Evaluations of cirrus contamination and screening in ground aerosol observations using collocated lidar systems

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题名:	Evaluations of cirrus contamination and screening in ground aerosol observations using collocated lidar systems
作者:	劉振榮;Huang, Jingfeng;Hsu, N. Christina;Tsay, Si-Chee;Holben, Brent N.;Welton, Ellsworth J.;Smirnov, Alexander;Jeong, Myeong-Jae;Hansell, Richard A.;Berkoff, Timothy A.;Liu, Zhaoyan;Liu, Gin-Rong;Campbell, James R.;Liew, Soo Chin;Barnes, John E.
贡献者:	太空及遙測研究中心
关键词:	AERONET;aerosol;Aerosols;Atmospheric aerosols;Atmospheric sciences;CALIPSO;Clouds;Contamination;Earth sciences;Earth, ocean, space;Exact sciences and technology;Geophysics;Lidar;MODIS;MPLNET;Radio;Remote sensing;Scientific apparatus & instruments;Seasonal variations;thin cirrus
日期:	2012-01-01
上传时间:	2026-04-21 14:21:41 (UTC+8)
出版者:	Wiley-Blackwell;Washington, DC: Blackwell Publishing Ltd
摘要:	摘要： Cirrus clouds, particularly subvisual high thin cirrus with low optical thickness, are difficult to screen in operational aerosol retrieval algorithms. Collocated aerosol and cirrus observations from ground measurements, such as the Aerosol Robotic Network (AERONET) and the Micro‐Pulse Lidar Network (MPLNET), provide us with an unprecedented opportunity to systematically examine the susceptibility of operational aerosol products to cirrus contamination. Quality assured aerosol optical thickness (AOT) measurements were also tested against the Cloud‐Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) vertical feature mask (VFM) and the Moderate Resolution Imaging Spectroradiometer (MODIS) thin cirrus screening parameters for the purpose of evaluating cirrus contamination. Key results of this study include: (1) quantitative evaluations of data uncertainties in AERONET AOT retrievals are conducted; although AERONET cirrus screening schemes are successful in removing most cirrus contamination, strong residuals displaying strong spatial and seasonal variability still exist, particularly over thin cirrus prevalent regions during cirrus peak seasons; (2) challenges in matching up different data for analysis are highlighted and corresponding solutions proposed; and (3) estimates of the relative contributions from cirrus contamination to aerosol retrievals are discussed. The results are valuable for better understanding and further improving ground aerosol measurements that are critical for aerosol‐related climate research. Key Points Quantitatively evaluate cirrus contamination in AERONET AOT retrieval Highlight and resolve challenges in various types of data matching up Estimate contributions from cirrus contamination to ground aerosol retrieval 其他題名： J. Geophys. Res 出版者： Washington, DC: Blackwell Publishing Ltd 出版日期： 2012-08-16 出處： Journal of Geophysical Research Atmospheres, 2012-08, Vol.117 (D15), p.n/a 資源來源： Wiley Online Library - AutoHoldings Journals 版權： 2012. American Geophysical Union. All Rights Reserved. 版權： 2015 INIST-CNRS 版權： Copyright American Geophysical Union 2012 識別號： ISSN: 0148-0227 識別號： ISSN: 2169-897X 識別號： ISSN: 2156-2202 識別號： EISSN: 2156-2202 識別號： EISSN: 2169-8996 識別號： DOI: 10.1029/2012JD017757
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