Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019GL086288 |
Chemical Differences Between PM1 and PM2.5 in Highly Polluted Environment and Implications in Air Pollution Studies | |
Sun, Yele1,2,3; He, Yao1,2; Kuang, Ye4; Xu, Wanyun5,6; Song, Shaojie7; Ma, Nan4; Tao, Jiangchuan4; Cheng, Peng8; Wu, Cheng8; Su, Hang9; Cheng, Yafang9; Xie, Conghui1,2; Chen, Chun1,2; Lei, Lu1,2; Qiu, Yanmei1,2; Fu, Pingqing10; Croteau, Philip11; Worsnop, Douglas R.11 | |
2020-03-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2020 |
卷号 | 47期号:5 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA; Germany |
英文摘要 | Submicron aerosol (PM1) species measured by aerosol mass spectrometers have been widely used to validate chemical transport models; however, the uncertainties due to chemical differences between PM1 and PM2.5 are poorly constrained. Here we characterized such differences in a highly polluted environment in north China in winter. Our results showed that the changes in PM1/PM2.5 ratios as a function of relative humidity (RH) were largely different for primary and secondary species. Secondary organic and inorganic aerosol (SOA and SIA) presented clear decreases in PM1/PM2.5 ratios at RH > 60% during periods with high SIA contributions (>50%), likely driven by the changes in aerosol hygroscopicity and phase states, while the traffic and coal combustion OA had limited dependence on RH. Thermodynamic modeling showed negligible impacts of PM differences on predictions of particle acidity, yet these impacts can cause a difference in aerosol water content by up to 50-70%. Plain Language Summary Current air pollution studies rely largely upon aerosol mass spectrometers that provide real-time measurements of submicron aerosol (PM1) species, and in many studies, PM1 aerosol species are used to validate those of PM2.5 in chemical transport models and estimate particle acidity and aerosol water content which are key parameters in studying heterogeneous reactions. However, the uncertainties in air pollution studies due to the chemical differences of PM1 and PM2.5 are poorly constrained, particularly in highly polluted environment, for example, China and India. We found that the changes in PM1/PM2.5 ratios as a function of relative humidity were largely different for primary and secondary aerosol species in highly polluted environment, which was likely driven by the changes in aerosol hygroscopicity and phase states. The chemical differences of PM1/PM2.5 ratios were also found to have negligible impacts on predictions of particle acidity, yet these impacts can cause a difference in aerosol water content by up to 50-70%. Considering the rapid increases in the deployments of aerosol mass spectrometers worldwide, the results in this study are of great importance for a better understanding of the uncertainties in both modelling and observations. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000529112700047 |
WOS关键词 | POSITIVE MATRIX FACTORIZATION ; ORGANIC AEROSOL ; SPECIATION MONITOR ; HYGROSCOPIC GROWTH ; PARTICULATE MATTER ; RELATIVE-HUMIDITY ; WINTER HAZE ; CHINA ; MODEL ; PARTICLES |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/279738 |
专题 | 气候变化 |
作者单位 | 1.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing, Peoples R China; 2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China; 3.Chinese Acad Sci, Ctr Excellence Reg Atmospher Environm, Inst Urban Environm, Xiamen, Peoples R China; 4.Jinan Univ, Inst Environm & Climate Res, Guangzhou, Peoples R China; 5.Chinese Acad Meteorol Sci, Inst Atmospher Composit, State Key Lab Severe Weather, Beijing, Peoples R China; 6.Chinese Acad Meteorol Sci, Inst Atmospher Composit, Key Lab Atmospher Chem, Beijing, Peoples R China; 7.Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA; 8.Jinan Univ, Inst Mass Spectrometer & Atmospher Environm, Guangzhou, Peoples R China; 9.Max Planck Inst Chem, Multiphase Chem Dept, Mainz, Germany; 10.Tianjin Univ, Inst Surface Earth Syst Sci, Tianjin, Peoples R China; 11.Aerodyne Res Inc, Billerica, MA 01821 USA |
推荐引用方式 GB/T 7714 | Sun, Yele,He, Yao,Kuang, Ye,et al. Chemical Differences Between PM1 and PM2.5 in Highly Polluted Environment and Implications in Air Pollution Studies[J]. GEOPHYSICAL RESEARCH LETTERS,2020,47(5). |
APA | Sun, Yele.,He, Yao.,Kuang, Ye.,Xu, Wanyun.,Song, Shaojie.,...&Worsnop, Douglas R..(2020).Chemical Differences Between PM1 and PM2.5 in Highly Polluted Environment and Implications in Air Pollution Studies.GEOPHYSICAL RESEARCH LETTERS,47(5). |
MLA | Sun, Yele,et al."Chemical Differences Between PM1 and PM2.5 in Highly Polluted Environment and Implications in Air Pollution Studies".GEOPHYSICAL RESEARCH LETTERS 47.5(2020). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论