Arid
DOI10.1016/j.rse.2013.05.003
Intercomparison of satellite dust retrieval products over the west African Sahara during the Fennec campaign in June 2011
Banks, J. R.1; Brindley, H. E.1; Flamant, C.2; Garay, M. J.3; Hsu, N. C.4; Kalashnikov, O. V.3; Klueser, L.5; Sayer, A. M.4,6
通讯作者Banks, J. R.
来源期刊REMOTE SENSING OF ENVIRONMENT
ISSN0034-4257
EISSN1879-0704
出版年2013
卷号136页码:99-116
英文摘要

Four aerosol optical depth retrieval algorithms over the Sahara Desert during June 2011 from the IASI, MISR,. MODIS, and SEVIRI satellite instruments are compared against each other in order to understand the strengths and weaknesses of each retrieval approach. Particular attention is paid to the effects of meteorological conditions, land surface properties, and the magnitude of the dust loading. The period of study corresponds to the time of the first Fennec intensive measurement campaign, which provides new ground-based and aircraft measurements of the dust characteristics and loading. Validation using ground-based AERONET sunphotometer data indicates that of the satellite products, the SEVIRI retrieval is most able to retrieve dust during optically thick dust events, whereas IASI and MODIS perform better at low dust loadings. This may significantly affect observations of dust emission and the mean dust climatology. MISR and MODIS are least sensitive to variations in meteorological conditions, while SEVIRI tends to overestimate the aerosol optical depth (AOD) under moist conditions (with a bias against AERONET of 0.31), especially at low dust loadings where the AOD < 1. Further comparisons are made with airborne LIDAR measurements taken during the Fennec campaign, which provide further evidence for the inferences made from the AERONET comparisons. The effect of surface properties on the retrievals is also investigated. Over elevated surfaces IASI retrieves AODs which are most consistent with AERONET observations, while the AODs retrieved by MODIS tend to be biased low. In contrast, over the least emissive surfaces IASI significantly underestimates the AOD (with a bias of -0.41), while MISR and SEVIRI show closest agreement. (C) 2013 The Authors. Published by Elsevier Inc. All rights reserved.


英文关键词Remote sensing of dust Satellite retrieval intercomparisons Aerosol optical depth Fennec
类型Article
语种英语
国家England ; France ; USA ; Germany
收录类别SCI-E
WOS记录号WOS:000322055600010
WOS关键词OPTICAL DEPTH RETRIEVALS ; MINERAL DUST ; AEROSOL PROPERTIES ; MISR AEROSOL ; NORTH-AFRICA ; DESERT ; AERONET ; LAND ; VARIABILITY ; INSTRUMENT
WOS类目Environmental Sciences ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向Environmental Sciences & Ecology ; Remote Sensing ; Imaging Science & Photographic Technology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/179736
作者单位1.Univ London Imperial Coll Sci Technol & Med, Space & Atmospher Phys Grp, London SW7 2BW, England;
2.CNRS, UMR 8190, Lab Atmospheres, Paris, France;
3.CALTECH, Jet Prop Lab, Pasadena, CA USA;
4.NASA Goddard Space Flight Ctr, Greenbelt, MD USA;
5.German Remote Sensing Datactr DFD, German Aerosp Ctr DLR, D-82334 Wessling, Germany;
6.Univ Space Res Assoc, Goddard Earth Sci Technol & Res GESTAR, Columbia, MD USA
推荐引用方式
GB/T 7714
Banks, J. R.,Brindley, H. E.,Flamant, C.,et al. Intercomparison of satellite dust retrieval products over the west African Sahara during the Fennec campaign in June 2011[J],2013,136:99-116.
APA Banks, J. R..,Brindley, H. E..,Flamant, C..,Garay, M. J..,Hsu, N. C..,...&Sayer, A. M..(2013).Intercomparison of satellite dust retrieval products over the west African Sahara during the Fennec campaign in June 2011.REMOTE SENSING OF ENVIRONMENT,136,99-116.
MLA Banks, J. R.,et al."Intercomparison of satellite dust retrieval products over the west African Sahara during the Fennec campaign in June 2011".REMOTE SENSING OF ENVIRONMENT 136(2013):99-116.
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