Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019JD030535 |
Formation and Evolution Mechanisms for Two Extreme Haze Episodes in the Yangtze River Delta Region of China During Winter 2016 | |
Li, Mengmeng1; Wang, Tijian1; Xie, Min1; Li, Shu1; Zhuang, Bingliang1; Huang, Xin1; Chen, Pulong1; Zhao, Ming1; Liu, Jane1,2 | |
2019-03-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2019 |
卷号 | 124期号:6页码:3607-3623 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; Canada |
英文摘要 | Severe haze pollution frequently occurred in China during winter. Mechanisms for the formation and evolution of high PM2.5 (particulate matter with aerodynamic diameter of 2.5m or less) episodes, however, remain poorly understood. We characterize two extreme haze episodes in the Yangtze River Delta region of China from 1 to 9 December (Episode I) and 19 to 24 December (Episode II) in 2016 using comprehensive measurements and model analyses. The aqueous sulfur dioxide (SO2) oxidation catalyzed by mineral ions and the heterogeneous uptakes of SO2, sulfuric acid (H2SO4), nitrogen dioxide (NO2), nitrogen trioxide (NO3), nitrogen pentoxide (N2O5), and nitric acid (HNO3) on mineral aerosols are included in the model to better represent the formation of sulfate-nitrate-ammonium. The optimized mechanisms substantially improve the simulations of PM2.5 composition, particularly for sulfate and nitrate. The two episodes show different synoptic conditions and evolution stages, with gradual PM2.5 increase under stagnant weather conditions in Episode I (Stage I: Slow Increase Stage, Stage II: Rapid Formation Stage, and Stage III: Dissipation Stage) and with explosive PM2.5 increase mostly associated with cross-border transport from North China in Episode II (Stage I: Clean Stage, Stage II: Fast Transport Stage, and Stage III: Clear Stage). The concentrations of sulfate-nitrate-ammonium increased evidently and became the key components of PM2.5 during haze episodes. The heterogeneous conversion from SO2 to sulfate on mineral aerosols is the main reason for sulfate increase, accounting for more than 50% of sulfate production. This study provides a better understanding of the causes for winter haze in China. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000464653500045 |
WOS关键词 | GASEOUS NITRIC-ACID ; SULFATE FORMATION ; AIR-POLLUTION ; MINERAL DUST ; KNUDSEN CELL ; HETEROGENEOUS REACTIVITY ; CATALYZED OXIDATION ; CACO3 PARTICLES ; NORTHERN CHINA ; AEROSOL |
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/181745 |
专题 | 气候变化 |
作者单位 | 1.Nanjing Univ, Jiangsu Collaborat Innovat Ctr Climate Change, CMA NJU Joint Lab Climate Predict Studies, Sch Atmospher Sci, Nanjing, Jiangsu, Peoples R China; 2.Univ Toronto, Dept Geog & Planning, Toronto, ON, Canada |
推荐引用方式 GB/T 7714 | Li, Mengmeng,Wang, Tijian,Xie, Min,et al. Formation and Evolution Mechanisms for Two Extreme Haze Episodes in the Yangtze River Delta Region of China During Winter 2016[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019,124(6):3607-3623. |
APA | Li, Mengmeng.,Wang, Tijian.,Xie, Min.,Li, Shu.,Zhuang, Bingliang.,...&Liu, Jane.(2019).Formation and Evolution Mechanisms for Two Extreme Haze Episodes in the Yangtze River Delta Region of China During Winter 2016.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(6),3607-3623. |
MLA | Li, Mengmeng,et al."Formation and Evolution Mechanisms for Two Extreme Haze Episodes in the Yangtze River Delta Region of China During Winter 2016".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.6(2019):3607-3623. |
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