A new empirical model of sea surface microwave emissivity for salinity remote sensing -: art. no. L01309
A new empirical model of sea surface microwave emissivity for salinity remote sensing -: art. no. L01309
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DOI：
10.1029/2003gl018964
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发表时间：
2004-01-14
影响因子：
5.2
通讯作者：
Julià, A
中科院分区：
文献类型：
--
作者：
Gabarró, C;Font, J;Julià, A
SMOS（土壤湿度和海洋盐度）是欧洲空间局的一项使命，旨在以适合气候研究的空间和时间分辨率绘制精度为0.1 psu的全球海洋盐度图。卫星传感器是一个L波段（1400-1427兆赫）孔径综合干涉辐射计。海水亮温与频率、观测角度、海水介电常数、海面温度和海面状态有关，因此可以反演海面盐度。本文提出了一个新的经验海水发射率模型在L波段，其中表面粗糙度的影响参数化的风速和有效波高。对于SMOS使命，这些参数可以从外部测量和模型诊断中获得。分析了不同来源的辅助信息对SSS反演的影响。
SMOS (Soil Moisture and Ocean Salinity) is a European Space Agency mission that aims at generating global ocean salinity maps with an accuracy of 0.1 psu, at spatial and temporal resolution suitable for climatic studies. The satellite sensor is an L-band (1400-1427 MHz) aperture synthesis interferometric radiometer. Sea surface salinity (SSS) can be retrieved since the brightness temperature of sea water is dependent on the frequency, angle of observation, dielectric constant of sea water, sea surface temperature and sea surface state. This paper presents a new empirical sea water emissivity model at L-band in which surface roughness effects are parameterized in terms of wind speed and significant wave height. For the SMOS mission these parameters can be obtained from external measurements and model diagnostics. An analysis has been done on the effect on SSS retrieval of different sources for this auxiliary information.