Global maps of roughness parameters from L-band SMOS observations
Langue
en
Communication dans un congrès
Ce document a été publié dans
IGARSS 2014, International Geoscience and Remote Sensing Symposium, 2014-07-13, Québec. 2014
IEEE
Résumé en anglais
The Soil Moisture and Ocean Salinity (SMOS) mission is the first satellite dedicated to providing global surface soil moisture (SM). SMOS operates at L-band and at this frequency, the signal depends on soil moisture but ...Lire la suite >
The Soil Moisture and Ocean Salinity (SMOS) mission is the first satellite dedicated to providing global surface soil moisture (SM). SMOS operates at L-band and at this frequency, the signal depends on soil moisture but is also significantly affected by surface soil roughness. Using the Combined soil Roughness & Vegetation Effects (CRVE) method detailed in this paper, the effect of vegetation and soil roughness can be combined using a single parameter, referred to as TR here. SM and TR were retrieved by inverting the SMOS observations using the forward emission model (L-MEB). Assuming a linear relationship between TR and LAI obtained by the MODIS data, an Australian map of soil roughness was computed. This map could lead to improved soil moisture retrievals for present and future microwave remote sensing missions such as SMOS and the Soil Moisture Active Passive (SMAP) scheduled for launch in November 2014.< Réduire
Mots clés
SMOS
soil moisture
vegetation
Mots clés en anglais
soil roughness
radiative transfer
retrievals
Origine
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