Estimating Land Surface Albedo from Satellite Data
نویسندگان
چکیده
Title: ESTIMATING LAND SURFACE ALBEDO FROM SATELLITE DATA Tao He, Doctor of Philosophy, 2012 Directed by: Dr. Shunlin Liang, Professor Department of Geographical Sciences Land surface albedo, defined as the ratio of the surface reflected incoming and outgoing solar radiation, is one of the key geophysical variables controlling the surface radiation budget. Surface shortwave albedo is widely used to drive climate and hydrological models. During the last several decades, remotely sensed surface albedo products have been generated through satellite-acquired data. However, some problems exist in those products due to instrument measurement inaccuracies and the failure of current retrieving procedures, which have limited their applications. More significantly, it has been reported that some albedo products from different satellite sensors do not agree with each other and some even show the opposite long term trend regionally and globally. The emergence of some advanced sensors newly launched or planned in the near future will provide better capabilities for estimating land surface albedo with fine resolution spatially and/or
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