Sea surface emissivity observations at L-band: first results of the Wind and Salinity Experiment WISE 2000

Sea surface salinity can be measured by passive microwave remote sensing at L-band. In May 1999, the European Space Agency (ESA) selected the Soil Moisture and Ocean Salinity (SMOS) Earth Explorer Opportunity Mission to provide global coverage of soil moisture and ocean salinity. To determine the effect of wind on the sea surface emissivity, ESA sponsored the Wind and Salinity Experiment (WISE 2000). This paper describes the field campaign, the measurements acquired with emphasis in the radiometric measurements at L-band, their comparison with numerical models, and the implications for the remote sensing of sea salinity.

[1]  P. Smith.  The emissivity of sea foam at 19 and 37 GHz , 1988 .

[2]  M. A. Goodberlet,et al.  Microwave Remote Sensing of Coastal Zone Salinity , 1997 .

[3]  Philip D. Watts,et al.  Wind Speed Effects on Sea Surface Emission and Reflection for the Along Track Scanning Radiometer , 1996 .

[4]  Calvin T. Swift,et al.  Considerations for Microwave Remote Sensing of Ocean-Surface Salinity , 1983, IEEE Transactions on Geoscience and Remote Sensing.

[5]  K. Masuda,et al.  Emissivity of pure and sea waters for the model sea surface in the infrared window regions , 1988 .

[6]  Niels Skou,et al.  Wind direction over the ocean determined by an airborne, imaging, polarimetric radiometer system , 2001, IEEE Trans. Geosci. Remote. Sens..

[7]  James P. Hollinger,et al.  Passive Microwave Measurements of Sea Surface Roughness , 1971 .

[8]  C J Donlon,et al.  Effect of atmospheric radiance errors in radiometric sea-surface skin temperature measurements. , 2000, Applied optics.

[9]  William L. Smith,et al.  Observations of the infrared radiative properties of the ocean-implications for the measurement of sea surface temperature via satellite remote sensing , 1996 .

[10]  M. A. Goodberlet,et al.  Airborne Salinity Mapper Makes Debut in Coastal Zone , 1998 .

[11]  Stuart D. Smith.  Coefficients for sea surface wind stress, heat flux, and wind profiles as a function of wind speed and temperature , 1988 .

[12]  Simon Yueh,et al.  Modeling of wind direction signals in polarimetric sea surface brightness temperatures , 1997, IEEE Trans. Geosci. Remote. Sens..

[13]  K. Katsaros,et al.  A Unified Directional Spectrum for Long and Short Wind-Driven Waves , 1997 .

[14]  Simon Yueh,et al.  Modelling of wind direction signals in polarimetric sea surface brightness temperatures , 1996, IGARSS '96. 1996 International Geoscience and Remote Sensing Symposium.

[15]  S. Durden,et al.  A physical radar cross-section model for a wind-driven sea with swell , 1985, IEEE Journal of Oceanic Engineering.

[16]  Edward C. Monahan,et al.  Acoustically relevant bubble assemblages and their dependence on meteorological parameters , 1990 .

[17]  Thomas Wilheit,et al.  A Model for the Microwave Emissivity of the Ocean's Surface as a Function of Wind Speed , 1979, IEEE Transactions on Geoscience Electronics.

[18]  Albin J. Gasiewski,et al.  Polarized microwave emission from water waves , 1994 .

[19]  C. T. Swift,et al.  Microwave radiometer measurements of the Cape Cod Canal , 1974 .

[20]  Simon Yueh,et al.  Polarimetric brightness temperatures of sea surfaces measured with aircraft K- and Ka-band radiometers , 1997, IEEE Trans. Geosci. Remote. Sens..

[21]  Adriano Camps,et al.  Wind direction azimuthal signature in the Stokes emission vector from the ocean surface at microwave frequencies , 2001 .

[22]  Bruce M. Kendall,et al.  Measurement of ocean temperature and salinity via microwave radiometry , 1978 .