| 基于现场观测与MyOcean模式数据的印度洋东南部Aquarius反演海表盐度的评价与纠正 |
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| 引用本文： | 夏深圳,柯长青,周小兵,张杰.基于现场观测与MyOcean模式数据的印度洋东南部Aquarius反演海表盐度的评价与纠正[J].海洋学报(英文版),2016,35(3):54-62. |
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| 作者姓名： | 夏深圳 柯长青 周小兵 张杰 |
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| 作者单位： | 南京大学地理信息技术江苏省重点实验室, 江苏南京 201123;中国南海研究协同创新中心, 江苏南京 201123;软件新技术与产业化协同创新中心, 江苏南京 201123,南京大学地理信息技术江苏省重点实验室, 江苏南京 201123;中国南海研究协同创新中心, 江苏南京 201123;软件新技术与产业化协同创新中心, 江苏南京 201123,蒙大拿大学理工分校地球物理工程学院, 美国蒙大拿州布特 59701,国家海洋局第一海洋研究所, 山东青岛 266061 |
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| 摘 要： | The in situ sea surface salinity(SSS) measurements from a scientific cruise to the western zone of the southeast Indian Ocean covering 30°–60°S, 80°–120°E are used to assess the SSS retrieved from Aquarius(Aquarius SSS).Wind speed and sea surface temperature(SST) affect the SSS estimates based on passive microwave radiation within the mid- to low-latitude southeast Indian Ocean. The relationships among the in situ, Aquarius SSS and wind-SST corrections are used to adjust the Aquarius SSS. The adjusted Aquarius SSS are compared with the SSS data from My Ocean model. Results show that:(1) Before adjustment: compared with My Ocean SSS, the Aquarius SSS in most of the sea areas is higher; but lower in the low-temperature sea areas located at the south of 55°S and west of 98°E. The Aquarius SSS is generally higher by 0.42 on average for the southeast Indian Ocean.(2) After adjustment: the adjustment greatly counteracts the impact of high wind speeds and improves the overall accuracy of the retrieved salinity(the mean absolute error of the Zonal mean is improved by 0.06, and the mean error is-0.05 compared with My Ocean SSS). Near the latitude 42°S, the adjusted SSS is well consistent with the My Ocean and the difference is approximately 0.004.
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| 关 键 词： | 宝瓶座 海表盐度 现场观测数据 比较分析 印度洋东南部西风 |
| 收稿时间： | 2015/1/24 0:00:00 |
| 修稿时间： | 5/5/2015 12:00:00 AM |
Assessment and adjustment of sea surface salinity products from Aquarius in the southeast Indian Ocean based on in situ measurement and MyOcean modeled data |
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| XIA Shenzhen,KE Changqing,ZHOU Xiaobing and ZHANG Jie.Assessment and adjustment of sea surface salinity products from Aquarius in the southeast Indian Ocean based on in situ measurement and MyOcean modeled data[J].Acta Oceanologica Sinica,2016,35(3):54-62. |
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| Authors: | XIA Shenzhen KE Changqing ZHOU Xiaobing and ZHANG Jie |
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| Institution: | Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Nanjing 210023, China;Collaborative Innovation Center of South China Sea Studies, Nanjing 210023, China;Collaborative Innovation Center of Novel Software Technology and Industrialization, Nanjing 210023, China,Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Nanjing 210023, China;Collaborative Innovation Center of South China Sea Studies, Nanjing 210023, China;Collaborative Innovation Center of Novel Software Technology and Industrialization, Nanjing 210023, China,Department of Geophysical Engineering, Montana Tech of the University of Montana, Butte, MT 59701, USA and The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China |
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| Abstract: | The in situ sea surface salinity (SSS) measurements from a scientific cruise to the western zone of the southeast Indian Ocean covering 30°-60°S, 80°-120°E are used to assess the SSS retrieved from Aquarius (Aquarius SSS). Wind speed and sea surface temperature (SST) affect the SSS estimates based on passive microwave radiation within the mid-to low-latitude southeast Indian Ocean. The relationships among the in situ, Aquarius SSS and wind-SST corrections are used to adjust the Aquarius SSS. The adjusted Aquarius SSS are compared with the SSS data from MyOcean model. Results show that:(1) Before adjustment:compared with MyOcean SSS, the Aquarius SSS in most of the sea areas is higher; but lower in the low-temperature sea areas located at the south of 55°S and west of 98°E. The Aquarius SSS is generally higher by 0.42 on average for the southeast Indian Ocean. (2) After adjustment:the adjustment greatly counteracts the impact of high wind speeds and improves the overall accuracy of the retrieved salinity (the mean absolute error of the Zonal mean is improved by 0.06, and the mean error is -0.05 compared with MyOcean SSS). Near the latitude 42°S, the adjusted SSS is well consistent with the MyOcean and the difference is approximately 0.004. |
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| Keywords: | Aquarius sea surface salinity (SSS) in situ SSS MyOcean comparison analysis southeast Indian Ocean |
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