HY1C/1D海表温度对Terra/Aqua产品的可替代性分析  

Consistent analysis of sea surface temperature products between HY1C/1D and Terra/Aqua

作　　者：毛志华 张贤良[1,2] 刘建强 丁静[4] 陈鹏[1] 朱乾坤 黄海清 马力 Mao Zhihua;Zhang Xianliang;Liu Jianqiang;Ding Jing;Chen Peng;Zhu Qiankun;Huang Haiqing;Ma Li(State Key Laboratory of Satellite Ocean Environment Dynamics,Second Institute of Oceanography,Ministry of Natural Resources,Hangzhou 310012,China;Shanghai Institute of Technical Physics,Chinese Academy of Sciences,Shanghai 200083,China;Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou),Guangzhou 511458,China;National Satellite Ocean Application Service,Beijing 100081,China)

机构地区：[1]自然资源部第二海洋研究所卫星海洋环境动力学国家重点实验室,浙江杭州310012 [2]中国科学院上海技术物理研究所,上海200083 [3]南方海洋科学与工程广东省实验室(广州),广东广州511458 [4]国家卫星海洋应用中心,北京100081

出　　处：《海洋学报》2023年第3期97-112,共16页

基　　金：国家重点研发计划支持项目(2016YFC1400901);南方海洋科学与工程广东省实验室(广州)人才团队引进重大专项(GML2019ZD0602);国家自然科学基金(61991454);高分辨率对地观测系统重大专项(05-Y30B01-9001-19/20-2)。

摘　　要：通过卫星遥感获取的海表温度(SST)产品已经成为海洋和大气研究中的重要数据源,我国海洋水色遥感卫星(HY1C和HY1D)的海洋水色水温扫描仪(COCTS)具有两个热红外通道,可反演全球SST遥感产品。对比Terra和Aqua卫星的中分辨率成像光谱仪(MODIS)的SST产品,分析COCTS海表温度产品对MODIS相应产品的可替代性。比较了两种卫星的全球SST单日和月平均融合产品的图像空间结构,分析了匹配像元SST值的离散度,统计了HY1C/1D的误差结果,讨论了HY1C与HY1D产品的一致性、不同质量控制方案对SST产品影响以及遥感产品质量对昼夜SST变化研究影响等问题。结果表明,以2020年6月SST(Terra)为真值,HY1C白天SST的单日全球遥感产品的平均偏差、绝对偏差、均方根误差和相关系数分别为0.04℃、0.60℃、0.78℃和0.98,夜晚SST的单日全球遥感产品的平均偏差、绝对偏差、均方根误差和相关系数分别为-0.16℃、0.78℃、0.95℃和0.86。以2020年6月SST(Aqua)为真值,HY1D白天SST的单日全球遥感产品的平均偏差、绝对偏差、均方根误差和相关系数分别为0.02℃、0.59℃、0.79℃和0.98,夜晚SST的单日全球遥感产品的平均偏差、绝对偏差、均方根误差和相关系数分别为-0.09℃、0.61℃、0.82℃和0.96。这些统计值可以通过严格的质量控制方案来减小,但海洋锋面等区域的有效数据率会随着质量控制的阈值变小而显著减小。COCTS的全球SST遥感图像与MODIS相应产品在空间分布上差异性很小,长时间序列遥感图像结果比较具有良好的时空稳定性,多种SST产品整体都表现出对MODIS同类产品具有良好的一致性和可替代性。通过对SST昼夜变化等方面研究,提出了遥感SST产品质量提升的发展方向,来提高其在海洋昼夜温度短期变化等相关海洋学研究的应用能力。The sea surface temperature(SST) products,obtained from the Chinese Ocean Color and Temperature Scanner(COCTS) on the two haiyang satellites(HY1C and HY1D),play an important role in oceanic and atmospheric researches.It is important to know whether they are consistent with products from other satellites such as the Moderate Resolution Imaging Spectroradiometer(MODIS) on Terra and Aqua satellites.The data quality of SST global images from COCTS on HY1C/1D is evaluated by the average bias,absolute difference,root mean square error,and correlation coefficient based on in-situ SST measurements and the MODIS products.The results show that the spatial patterns of the daily and monthly global SST of HY1C/1D are similar to those of Terra/Aqua.The average bias,absolute difference,root mean square error and correlation coefficient of the global daily SST/HY1C products at daytime,based on the SST values of Terra on June 2020,are 0.04℃,0.60℃,0.78℃ and0.98,respectively,and that of the nighttime products are-0.16℃,0.78℃,0.95℃ and 0.86,respectively.Similarly,the values of the daytime SST products of HY1D comparing with the SST of Aqua on June 2020 are 0.02℃,0.59℃,0.79℃ and 0.98,and that of the nighttime products are-0.09℃,0.61℃,0.82℃ and 0.96,respectively.The evaluation on other seasons indicates that the SST products from COCTS are very stable.However,the data quality control scheme and inhomogeneity correction still need to be developed to improve the performance of SST products of HY1C/1D.As a whole,the SST products of HY1C/1D can be used in some applications,similar to the Terra/Aqua products.

关 键 词：海表温度 COCTS-HY1C/1D MODIS-Terra/Aqua 可替代性 

分 类 号：P731.11[天文地球—海洋科学]