中国近海SMAP SSS观测的验证与应用

Coastal Environment, Disaster, and Infrastructure - A Case Study of China's Coastline Pub Date : 2018-11-05 DOI:10.5772/INTECHOPEN.80318

Qiong Wu, Xiaochun Wang, Xianqiang He, Wenhao Liang

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引用次数: 2

摘要

利用2015年9月- 2016年8月土壤水分主-被动(SMAP)任务的海表盐度(SSS)数据，对中国沿海海表盐度的空间分布和季节变化进行了研究。首先，利用中国东海海域原位盐度观测资料对SMAP观测结果进行验证。利用SMAP数据和河流流量数据分析了长江淡水的SSS特征。东海、渤海、黄海长江口周边海域的SSS明显低于公海。中国沿海海域SSS具有明显的季节变化特征，其中长江口毗邻水域的季节变化最为明显，珠江口次之。SSS的最小值出现在夏季，最大值出现在冬季。夏季和冬季SMAP观测与原位观测的日SSS均方根差均在3 psu左右，远低于SSS的年变化幅度。在夏季，SMAP和原位观测的淡水路径是一致的。

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Validation and Application of SMAP SSS Observation in Chinese Coastal Seas

Using sea surface salinity (SSS) from the Soil Moisture Active Passive (SMAP) mission from September 2015 to August 2016, the spatial distribution and seasonal variation in SSS in the Chinese coastal seas were investigated. First, in situ salinity observation over Chinese East Sea was used to validate SMAP observation. Then, the SSS signature of the Yangtze River fresh water was analyzed using SMAP data and the river discharge data. The SSS around the Yangtze River estuary in the Chinese East Sea, the Bohai Sea and the Yellow Sea is significantly lower than that of the open ocean. The SSS of Chinese coastal seas shows significant seasonal variation, and the seasonal variation in the adja cent waters of the Yangtze River estuary is the most obvious, followed by that of the Pearl River estuary. The minimum value of SSS appears in summer while maximum in winter. The root-mean-squared difference of daily SSS between SMAP observation and in situ observation is around 3 psu in both summer and winter, which is much lower than the annual range of SSS variation. The path of fresh water from SMAP and in situ observation is consistent during summer time.

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Coastal Environment, Disaster, and Infrastructure - A Case Study of China's Coastline

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