Préparation de l'étalonnage et de la validation des mesures de salinité SMOS : De l'influence de la stratification verticale de la salinité

Abstract : The objective of European satellite SMOS (Soil Moisture and Ocean Salinity),, deployed on 2nd November 2009, is to measure sea surface salinity (SSS) et sol moisture, using L-band radiometry. To reach a 0.1 -0.2 pss precision on averaged SSS maps (over 10 days and 200 km x 200km), measurements have to be calibrated and validated. Comparisons between in situ salinities, measured at several meters depth, and SMOS salinities, representative of the first centimetre below the oceanic surface will be done. However, this vertical difference can imply high salinity differences in case of precipitations. This work focuses on the vertical salinity differences in the first 10 meters depth and their consequences for the calibration and validation of SMOS data. From in situ salinities, salinity differences are studied in tropical oceanic band (30°N -30°S). A statistical analysis about the influence of rain events on theses vertical differences is realised. Because salinities are rare in the first meter depth, we use theoretical model simulating salinities differences in case or precipitation : NEMO, a coupled ocean-atmosphere model and an unidirectional model PWP ([Price et al., 1986]).
Document type :
Theses
Complete list of metadatas

Cited literature [92 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-00471532
Contributor : Claire Henocq <>
Submitted on : Thursday, April 8, 2010 - 2:36:19 PM
Last modification on : Tuesday, June 18, 2019 - 1:19:23 AM
Long-term archiving on : Tuesday, September 14, 2010 - 5:41:16 PM

Identifiers

  • HAL Id : tel-00471532, version 1

Citation

Claire Hénocq. Préparation de l'étalonnage et de la validation des mesures de salinité SMOS : De l'influence de la stratification verticale de la salinité. Océan, Atmosphère. Université Pierre et Marie Curie - Paris VI, 2009. Français. ⟨tel-00471532⟩

Share

Metrics

Record views

715

Files downloads

1001