海浪成长状态对TOPEX/Poseidon高度计风速反演的影响  

Effects of the Wave State on TOPEX/Poseidon Altimeter for Retrieving Winds

作　　者：程永存[1] 刘玉光[2] 徐青[2] 宗海波[2] 文凡[2] 

机构地区：[1]解放军理工大学气象学院,江苏南京211101 [2]中国海洋大学物理海洋实验室,山东青岛266003

出　　处：《海洋通报》2007年第5期11-16,共6页Marine Science Bulletin

基　　金：国家高技术研究发展计划(863计划)所属课题863-2006AA09Z140;中国海洋大学人才引进科研启动基金资助

摘　　要：以墨西哥湾同步高度计、浮标资料为例,研究了海浪成长状态对高度计风速反演的影响。同步的高度计风速和浮标风速比较显示,在墨西哥湾地区,海浪成长状态对高度计风速反演有较大影响。在考虑海浪成长状态影响的条件下,利用谱模型反演高度计风速,取得了较好的效果。与目前TOPEX/Poseidon高度计风速反演业务化算法相比,在海浪未充分成长条件下,考虑海浪成长状态影响后,根据谱模型反演获得的风速与浮标风速之间的均方根误差减小了30%,平均误差减小了83%。在利用谱模型算法反演高度计风速时,谱模型中的波龄因子(表示海浪成长状态)可以根据高度计测得的有效波高和风速获得,因此该方法具有广泛的适用性。The effects of the wave state on the altimeter wind speed retrieval are investigated based on the observations in the Gulf of Mexico. The comparison between measurements from the altimeter and buoys shows that the wave state has significant effects on the altimeter wind speed retrieval. After considering the effects of the wave state, the altimeter winds speed is retrieved more accurately with a new wind wave spectrum model. Compared with the wind speed retrieval algorithm in the operational use for TOPEX/Poseidon altimeter, after the effects of the wind state are included in the analytical algorithm, the root-mean-square difference and the averaged bias between retrieved altimeter wind speeds and buoy observations are 30 % and 83 % less, respectively. The wave age factor which denotes the wave state can be calculated from altimeter measured Hs and Uw （ from algorithm in the operational use for TOPEX/Poseidon altimeter ）. Thus, the analytical algorithm proposed in this study has a comprehensive applicability.

关 键 词：海浪成长状态 TOPEX/POSEIDON 算法 墨西哥湾 

分 类 号：P731.2[天文地球—海洋科学]