HY-2扫描辐射计风速数据产品与平台基观测数据的比较研究  

Comparison of the seawind data obtained by the scanning microwave radiometer aboard on HY-2 satellite with those obtained with the platform

作　　者：张婷[1] 张杰[1] 王进[1,2] 孟俊敏[1] 

机构地区：[1]国家海洋局第一海洋研究所,山东青岛266061 [2]青岛大学,山东青岛266071

出　　处：《海洋科学》2014年第6期43-46,共4页Marine Sciences

基　　金：国家863海洋领域重大项目(2008AA09A403)

摘　　要：基于南海北部PY30-1平台上2012年2月至9月测风仪观测的风速数据,开展了HY-2扫描辐射计风速数据比较研究。选取时空匹配窗口为5 min和25 km,利用HY-2扫描辐射计RM 100,70和35 km分辨率3种风速数据,分别与平台观测数据进行了比较。比较结果表明:在南海北部海域,HY-2扫描辐射计100 km分辨率风速和平台观测风速的均方根偏差为3.86 m/s;70 km分辨率风速和平台观测风速的均方根偏差为10.52 m/s;35 km分辨率风速和平台观测风速的均方根偏差为5.54 m/s。还进一步比较了有雨和无雨两种情况下HY-2扫描辐射计和平台数据的偏差,结果表明:有雨和无雨条件下都是100 km分辨率的数据偏差最小。这为在我国南海北部海域应用HY-2扫描辐射计的风速数据产品的选择提供了依据。We compared the wind data obtained by the Scanning Microwave Radiometer aboard on HY-2 Satellite with those obtained with the platform from February 2012 to Septemper 2012 in the Northern South China Sea. The temporal and spatial differences between the HY-2 and platform-measured data were limited to less than 5 min and 25 km. The spatial resolution of HY-2 data used in our study was 100, 70 and 35 km. The Root Mean Square （RMS） between HY-2 wind speed data with 100 km resolution and the platform-measured wind speed data was about 3.86 m/s. The RMS between HY-2 wind speed data with 70 km resolution and the platform-measured wind speed data was about 10.52 m/s. The RMS between HY-2 wind speed data with 35 km resolution and the platform-measured wind speed data was about 5.54 m/s. We also calculated the RMS between the HY-2 wind speed data and the platform-measured data under the conditions with rain or without rain. In conclusion, the HY-2 wind speed data with 100 km resolution is best under the condition without rain, and the HY-2 wind speed data with 35 km resolution is best under the condition with rain. We have provided a basis for using sea wind data of the Scanning Microwave Radiometer aboard on HY-2 Satellite in the Northern South China Sea.

关 键 词：HY-2扫描辐射计 平台 风速数据 南海 

分 类 号：P352[天文地球—空间物理学]