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Sensitivity of satellite microwave and infrared observations to soil moisture at a global scale
 

Summary: Sensitivity of satellite microwave and infrared
observations to soil moisture at a global scale:
Relationship of satellite observations to in situ soil
moisture measurements
Catherine Prigent,1
Filipe Aires,2,3
William B. Rossow,4
and Alan Robock5
Received 3 June 2004; revised 5 October 2004; accepted 19 January 2005; published 13 April 2005.
[1] This study presents a systematic and integrated analysis of the sensitivity of the
available satellite observations to in situ soil moisture measurements. Although none of
these satellites is optimized for land surface characterization, before the launches of the
SMOS- and HYDROS-dedicated missions they are the only potential sources of global
soil moisture measurements. The satellite observations include passive microwave
emissivities, active microwave scatterometer data, and infrared estimates of the diurnal
amplitude of the surface skin temperature. The Global Soil Moisture Data Bank provides
in situ soil moisture measurements in five separate regions. This simultaneous analysis of
various satellite observations and the large amount of in situ measurements has two
major advantages. First, this analysis helps identify and separate the physical mechanisms
that affect the satellite observations. For example, we show that the passive microwave

  

Source: Aires, Filipe - Laboratoire de Météorologie Dynamique du CNRS, Université Pierre-et-Marie-Curie, Paris 6
Goddard Institute for Space Studies (NASA)
Miller, Kenneth G. - Department of Earth and Planetary Sciences, Rutgers University

 

Collections: Environmental Sciences and Ecology; Geosciences