Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017JD027028 |
Observation-Based Study on Aerosol Optical Depth and Particle Size in Partly Cloudy Regions | |
Varnai, T.1,2; Marshak, A.2; Eck, T. F.3,4 | |
2017-09-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:18 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | This study seeks to help better understand aerosol-cloud interactions by examining statistical relationships between aerosol properties and nearby low-altitude cloudiness using satellite data. The analysis of a global data set of Moderate Resolution Imaging Spectroradiometer observations reveals that the positive correlation between cloudiness and aerosol optical depth (AOD) reported in earlier studies is strong throughout the globe and during both winter and summer. Typically, AOD is 30-50% higher on cloudier-than-average days than on less cloudy days. A combination of satellite observations and Modern-Era Retrospective analysis for Research and Applications, Version 2 global reanalysis data reveals that the correlation between cloud cover and AOD is strong for all aerosol types considered: sulfate, dust, carbon, and sea salt. The observations also indicate that in the presence of nearby clouds, aerosol size distributions tend to shift toward smaller particles over large regions of the Earth. This is consistent with a greater cloud-related increase in the AOD of fine-mode than of coarse-mode particles. The greater increase in fine-mode AOD implies that the cloudiness-AOD correlation does not come predominantly from cloud detection uncertainties. Additionally, the results show that aerosol particle size increases near clouds even in regions where it decreases with increasing cloudiness. This suggests that the decrease with cloudiness comes mainly from changes in large-scale environment, rather than from clouds increasing the number or the size of fine-mode aerosols. Finally, combining different aerosol retrieval algorithms demonstrated that quality assessment flags based on local variability can help identifying when the observed aerosol populations are affected by surrounding clouds. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000416388000027 |
WOS关键词 | MODIS ; OCEAN ; SATELLITE ; PRODUCTS ; THICKNESS ; FRACTION ; MODEL ; VICINITY ; COVER ; SPACE |
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/33728 |
专题 | 气候变化 |
作者单位 | 1.Univ Maryland, Joint Ctr Earth Syst Technol, Baltimore, MD 21201 USA; 2.NASA, Goddard Space Flight Ctr, Climate & Radiat Lab, Greenbelt, MD 20771 USA; 3.Univ Space Res Assoc, Greenbelt, MD USA; 4.NASA, Goddard Space Flight Ctr, Biospher Sci Lab, Greenbelt, MD 20771 USA |
推荐引用方式 GB/T 7714 | Varnai, T.,Marshak, A.,Eck, T. F.. Observation-Based Study on Aerosol Optical Depth and Particle Size in Partly Cloudy Regions[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(18). |
APA | Varnai, T.,Marshak, A.,&Eck, T. F..(2017).Observation-Based Study on Aerosol Optical Depth and Particle Size in Partly Cloudy Regions.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(18). |
MLA | Varnai, T.,et al."Observation-Based Study on Aerosol Optical Depth and Particle Size in Partly Cloudy Regions".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.18(2017). |
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