Working towards a global-scale vegetation water product from SMOS optical depth
Language
en
Communication dans un congrès
This item was published in
Geoscience and Remote Sensing Symposium (IGARSS), 2014 IEEE International, 2014-07-13, Québec. 2014
IEEE
English Abstract
In this study, vegetation optical depth from ESA's Soil Moisture and Ocean Salinity (SMOS) satellite mission is combined with other existing remote sensing, meteorological and literature data in order to obtain values of ...Read more >
In this study, vegetation optical depth from ESA's Soil Moisture and Ocean Salinity (SMOS) satellite mission is combined with other existing remote sensing, meteorological and literature data in order to obtain values of gravimetric vegetation water content (Mg). The methodology combines an effective medium model valid at passive microwave frequencies with a vegetation dielectric constant model. The algorithm is calibrated for 11 global vegetation classes. The resulting product consists of temporally dynamic ~ 25 km global grids of Mg. The first maps clearly show seasonal differences in vegetation water, which vary for the different continental regions due to variations in e.g. latitude, climate and landcover type. This new vegetation water product is unique and offers important complementary information to existing vegetation indices.Read less <
Keywords
SMOS
English Keywords
vegetation optical depth
vegetation water content
Origin
Hal imported