【摘要】：Aquarius/SAC-D衛(wèi)星,以實(shí)現(xiàn)海表鹽度(sea surface salinity,SSS)全球遙感觀測為目標(biāo),經(jīng)過算法的不斷改進(jìn),迄今已發(fā)布第4版產(chǎn)品(V4).已有的檢驗(yàn)研究表明V1.3產(chǎn)品在全球最大的邊緣�！袊虾５木炔⑽催_(dá)到該產(chǎn)品的目標(biāo)精度,主要原因是射頻干擾(radio frequency interference,RFI)的影響.為探討新版數(shù)據(jù)在中國南海的精度,通過比較南海走航鹽度、Argo浮標(biāo)鹽度與Aquarius遙感SSS V4及舊版產(chǎn)品的差異,發(fā)現(xiàn)Aquarius遙感SSS V4與走航鹽度及Argo浮標(biāo)鹽度的均方根誤差(RMSE)分別為0.47和0.73,V4產(chǎn)品整體表現(xiàn)優(yōu)于V3及之前的版本,特別是在南海北部近岸高RFI海域,V4產(chǎn)品的偏差也小于V3,說明V4產(chǎn)品中RFI的影響相較于V3產(chǎn)品在一定程度上得到了有效的去除.同時(shí),分析表明Aquarius遙感SSS V4產(chǎn)品所揭示的南海SSS空間分布與季節(jié)變動(dòng)特征,與前人通過實(shí)測調(diào)查獲得的結(jié)論基本一致.
[Abstract]:Aquarius/SAC-D satellite, aiming at realizing the global remote sensing observation of sea surface salinity (SSS), has been published the 4th edition product (V4) by the continuous improvement of the algorithm. The existing test and research show that the accuracy of V1.3 product in the world's largest marginal sea, the South China Sea, has not reached the target precision of this product, the main reason is that In order to explore the accuracy of the new version of data in the South China Sea, the differences between Aquarius SSS V4 and Aquarius remote sensing SSS V4 and the old version of products were compared. It was found that the RMSE of Aquarius remote sensing SSS V4 was 0.47 compared with that of navigation salinity and Argo buoy salinity, respectively. And 0.73, the overall performance of V4 products is better than that of V3 and previous versions, especially in the high-RFI sea area near the northern coast of the South China Sea, and the deviation of V4 products is less than that of V3. This shows that the influence of RFI in V4 products is effectively removed to a certain extent compared with that of V3 products. The characteristics of seasonal variation are basically the same as those obtained by previous surveys.
【作者單位】： 水聲通信與海洋信息技術(shù)教育部重點(diǎn)實(shí)驗(yàn)室(廈門大學(xué));
【基金】：國家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(973計(jì)劃)(2009CB421201) 國家自然科學(xué)基金(J1210050)
【分類號(hào)】：P715.7

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