气候变化领域集成服务门户(CCPortal): Temporal evolution of aerosols and their extreme events in polluted Asian regions during Terra's 20-year observations

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DOI	10.1016/j.rse.2021.112541
	Temporal evolution of aerosols and their extreme events in polluted Asian regions during Terra's 20-year observations
	Hu, Zhiyuan; Jin, Qinjian; Ma, Yuanyuan; Pu, Bing; Ji, Zhenming; Wang, Yonghong; Dong, Wenjie
通讯作者	Jin, QJ (通讯作者)，Univ Kansas, Dept Geog & Atmospher Sci, Lawrence, KS 66045 USA.
发表日期	2021
ISSN	0034-4257
EISSN	1879-0704
卷号	263
英文摘要	Aerosol pollution is an acute environmental issue in developing countries. Asia has been experiencing rapid changes in anthropogenic aerosols during the past two decades due to fast growth in population and economy. It is still an open question how aerosol loadings, represented by aerosol optical depth (AOD), have evolved in this century, particularly during the past decade when China and India implemented a clean air act aiming to improve air quality. Based on Terra aerosol retrievals and aerosol reanalysis, a change point of AOD trend is detected at 2010 in East China versus a persistent increasing AOD trend in the Indian subcontinent with no detectable change point from 2000 to 2019. In East China, positive AOD trend (+0.11 +/- 0.022 decade- 1) is confirmed from 2000 to 2010 (hereinafter the former period) yet negative trend (-0.26 +/- 0.027 decade- 1) is identified from 2011 to 2019 (hereinafter the later period). In the Indian subcontinent, persistent positive trend (+0.04 +/- 0.001) is detected from 2000 to 2019 (hereinafter the whole period). All of these trends are attributed mainly to changes in sulfate aerosols. Further analysis of the aerosol pollution extreme events (APEE; defined as daily AOD over the long-term local 90th AOD percentile) manifest a positive trend (+0.16 +/- 0.029 decade- 1) of the APEEs' magnitude in East China during the former period yet a negative trend (-0.11 +/- 0.020 decade- 1) during the latter period; the Indian subcontinent demonstrates a positive trend (+0.02 +/- 0.004 decade- 1) during the whole period due to increasing sulfate aerosols. The APEEs have become more frequent (+3.5 +/- 0.53 day month-1 decade- 1) in East China during the former period yet less frequent (-3.6 +/- 0.39 day month-1 decade-1) during the latter period; in the Indian subcontinent, more frequent APEEs (+1.1 +/- 0.25 day month-1 decade- 1) have been detected during the whole period. Consistent with the AOD trends, clear-sky radiation in East China shows a negative trend at the surface (-3.2 +/- 0.67 W m- 2 decade- 1), a positive trend in the atmosphere (+1.4 +/- 0.68 decade- 1), and a negative trend at the top of the atmosphere (-1.8 +/- 0.43 decade- 1) during the former period, respectively; opposite trends with much larger magnitude are seen during the latter period. In the Indian subcontinent, the clear-sky radiation trends during the whole period are -1.4 +/- 0.38, +1.7 +/- 0.31, and + 0.5 +/- 0.16 W m- 2 decade- 1 at the surface, in the atmosphere, and at the top of the atmosphere, respectively. Comparison of radiation trends at clear-sky and all-sky conditions suggests that absorbing aerosols dominate the radiation budget in the atmosphere and the aerosol reanalysis of the Modern-Era Retrospective Analysis for Research ans Applications version 2 (MERRA-2) might overestimate the radiation response to clouds. This study provides an up-to-date analysis of the long-term trends in aerosols and their extreme events and radiation in two of the world's heavily polluted regions and the results have important implications for assessment of the environmental and climatic impacts of the ongoing clean air acts in Asia.
关键词	INDIAN-SUMMER MONSOON UNIFIED SATELLITE CLIMATOLOGY IMAGING SPECTRORADIOMETER MISR ENERGY SYSTEM CERES OPTICAL DEPTH AIR-POLLUTION PARTICULATE MATTER DATA-ASSIMILATION MIDDLE-EAST ANTHROPOGENIC EMISSIONS
英文关键词	Trend; Aerosol; Extreme events; Radiation; Air pollution; Asia; Terra; MERRA-2
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Remote Sensing ; Imaging Science & Photographic Technology
WOS类目	Environmental Sciences ; Remote Sensing ; Imaging Science & Photographic Technology
WOS记录号	WOS:000702863900003
来源期刊	REMOTE SENSING OF ENVIRONMENT
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254858
作者单位	[Hu, Zhiyuan; Ji, Zhenming; Dong, Wenjie] Sun Yat Sen Univ, Sch Atmospher Sci, Key Lab Trop Atmosphere Ocean Syst, Minist Educ, Zhuhai 519082, Peoples R China; [Hu, Zhiyuan; Dong, Wenjie] Southern Marine Sci & Engn Guangdong Lab, Zhuhai 519082, Peoples R China; [Jin, Qinjian; Pu, Bing] Univ Kansas, Dept Geog & Atmospher Sci, Lawrence, KS 66045 USA; [Ma, Yuanyuan] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Land Surface Proc & Climate Change Cold &, Lanzhou 730000, Peoples R China; [Ji, Zhenming] Nanjing Univ Informat Sci & Technol, Minist & Educ, Key Lab Meteorol Disaster KLME, Nanjing, Peoples R China; [Ji, Zhenming] Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Nanjing, Peoples R China; [Wang, Yonghong] Univ Helsinki, Inst Atmospher & Earth Syst Res Phys, Fac Sci, POB 64, Helsinki 00014, Finland
推荐引用方式 GB/T 7714	Hu, Zhiyuan,Jin, Qinjian,Ma, Yuanyuan,et al. Temporal evolution of aerosols and their extreme events in polluted Asian regions during Terra's 20-year observations[J]. 中国科学院西北生态环境资源研究院,2021,263.
APA	Hu, Zhiyuan.,Jin, Qinjian.,Ma, Yuanyuan.,Pu, Bing.,Ji, Zhenming.,...&Dong, Wenjie.(2021).Temporal evolution of aerosols and their extreme events in polluted Asian regions during Terra's 20-year observations.REMOTE SENSING OF ENVIRONMENT,263.
MLA	Hu, Zhiyuan,et al."Temporal evolution of aerosols and their extreme events in polluted Asian regions during Terra's 20-year observations".REMOTE SENSING OF ENVIRONMENT 263(2021).