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| Titel |
Validation of SMOS and ASCAT data over France with ISBA-A-gs model and the SMOSMANIA network |
| VerfasserIn |
M. Parrens, E. Zakharova, S. Lafont, J.-C. Calvet, Y. Kerr |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250059701
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| Zusammenfassung |
| The SMOS (Soil Moisture and Ocean Salinity) satellite based on an aperture synthesis
L-band radiometry was successfully launched in November 2009. Over land, the aim of
SMOS mission is to provide global surface soil moisture (SSM) maps with an accuracy better
than 0.04 m3.m-3. SSM estimates are also provided by the Advanced Scatterometer, ASCAT
(C-band). Currently, over France, SMOS data at level 1 (brightness temperature) and level 2
(SSM) and the ASCAT soil moisture product are available for the full year 2010. This work
focuses on the validation of SMOS and ASCAT data over France for the year 2010. SMOS
and ASCAT SSM products are compared with the SSM simulated using the ISBA-A-gs
model over France. Also, ASCAT and SMOS SSM products are compared with
in situ measurements from the SMOSMANIA network, comprising 21 stations
located in southern France. All the stations measure soil moisture profiles and the
observation closest to the surface is made at a depth of 5cm. Finally, an attempt
is made to derive SSM from regressed empirical logarithmic equations using a
combination of SMOS brightness temperatures at different angles and polarizations. |
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