TOPEX高度计数据反演北太平洋海浪周期  

Retrieving wave period of the North Pacific with TOPEX altimeter

作　　者：李静凯[1] 周良明[1] 李水清[1] 

机构地区：[1]中国海洋大学海洋环境学院,山东青岛266100

出　　处：《海洋通报》2012年第3期268-277,共10页Marine Science Bulletin

摘　　要：利用TOPEX高度计和NDBC浮标同步观测数据,对7种高度计海浪周期反演模型进行了系统的比较分析,从反演模式的精度、反演周期整体分布、周期-波高的联合分布等方面对反演模型做出了评价,并根据墨西哥湾和夏威夷海域反演结果对模型的区域适应性进行了验证,结合Hasselmann风浪充分成长关系分析了不同海浪成分下模型的反演效果。分析发现,Mackay等于2008年提出的算法(简称M08)相对于其他算法精度最高,且在不同海域和不同海浪成分下精度没有明显差异。利用M08算法反演了北太平洋海域的海浪平均周期分布,讨论其空间分布特征和季节变化特征如下:北太平洋海域的平均周期在墨西哥湾、西里伯斯海等沿岸地区较小,在西风带海域为较大,并存在明显的地形、纬度差异和季节性变化特征。This paper uses a collocated data set of the TOPEX altimeter and buoy measurements from NDBC to analyze the accuracy of seven models of wave period retrieval by altimeter up to the present and it compares these models with each other in the period distribution,period-significant wave height distribution and other aspects.And this paper also takes the effect of swell into consideration by comparing the precision between Gulf of Mexico and Hawaii sea area,between the upper part and under part of the wind-wave relation of fully developed sea line proposed by Hasselmann（1998） when using these models to retrieve zero up-cross wave period.In general,the accuracy of M08 algorithm of which RMS is only about 5.7s,higher than those of other algorithms and M08 algorithm also shows no obvious differences on different areas and situations.Then,this paper uses M08 algorithm to retrieve the mean wave period of the North Pacific and discusses its spacial distribution features and seasonal distribution features.Generally,the mean wave period of coastal areas of the North Pacific,such as the Gulf of Mexico and the Celebes Sea,is relatively small while it’s very large in westerly area.And the wave period distribution has obvious topographic,latitude and seasonal variation.

关 键 词：高度计 海浪 波高 周期 反演模型 北太平洋海浪平均周期分布 

分 类 号：P731.22[天文地球—海洋科学]