| SMAP卫星海表盐度产品精度评定与全球海表盐度特征分析 |
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| 引用本文： | 牛原,邱志伟,刘瑞翔,吴振宇,常宇佳,潘春天.SMAP卫星海表盐度产品精度评定与全球海表盐度特征分析[J].海洋学研究,2021,39(3):53-62. |
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| 作者姓名： | 牛原 邱志伟 刘瑞翔 吴振宇 常宇佳 潘春天 |
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| 作者单位： | 1.江苏海洋大学 海洋技术与测绘学院，江苏 连云港222005；
2.江苏省海洋资源开发研究院，江苏 连云港 222005；
3.连云港市气象局，江苏 连云港 222005 |
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| 基金项目： | 江苏省测绘地理信息局开放基金项目(JSCHKY201904)；连云港市“海燕计划”人才资助项目(HYJH202021)；2020年江苏省研究生实践创新计划项目(SJCX20_1254) |
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| 摘 要： | 海表盐度是研究海洋变化及其气候效应重要的物理量。本文将2018年SMAP卫星的月均、日均海表盐度产品分别与Argo月均网格化产品、实时散点盐度数据进行比较，评定其精度，并分析全球海表盐度分布特征。结果表明：SMAP卫星月均产品RMSE为0.17，BIAS为0.11，STD为0.17，R为0.98，t检验呈显著相关；SMAP卫星日均产品RMSE为0.28，BIAS为0.23，STD为0.26，R为0.81，相较月均产品，精度较低。SMAP卫星月均产品偏差在中纬度海域较小，在高纬度海域较大；SMAP卫星日均产品偏差在太平洋海域为-0.6~0.6，在地中海海域超过1.0。全球海表盐度在25.0~40.0之间，沿纬度方向呈带状分布，其中大西洋海表盐度普遍高于太平洋和印度洋。
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| 关 键 词： | 海表盐度 SMAP卫星 精度评定 特征分析 |
Quality assessment and characteristic analysis of global sea surface salinity products based on SMAP |
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| NIU Yuan,QIU Zhiwei,LIU Ruixiang,WU Zhenyu,CHANG Yujia,PAN Chuntian.Quality assessment and characteristic analysis of global sea surface salinity products based on SMAP[J].Journal of Marine Sciences,2021,39(3):53-62. |
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| Authors: | NIU Yuan QIU Zhiwei LIU Ruixiang WU Zhenyu CHANG Yujia PAN Chuntian |
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| Affiliation: | 1.School of Marine Technology and Geomatics, Jiangsu Ocean University, Lianyungang 222005, China;
2.Jiangsu Institute of Marine Resources Development, Lianyungang 222005, China;
3.Lianyungang Meteorological Bureau, Lianyungang 222005, China |
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| Abstract: | Sea surface salinity is an important physical quantity for studying ocean changes and its climate effects. In this study, it was compared the monthly and daily average sea surface salinity products of the SMAP satellite in 2018 with the monthly average grid products and real-time scattered salinity data of Argo respectively, its accuracy was assessed and the global sea surface salinity distribution characteristics were analyzed. The results show that the average monthly product RMSE of SMAP satellite is 0.17, BIAS is 0.11, STD is 0.17, R is 0.98, and the t-test shows a significant correlation; the average daily product RMSE of SMAP satellite is 0.28, BIAS is 0.23, STD is 0.26, and R is 0.81. Compared with the monthly average product, the accuracy of average daily product is lower. The monthly average product deviation of SMAP satellites is small in mid-latitude seas and larger in high-latitude seas; the average daily product deviation of SMAP satellites is -0.6~0.6 in the Pacific Ocean and exceeds 1.0 in the Mediterranean Sea. The global sea surface salinity is between 25.0 and 40.0, among which the Atlantic sea surface salinity is generally higher than those of the Pacific and Indian Oceans, and the global sea surface salinity has an obvious zonal distribution pattern in the latitude direction. |
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| Keywords: | sea surface salinity SMAP satellite accuracy assessment characteristic analysis |
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