中国海洋大学学报（自然科学版）2018，Vol.48Issue(5)：125-132,8.DOI:10.16441/j.cnki.hdxb.20150357
基于Aquarius数据的粗糙海面L波段辐射模型研究
Study on L-Band Rough Sea Surface Geophysical Model Function Based on Aquarius
摘要
Abstract
Aquarius is a satellite which mission focuses on the measurement of sea surface salinity from space and was launched in June 2011 by NASA.The main payload of Aquarius is an L-band microwave radiometer.The swath width of three Aquarius beams is 390 km,which ensures the satellite can map the global oceans in a week.Meanwhile,the sea surface wind field and waves induce the extra roughness tO oceans and affect the radiation characteristicsof rough sea surface.It is widely accepted that the brightness temperature from rough sea surface is a significant error sources for salinity remote sensing and a geophysical model function is essential to correct the roughness effect in the brightness temperature measured by space-borne radiometer.In this research,ageophysical model function for L-band rough sea surface radiation is developed based on the match-up data from Aquarius and WindSat.The GMF is involved in a sea surface salinity retrieval procedure and the results are validated with in-situ measurements from Argo buoy.It is indicated that the GMFaccurately depicts the emission properties of rough sea surface under low-moderate wind speed conditions and the standard deviation differences between Aquarius and Argo salinities are less than 0.5.The performance of the GMF degrades under high wind speed (＞12 m/s),the standard deviation is more than 1.关键词
海表盐度/粗糙海面/亮温/AquariusKey words
sea surface salinity/rough sea surface/brightness temperature/Aquarius分类
海洋科学引用本文复制引用
王进,张杰,王晶..基于Aquarius数据的粗糙海面L波段辐射模型研究[J].中国海洋大学学报（自然科学版）,2018,48(5):125-132,8.基金项目
国家重点研发计划项目(2016YFC1401006)资助 Supported by the National Key Research and Development Program of China(2016YFC1401006) （2016YFC1401006）
