| 基于卫星和Argo观测的阿拉伯海中北部海表盐度季节和年际变化 |
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| 引用本文： | W. N. D. S JAYARATHNA,杜岩,张玉红,孙启伟.基于卫星和Argo观测的阿拉伯海中北部海表盐度季节和年际变化[J].南京气象学院学报,2018,10(3):311-323. |
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| 作者姓名： | W. N. D. S JAYARATHNA 杜岩 张玉红 孙启伟 |
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| 作者单位： | 中国科学院南海海洋研究所 热带海洋环境国家重点实验室, 广州, 510301;中国科学院大学, 北京, 100049,中国科学院南海海洋研究所 热带海洋环境国家重点实验室, 广州, 510301;中国科学院大学, 北京, 100049,中国科学院南海海洋研究所 热带海洋环境国家重点实验室, 广州, 510301,中国科学院南海海洋研究所 热带海洋环境国家重点实验室, 广州, 510301;中国科学院大学, 北京, 100049 |
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| 基金项目： | 国家自然科学基金（41525019，41506019）；国家海洋局项目（GASI-IPOVAI-02） |
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| 摘 要： | 基于美国国家航天局（NASA）发射的水瓶座（Aquarius/SAC-D）卫星和欧洲航天局（ERA）发射的土壤湿度与海洋盐度（SMOS）卫星的观测资料，以及Argo海表盐度资料，重点分析了阿拉伯海中北部海表盐度的季节和年际变化.年平均情况下，Argo、Aquarius和SMOS表现出相似的海表盐度分布形态，均表现了阿拉伯海中北部高达36.5 psu的高盐特征.阿拉伯海中北部海表盐度在2—3月出现最低值，在4月之后快速升高，并在夏季西南季风的成熟阶段达到最高.阿拉伯海中北部海表盐度显著的季节变化与季风风场引起的大量蒸发和平流输送相关.夏季风期间，Ras al Hadd急流将来自阿曼湾的高盐水向东向南输送到阿拉伯海中北部海域，使海表盐度升高并达到最高值；冬季风期间，冬季风环流系统在印度半岛西侧海域形成向北的低盐水输送，造成阿拉伯海中北部海表盐度降低.该低盐水平流在冬季风后期能够影响到阿曼海.阿拉伯海中北部海表盐度年际变化主要与季风驱动的季风环流系统的变化相关，尤其是冬季风期间向北流动的印度西侧沿岸流的强弱与该区域海表盐度年际变化关系密切.
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| 关 键 词： | 阿拉伯海 海表盐度 季风 平流 蒸发 季节和年际变化 |
| 收稿时间： | 2018/4/19 0:00:00 |
Seasonal and interannual variability of sea surface salinity in the central north Arabian Sea based on satellite and Argo observations |
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| W. N. D. S JAYARATHNA,DU Yan,ZHANG Yuhong and SUN Qiwei.Seasonal and interannual variability of sea surface salinity in the central north Arabian Sea based on satellite and Argo observations[J].Journal of Nanjing Institute of Meteorology,2018,10(3):311-323. |
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| Authors: | W N D S JAYARATHNA DU Yan ZHANG Yuhong and SUN Qiwei |
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| Institution: | State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301;University of Chinese Academy of Sciences, Beijing 100049,State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301;University of Chinese Academy of Sciences, Beijing 100049,State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301 and State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301;University of Chinese Academy of Sciences, Beijing 100049 |
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| Abstract: | This study mainly focuses on the seasonal and interannual variability of sea surface salinity (SSS) in the Central North Arabian Sea (CNAS) by using Aquarius/Satelite de Aplicaciones Cientificas-D (SAC-D) and the Soil Moisture and Ocean Salinity (SMOS) satellite measurements,and gridded Argo field data from 2011 to 2015.The mean state of spatial SSS variation is consistent among Argo,Aquarius,and SMOS datasets.CNAS has relatively higher SSS with mean of 36.5 practical salinity unit (psu).The lowest SSS in the studied area occurs during February to March and rapidly increases after April.SSS reaches its maximum during the mature phase of southwest summer monsoon period.The CNAS SSS shows significant seasonality due to the advection and evaporation associated with high monsoon winds.As a result of southward advection,high salinity water from the Gulf of Oman and the existence of Ras al Hadd Jet,contribute to the highest SSS during the southwest monsoon period in the CNAS.Northwestward advection of low salinity water from the south,leads to the salinity reduction during northeast monsoon periods in the region.This low SSS advection can reach the Oman Sea during the late winter monsoon period.The inter-annual variability of the CNAS SSS is mainly associated with the monsoonal ocean circulation that triggered by the regional monsoon variation.In particular,it depends on the strength of the northeastern Arabian coastal currents,which transport low salinity water northwestward. |
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| Keywords: | Arabian Sea sea surface salinity monsoon advection evaporation seasonal and interannual variation |
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