Title :
A temperature dependent correction to the model for microwave excess emissivity of the ocean due to surface winds
Author :
Giampaolo, Jude ; Ruf, Christopher S.
Author_Institution :
Dept. of Electr. Eng., Pennsylvania State Univ., University Park, PA, USA
Abstract :
Coincident measurement of ocean surface windspeed, temperature, and microwave emissivity reveal a clear dependence of the slope of the emissivity versus windspeed on the temperature. Water at higher temperatures has a greater increase in emissivity per unit wind speed. This temperature dependence is a residual result of the dependence of the specular ocean surface emissivity on temperature. As the temperature increases, specular microwave emissivity decreases. Since wind roughening and foam increase the emissivity, the increase with respect to the specular baseline is proportionately larger at higher temperatures
Keywords :
atmospheric techniques; ocean waves; oceanographic techniques; radiometry; remote sensing; wind; 18 GHz; SHF; boundary layer; foam; marine atmosphere; measurement technique; microwave emissivity; microwave excess emissivity; microwave radiometry; model; ocean wave; remote sensing; sea surface; specular microwave emissivity; speed; surface layer; surface wind; temperature; temperature dependent correction; wind; wind roughening; windspeed; Assembly; Delay estimation; Geophysical measurements; Ocean temperature; Rough surfaces; Sea measurements; Sea surface; Surface roughness; Temperature dependence; Wind speed;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 1999. IGARSS '99 Proceedings. IEEE 1999 International
Conference_Location :
Hamburg
Print_ISBN :
0-7803-5207-6
DOI :
10.1109/IGARSS.1999.775112
