TERRAPUB Journal of Oceanography

Journal of Oceanography, Vol. 63 (No. 5), pp. 863-872, 2007

Short Contribution

Effect of Air-Sea Temperature Difference on Ocean Microwave Brightness Temperature Estimated from AMSR, SeaWinds, and Buoys

Akira Shibata*

Earth Observation Research Center, Japan Aerospace Exploration Agency, Sengen, Tsukuba 305-8505, Japan

(Received 10 July 2006; in revised form 13 February 2007; accepted 14 April 2007)

Abstract: The effect of air-sea temperature differences on the ocean microwave brightness temperature (Tb) was investigated using the Advanced Microwave Scanning Radiometer (AMSR) aboard the Advanced Earth Observing Satellite-II (ADEOS-II) during a period of seven months. AMSR Tb in the global ocean was combined with wind data supplied by the scatterometer SeaWinds aboard ADEOS-II and air temperature given by a weather forecast model. Tb was negatively correlated with air-sea temperature difference, its ratio lying around -0.4K/°C at the SeaWinds wind speed of 14 m/s for the 6 GHz vertical polarization. Tb of AMSR-E aboard AQUA during 3.5 years was combined with ocean buoy data, and similar results were obtained.

*E-mail: shibata.akira@jaxa.jp

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