Correcting Sea Surface Temperature Spurious Effects in Salinity Retrieval

This study focuses on correcting spurious effects in sea surface temperature and salinity retrieval from spaceborne L-band Radiometer measurements. It discusses adjustments of permittivity models and introduces a new parametrization of dielectric constants. Validation using Aquarius data shows promising results.

• Sea Surface Temperature
• Salinity
• Remote Sensing
• Radiometer Measurements
• Data Validation

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Uploaded on Jul 22, 2024 | 1 Views

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1. Correcting sea surface temperature spurious effects in salinity retrieved from spaceborne L- band Radiometer measurements J. Boutin(1), J.L. Vergely(2), E. Dinnat(3), P. Waldteufel(4), Francesco D Amico(5) N. Reul(6) (5), (6), A. Supply(1) (1)and Clovis Thouvenin-Masson(1) (1) (6) (2) (5) (1) (4) (3)

2. Adjustment Adjustment of of permittivity permittivity model model Use SMOS retrieved pseudo-dielectric constant (ACARD) (Waldteufel et al. 2004) Adjust specific permittivity ( parameter) in Somaraju and Trumpf (ST) model at L-Band: ACARD SMOS ACARD KS ST value derived from fits of Ellison, MW 04, Stogryn97 models using in situ (Argo & ships) SST & SSS, after filtering and correction of conditionnal sampling effect, 5<WS<9m/s, =>

3. New BV New BV parametrization parametrization of of dielectric dielectric constant constant Modelled Tb Adjust specific permittivity ( parameter) in ST model at L-Band: New parametrization => close to KS at moderate SST, variation at low and high T parallel to Zhou at 35 and 33pss (absolute calibration is arbitrary) Boutin et al., 2020

4. Validation Validation using using Aquarius data Aquarius data KS MW MW BV-Liebe 92 BV-SMOS-Liebe 93 BV + SMOS-Liebe93+ SST cond. effect New BV dielectric constant => |SSSaq-SSSargo| <0.1 (and <0.05 between 5 and 25 C) similar results when applied in SMOS processing