Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018JD029367 |
Quantifying the Impacts of Cold Airmass on Aerosol Concentrations Over North China Using Isentropic Analysis | |
Liu, Qian1,2,3; Chen, Guixing1,2,3; Iwasaki, Toshiki4 | |
2019-07-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2019 |
卷号 | 124期号:13页码:7308-7326 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; Japan |
英文摘要 | Winter air quality can vary markedly due to cold air activities. However, the impacts of the polar cold airmass on aerosol variations has not been clarified in a quantitative manner. Using an isentropic analysis method, we investigated changes in the cold airmass and sulfate aerosol distributions over North China during the winter of 2014/2015. The cold airmass and sulfate concentrations exhibited pronounced out-of-phase variations, with comparable amplitudes at subseasonal (30-60 days) and synoptic (4-6 days) scales. Subseasonal sulfate variations were closely associated with distribution of the polar cold airmass, as it shifted between zonal and meridional patterns, regulating cold airmass fluxes over North China. Typically, subseasonal surges in the cold airmass consisted of several synoptic disturbances, including one cold air outbreak event and 3-6 renewal/decay oscillations. These synoptic inflows of clean cold airmass repeatedly pushed the warm polluted airmass away from North China. Thus, spatiotemporal variations in sulfate better reflect cold airmass distributions and fluxes than northerly wind regimes. Using diagnostic equations derived herein, we estimated the contribution of various physical processes to aerosol variations during cold air anomalies. We found that the local changes in sulfate concentrations were mainly attributed to advection of warm airmasses, as well as advection and vertical displacement by horizontal convergence of the polar cold airmass. The latter two processes contributed most to sulfate decreases, leading to a relatively strong aerosol reductions during cold air outbreaks, while first two processes led to weaker aerosol reductions during cold air oscillations. |
英文关键词 | cold airmass aerosol air quality winter monsoon cold air outbreak isentropic analysis |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000477580200038 |
WOS关键词 | WINTER MONSOON ; AIR MASS ; HAZE ; POLLUTION ; FOG ; VARIABILITY ; EPISODE ; EVENT ; ASIA |
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/185148 |
专题 | 气候变化 |
作者单位 | 1.Sun Yat Sen Univ, Sch Atmospher Sci, Guangzhou, Guangdong, Peoples R China; 2.Sun Yat Sen Univ, Guangdong Prov Key Lab Climate Change & Nat Disas, Guangzhou, Guangdong, Peoples R China; 3.Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai, Peoples R China; 4.Tohoku Univ, Grad Sch Sci, Dept Phys, Sendai, Miyagi, Japan |
推荐引用方式 GB/T 7714 | Liu, Qian,Chen, Guixing,Iwasaki, Toshiki. Quantifying the Impacts of Cold Airmass on Aerosol Concentrations Over North China Using Isentropic Analysis[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019,124(13):7308-7326. |
APA | Liu, Qian,Chen, Guixing,&Iwasaki, Toshiki.(2019).Quantifying the Impacts of Cold Airmass on Aerosol Concentrations Over North China Using Isentropic Analysis.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(13),7308-7326. |
MLA | Liu, Qian,et al."Quantifying the Impacts of Cold Airmass on Aerosol Concentrations Over North China Using Isentropic Analysis".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.13(2019):7308-7326. |
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