DOI: 10.1002/2015JD024402
论文题名: Toward "all weather," long record, and real-time land surface temperature retrievals from microwave satellite observations
作者: Prigent C. ; Jimenez C. ; Aires F.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2016
语种: 英语
英文关键词: Land surface temperature
; Microwave
; Satellite
英文摘要: The land surface temperature can be estimated from satellite passive microwave observations, with limited contamination from the clouds as compared to the infrared satellite retrievals. With ∼60% cloud cover in average over the globe, there is a need for "all weather," long record, and real-time estimates of land surface temperature (Ts) from microwaves. A simple yet accurate methodology is developed to derive the land surface temperature from microwave conical scanner observations, with the help of precalculated land surface microwave emissivities. Different tests are conducted to optimize the algorithms. The method is applied to the Special Sensor Microwave/Imagers (SSM/I) observations over 2 years, regardless of the cloud cover. The results are compared to infrared estimates from International Satellite Cloud Climatology Project (ISCCP) and from Advanced Along Track Scanning Radiometer (AATSR), under clear-sky conditions. Limited biases are observed (∼0.5 K for both comparisons) with a root-mean-square error (RMSE) of ∼5 K, to be compared to the RMSE of ∼3.5 K between ISCCP et AATSR. Cloud contamination in the AATSR estimates have been evidenced, and a simple filtering has been proposed. The microwave surface temperatures have also been carefully compared to in situ Ts time series from a collection of more than 20 stations over a large range of environments. Very good agreement is obtained for well-controlled stations in vegetated environments (down to RMSE of ∼2.5 K for several stations), but the methodology encounter difficulties under cold conditions due to the large variability of snow and ice surface emissivities. © 2016. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62935
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: CNRS, Laboratoire d'Etudes du Rayonnement et de la Matière en Astrophysique Observatoire de Paris, Paris, and Estellus Paris France; Estellus, Paris, and Laboratoire d'Etudes du Rayonnement et de la Matière en Astrophysique CNRS, Observatoire de Paris Paris France
Recommended Citation:
Prigent C.,Jimenez C.,Aires F.. Toward "all weather," long record, and real-time land surface temperature retrievals from microwave satellite observations[J]. Journal of Geophysical Research: Atmospheres,2016-01-01