yao, Lei, additional, and Kulmala, Markku, additional

Published
2020
Full Text
View/download PDF

47. Sources and sinks driving sulfuric acid concentrations in contrasting environments: implications on proxy calculations

Author

Dada, Lubna, primary, Ylivinkka, Ilona, additional, Baalbaki, Rima, additional, Li, Chang, additional, Guo, Yishuo, additional, Yan, Chao, additional, Yao, Lei, additional, Sarnela, Nina, additional, Jokinen, Tuija, additional, Daellenbach, Kaspar R., additional, Yin, Rujing, additional, Deng, Chenjuan, additional, Chu, Biwu, additional, Nieminen, Tuomo, additional, Wang, Yonghong, additional, Lin, Zhuohui, additional, Thakur, Roseline C., additional, Kontkanen, Jenni, additional, Stolzenburg, Dominik, additional, Sipilä, Mikko, additional, Hussein, Tareq, additional, Paasonen, Pauli, additional, Bianchi, Federico, additional, Salma, Imre, additional, Weidinger, Tamás, additional, Pikridas, Michael, additional, Sciare, Jean, additional, Jiang, Jingkun, additional, Liu, Yongchun, additional, Petäjä, Tuukka, additional, Kerminen, Veli-Matti, additional, and Kulmala, Markku, additional

Published
2020
Full Text
View/download PDF

48. Unprecedented Ambient Sulfur Trioxide (SO3) Detection: Possible Formation Mechanism and Atmospheric Implications

Author

Yao, Lei, primary, Fan, Xiaolong, additional, Yan, Chao, additional, Kurtén, Theo, additional, Daellenbach, Kaspar R., additional, Li, Chang, additional, Wang, Yonghong, additional, Guo, Yishuo, additional, Dada, Lubna, additional, Rissanen, Matti P., additional, Cai, Jing, additional, Tham, Yee Jun, additional, Zha, Qiaozhi, additional, Zhang, Shaojun, additional, Du, Wei, additional, Yu, Miao, additional, Zheng, Feixue, additional, Zhou, Ying, additional, Kontkanen, Jenni, additional, Chan, Tommy, additional, Shen, Jiali, additional, Kujansuu, Joni T., additional, Kangasluoma, Juha, additional, Jiang, Jingkun, additional, Wang, Lin, additional, Worsnop, Douglas R., additional, Petäjä, Tuukka, additional, Kerminen, Veli-Matti, additional, Liu, Yongchun, additional, Chu, Biwu, additional, He, Hong, additional, Kulmala, Markku, additional, and Bianchi, Federico, additional

Published
2020
Full Text
View/download PDF

49. Supplementary material to "Rapid mass growth and enhanced light extinction of atmospheric aerosols during the heating season haze episodes in Beijing revealed by aerosol-chemistry-radiation-boundary layer interaction"

Author

Lin, Zhuohui, primary, Wang, Yonghong, additional, Zheng, Feixue, additional, Zhou, Ying, additional, Guo, Yishuo, additional, Feng, Zemin, additional, Li, Chang, additional, Zhang, Yusheng, additional, Hakala, Simo, additional, Chan, Tommy, additional, Yan, Chao, additional, Daellenbach, Kaspar R., additional, Chu, Biwu, additional, Dada, Lubna, additional, Kangasluoma, Juha, additional, Yao, Lei, additional, Fan, Xiaolong, additional, Du, Wei, additional, Cai, Jing, additional, Cai, Runlong, additional, Kokkonen, Tom V., additional, Zhou, Putian, additional, Wang, Lili, additional, Petäjä, Tuukka, additional, Bianchi, Federico, additional, Kerminen, Veli-Matti, additional, Liu, Yongchun, additional, and Kulmala, Markku, additional

Published
2020
Full Text
View/download PDF

50. Rapid mass growth and enhanced light extinction of atmospheric aerosols during the heating season haze episodes in Beijing revealed by aerosol-chemistry-radiation-boundary layer interaction

Author

Lin, Zhuohui, primary, Wang, Yonghong, additional, Zheng, Feixue, additional, Zhou, Ying, additional, Guo, Yishuo, additional, Feng, Zemin, additional, Li, Chang, additional, Zhang, Yusheng, additional, Hakala, Simo, additional, Chan, Tommy, additional, Yan, Chao, additional, Daellenbach, Kaspar R., additional, Chu, Biwu, additional, Dada, Lubna, additional, Kangasluoma, Juha, additional, Yao, Lei, additional, Fan, Xiaolong, additional, Du, Wei, additional, Cai, Jing, additional, Cai, Runlong, additional, Kokkonen, Tom V., additional, Zhou, Putian, additional, Wang, Lili, additional, Petäjä, Tuukka, additional, Bianchi, Federico, additional, Kerminen, Veli-Matti, additional, Liu, Yongchun, additional, and Kulmala, Markku, additional

Published
2020
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results