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DOI | 10.1029/2019JD031457 |
Significantly Enhanced Aerosol CCN Activity and Number Concentrations by Nucleation-Initiated Haze Events: A Case Study in Urban Beijing | |
Zhang, Fang1; Ren, Jingye1; Fan, Tianyi1; Chen, Lu1; Xu, Weiqi2,3; Sun, Yele2,3; Zhang, Renyi4; Liu, Jieyao1; Jiang, Sihui1; Jin, Xiaoai1; Wu, Hao1; Li, Shangze1; Cribb, Maureen C.5,6; Li, Zhanqing1,5,6 | |
2019-12-21 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2019 |
卷号 | 124期号:24页码:14102-14113 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | The evolution of haze, involving multiple processes such as nucleation, coagulation, and condensation, may exert complex effects on aerosols' cloud condensation nuclei (CCN) activity and number concentration (N-CCN). Based on field campaigns carried out in the winters of 2014 and 2016 in Beijing, we show that N-CCN was significantly enhanced by the evolution of haze, substantially driven by the nucleation process (or new particle formation). The enhancement factor of N-CCN by such nucleation-initiated haze episodes, E_N-CCN, defined as the ratio of N-CCN after haze events to N-CCN prior to haze events, ranged from 2.2 to 6.5 at a supersaturation (S) = 0.76% and from 4.2 to 17.3 at S = 0.23%, the magnitude of which partially depends on the severity of the haze event. The enhancements are much greater than those previously observed and those from model simulations of contribution from new particle formation. This suggests that CCN sources from new particle formation may be underestimated, needing reevaluation in polluted environments where the subsequent growth of newly formed particles can last 2-3 days, yielding more CCN-sized particles. We further quantified that the changes in particle size and composition during the nucleation-initiated evolution of haze are responsible for > 80% and 12-20%, respectively, of the enhancement in CCN activity. The changes in particle composition had a limited impact because most of the ambient particles were already hydrophilic, with hygroscopic parameters of 0.2-0.65. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000503692200001 |
WOS关键词 | CLOUD CONDENSATION NUCLEI ; PARTICLE FORMATION ; ACTIVATION PROPERTIES ; ORGANIC AEROSOLS ; SUBURBAN SITE ; GROWTH ; MODEL ; HYGROSCOPICITY ; SIMULATIONS ; IMPACTS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
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/225966 |
专题 | 环境与发展全球科技态势 |
作者单位 | 1.Beijing Normal Univ, Coll Global Change & Earth Syst Sci, Beijing, Peoples R China; 2.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing, Peoples R China; 3.Univ Chinese Acad Sci, Inst Atmospher Phys, Beijing, Peoples R China; 4.Texas A&M Univ, Dept Atmospher Sci, College Stn, TX USA; 5.Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20742 USA; 6.Univ Maryland, Dept Atmospher & Ocean Sci, College Pk, MD 20742 USA |
推荐引用方式 GB/T 7714 | Zhang, Fang,Ren, Jingye,Fan, Tianyi,et al. Significantly Enhanced Aerosol CCN Activity and Number Concentrations by Nucleation-Initiated Haze Events: A Case Study in Urban Beijing[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019,124(24):14102-14113. |
APA | Zhang, Fang.,Ren, Jingye.,Fan, Tianyi.,Chen, Lu.,Xu, Weiqi.,...&Li, Zhanqing.(2019).Significantly Enhanced Aerosol CCN Activity and Number Concentrations by Nucleation-Initiated Haze Events: A Case Study in Urban Beijing.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(24),14102-14113. |
MLA | Zhang, Fang,et al."Significantly Enhanced Aerosol CCN Activity and Number Concentrations by Nucleation-Initiated Haze Events: A Case Study in Urban Beijing".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.24(2019):14102-14113. |
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