Validation of MODIS Sea Surface Temperature Product in the Coastal Waters of the Yellow Sea
Validation of MODIS Sea Surface Temperature Product in the Coastal Waters of the Yellow Sea
复制标题
黄海沿岸海域MODIS海表温度产品验证
DOI：
10.1109/jstars.2017.2651951
复制
发表时间：
2017-05-01
影响因子：
5.5
通讯作者：
Zhang, Zhilei
中科院分区：
文献类型：
--
作者：
Hao, Yanling;Cui, Tingwei;Zhang, Zhilei
海表面温度(SST)在大气和海洋之间的热量、动量和水汽交换中起着重要作用。因此，海温的测量主要从船舶、浮标、近海平台和卫星等方面进行。在过去的几十年里，卫星被越来越多地使用，因为可以获得广泛地区的数据集。利用黄海近海浮标资料，对TERRA和AQUA SST产品上的中分辨率成像光谱仪(MODIS)进行了检验和验证。考虑到沿海地区的复杂性和多变性，采用了严格的匹配方法，导致Terra和Aqua分别进行了154次和164次匹配。MODIS海温与现场浮标海温吻合较好，TERRA和AQUA的平方相关系数R-2分别为0.989和0.987。对于Terra和Aqua，相对于现场SST，卫星获取的SSTs的偏差为0.23摄氏度和0.06摄氏度，标准偏差为0.79摄氏度和0.85摄氏度，均方根误差为0.83摄氏度和0.85摄氏度。MODIS与现场海温的差异表现出明显的季节变化。MODIS海温产品对春季和夏季的精度低于秋季和冬季，这可能是由于山东半岛南部沿海频繁的海雾所致。海温偏差大致依赖于风速，低风速可使海温日变化幅度增大，体表温差增大。然而，偏差与海-气温差或地表流速没有显著的依赖关系。
Sea surface temperature (SST) plays a fundamental role in the exchange of heat, momentum, and water vapor between atmosphere and ocean. Therefore, measurement of SST has been done from ships, buoys, offshore platforms, and satellites. During past decades satellites are being increasingly used, because datasets over wide areas can be obtained. In this paper, moderate resolution imaging spectroradiometer (MODIS) on board Terra and Aqua SST products were examined and validated for coastal waters in the Yellow Sea by using the in situ buoy data. A strict match-up method was adopted in view of the complexity and variability of coastal area, resulting in 154 and 164 match-ups for Terra and Aqua, respectively. The MODIS SST agreed well with in situ buoy SST, with squared correlation coefficients R-2 of 0.989 for Terra, and 0.987 for Aqua. Relative to in situ SSTs, the satellite-derived SSTs had a bias of 0.23 degrees C and 0.06 degrees C, a standard deviation of 0.79 degrees C and 0.85 degrees C, and a root mean square error of 0.83 degrees C and 0.85 degrees C, for Terra and Aqua. The differences between MODIS and in situ SST exhibited apparent seasonal variations. The accuracy of MODIS SST products for spring and summer were lower than those for autumn andwinter, which could be caused by frequent sea fog along the southern coast of Shandong Peninsula. The SST bias approximately depended on wind velocity; low wind velocity could enhance the diurnal SST amplitude and the bulk-skin temperature difference. However, there is no significant dependence of the bias on air-sea temperature difference or surface flow velocity.