基于SAR影像的高分辨率近海风速反演  

The High Spatial Resolution Offshore Wind Speeds Retrieved by SAR

作　　者：郭乔影[1] 黄敬峰[1] 李正泉[2] 张康宇 

机构地区：[1]浙江大学农业遥感与信息技术应用研究所,杭州310058 [2]浙江省气候中心,杭州310007

出　　处：《科技通报》2016年第2期61-65,70,共6页Bulletin of Science and Technology

基　　金：公益性行业(气象)科研专项(GYHY201306050);浙江省科技计划项目(2013C33068)

摘　　要：SAR影像反演高空间分辨率近海风速在海洋资源环境领域具有重要意义。利用CCMP风向数据和SAR影像,研究CCMP风向用于SAR影像高空间分辨率近海风速的反演方法。以2009年8月24日一景ENVISAT ASAR影像为例,将近海风速的反演结果与CCMP及测风塔风速进行比较,结果表明,与CCMP插值风速比较,使用CMOD4、CMOD_IFR2和CMOD5这三种算法的均方根误差分别为0.67 m/s、1.37 m/s和0.83 m/s;而与测风塔风速比较,反演结果的偏差较小,均小于1.5 m/s。因此使用SAR影像和CCMP风向数据能够反演高空间分辨率近海风速,有利于实现近海风场的业务化应用。The high spatial resolution offshore wind speeds retrieved from SAR image is of great important in the field of ocean resources and environment. A study about high spatial resolution offshore wind speeds retrieved from SAR combined with CCMP wind directions was taken into account. One scene ENVISAT ASAR image on August 24, 2009 was used as a case study. The retrieved offshore wind speeds were compared with CCMP wind speeds and anemometer tower wind speeds. The result indicate that the root mean square errors of wind speeds were 0.67 m/s,1.37 m/s and 0.83 m/s respectively used the CMOD4,CMOD_IFR2 and CMOD5 algorithms in compared with CCMP interpolated wind speeds. The bias between the retrieved wind speeds from SAR and anemometer tower wind speeds were less than 1.5m/s .Therefore SAR image has the ability of retrieving high spatial resolution offshore wind speeds combined with CCMP wind directions, it's also benefit for the business application of offshore wind farm.

关 键 词：ASAR CCMP 近海 风速 

分 类 号：P407[天文地球—大气科学及气象学]