气候变化领域集成服务门户(CCPortal): The Reduction in Near-Global Cloud Cover After Correcting for Biases Caused by Finite Resolution Measurements

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DOI	10.1029/2020GL090313
	The Reduction in Near-Global Cloud Cover After Correcting for Biases Caused by Finite Resolution Measurements
	Dutta S.; Di Girolamo L.; Dey S.; Zhan Y.; Moroney C.M.; Zhao G.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:23
英文摘要	A solution to the common problem that sensors have in overestimating cloud fraction (CF) due to their finite resolution is implemented by the Multi-angle Imaging SpectroRadiometer (MISR) to produce a resolution-corrected CF product. Here we evaluate the efficacy of this product toward the development of an improved global cloud climatology. We found a large reduction in CF across various regions of the globe due to the correction, with reductions >0.4 in regions dominated by shallow cumulus clouds. The MISR resolution-corrected CF lies within ±0.05–0.08 of 180 randomly selected scenes of 15-m resolution Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) data, where MISR uncorrected CF and Moderate Resolution Imaging Spectroradiometer (MODIS) CF overestimated this benchmark by 0.40–0.50. We conclude that the CF between 50°N and 50°S is much lower than that reported by the original MISR and MODIS and that the new MISR cloud product indeed provides improved estimates of CF. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Climatology; Spectrometers; Advanced spaceborne thermal emission and reflection radiometer; Cloud fraction; Cloud products; Finite resolution; Global clouds; Moderate resolution imaging spectroradiometer; Multiangle imaging spectroradiometer; Shallow cumulus clouds; Radiometers; ASTER; climatology; cloud cover; cumulus; finite element method; MISR; satellite sensor; spatial resolution
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169342
作者单位	Centre for Atmospheric Sciences, Indian Institute of Technology Delhi, New Delhi, India; Department of Atmospheric Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States; Jet Propulsion Laboratory, NASA, Pasadena, CA, United States
推荐引用方式 GB/T 7714	Dutta S.,Di Girolamo L.,Dey S.,et al. The Reduction in Near-Global Cloud Cover After Correcting for Biases Caused by Finite Resolution Measurements[J],2020,47(23).
APA	Dutta S.,Di Girolamo L.,Dey S.,Zhan Y.,Moroney C.M.,&Zhao G..(2020).The Reduction in Near-Global Cloud Cover After Correcting for Biases Caused by Finite Resolution Measurements.Geophysical Research Letters,47(23).
MLA	Dutta S.,et al."The Reduction in Near-Global Cloud Cover After Correcting for Biases Caused by Finite Resolution Measurements".Geophysical Research Letters 47.23(2020).