气候变化领域集成服务门户(CCPortal): Potential impact of aerosols on convective clouds revealed by Himawari-8 observations over different terrain types in eastern China

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DOI	10.5194/acp-21-6199-2021
	Potential impact of aerosols on convective clouds revealed by Himawari-8 observations over different terrain types in eastern China
	Chen T.; Li Z.; A. Kahn R.; Zhao C.; Rosenfeld D.; Guo J.; Han W.; Chen D.
发表日期	2021
ISSN	1680-7316
起始页码	6199
结束页码	6220
卷号	21 期号:8
英文摘要	Convective clouds are common and play a major role in Earth's water cycle and energy balance; they may even develop into storms and cause severe rainfall events. To understand the convective cloud development process, this study investigates the impact of aerosols on convective clouds by considering the influence of both topography and diurnal variation in radiation. By combining texture analysis, clustering, and thresholding methods, we identify all convective clouds in two warm seasons (May-September, 2016/17) in eastern China based on Himawari-8 Level 1 data. Having large diurnally resolved cloud data together with surface meteorological and environmental measurements, we investigate convective cloud properties and their variation, stratified by elevation and diurnal change. We then analyze the potential impact of aerosol on convective clouds under different meteorological conditions and topographies. In general, convective clouds tend to occur preferentially under polluted conditions in the morning, which reverses in the afternoon. Convective cloud fraction first increases then decreases with aerosol loading, which may contribute to this phenomenon. Topography and diurnal meteorological variations may affect the strength of aerosol microphysical and radiative effects. Updraft is always stronger along the windward slopes of mountains and plateaus, especially in northern China. The prevailing southerly wind near the foothills of mountains and plateaus is likely to contribute to this windward strengthening of updraft and to bring more pollutant into the mountains, thereby strengthening the microphysical effect, invigorating convective clouds. By comparison, over plain, aerosols decrease surface heating and suppress convection by blocking solar radiation reaching the surface. © 2021 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	aerosol; convective cloud; diurnal variation; pollution effect; radiative forcing; satellite data; solar radiation; terrain; topography; updraft; China
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246950
作者单位	State Key Laboratory of Remote Sensing Sciences, College of Global Change and Earth System Science, Beijing Normal University, Beijing, 100875, China; Department of Atmospheric and Oceanic Sciences, Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD 20740, United States; State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, 100081, China; Earth Sciences Division, NASA Goddard Space Flight Center, Greenbelt, MD 20771, United States; Institute of Earth Sciences, Hebrew University, Jerusalem, Israel; Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
推荐引用方式 GB/T 7714	Chen T.,Li Z.,A. Kahn R.,et al. Potential impact of aerosols on convective clouds revealed by Himawari-8 observations over different terrain types in eastern China[J],2021,21(8).
APA	Chen T..,Li Z..,A. Kahn R..,Zhao C..,Rosenfeld D..,...&Chen D..(2021).Potential impact of aerosols on convective clouds revealed by Himawari-8 observations over different terrain types in eastern China.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(8).
MLA	Chen T.,et al."Potential impact of aerosols on convective clouds revealed by Himawari-8 observations over different terrain types in eastern China".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.8(2021).