Soil moisture mapping over the Chinese Loess Plateau using ENVISAT/ASAR data

Details Soil moisture mapping over the Chinese Loess Plateau using ENVISAT/ASAR data Soil moisture mapping over the Chinese Loess Plateau using ENVISAT/ASAR data

Apr 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009adspr..43.1111z&link_type=abstract

Advances in Space Research, Volume 43, Issue 7, p. 1111-1117.

Physics

2

Scientific paper

In this paper, we used the available algorithm for soil moisture estimation over LOPEX05 (the Loess Plateau land surface process Experiment (2005)) area. The available algorithm used ENVISAT/ASAR AP mode VV polarization observational data at a low incidence angle and ground measured soil moistures. The ground measurements were performed in the summer of the 2005 during the LOPEX05 field campaign. The validated results indicate that an average difference between the soil moistures estimated from the microwave remote sensing and ground measurements is less than 0.02 cm3/cm3, with a RMS error of 2.0%, and a maximum less than 0.04 cm3/cm3. The algorithm was applied to the surface soil moisture mapping later. The results show that this algorithm is suitable for monitoring soil moisture information of the agricultural fields over the Chinese Loess Plateau, when ground land cover situation and the resolution of imagery data are taken into account. However, we also find that there are large differences over the steep slope region, the edge of mesa. The results are not acceptable for surface soil moisture estimation in these regions. Thus, the surface soil moisture retrieval in the steep slope region of the Loess Plateau need to be further investigated in the future.

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