基于观测资料的海浪与混合层深度相关性分析  

Correlation Analysis of the Waves and the Mixing Layer Depth Based on the Observation

作　　者：石永芳[1] 尹训强[1,2] 杨永增[1,2] 

机构地区：[1]国家海洋局第一海洋研究所,山东青岛266061 [2]海洋环境科学与数值模拟国家海洋局重点实验室,山东青岛266061

出　　处：《海洋科学进展》2016年第1期22-36,共15页Advances in Marine Science

基　　金：国家重点基础研究发展计划项目--亚洲区域海陆气相互作用机理及其在全球变化中的作用(2010CB950404)和中尺度涡旋在海洋混合中的作用研究(41106032);国家高技术研究发展计划项目--南海及周边海域风浪流耦合同化精细化数值预报与信息服务系统(2013AA09A506);海洋可再生能源专项资金项目--波浪能重点开发利用区资源勘查和选划(OE-W01区块)(GHME2011ZC07)

摘　　要：从观测数据角度出发,考察海浪与上层海洋混合层深度的变化关系。采用卫星高度计和三套温度观测数据,利用改进的混合层深度提取方法,获得海洋混合层深度。简要分析了多年月平均的有效波高和混合层深度的空间分布特征及时间变化规律,并进一步分析了它们的相关性。二者直接相关性分析的结果表明,在南北半球的中纬度地区二者的相关系数较大,而赤道地区较小。滤除年周期的气候态月平均场后,计算的距平相关系数在赤道区域较小;但在太平洋东部、南部和南印度洋存在一个大值区。此外,进一步研究了有效波高和混合层深度年际距平的相关系数,其空间分布特征与二者的距平相关系数的分布特征类似。为探究混合层深度的影响因素,同时也分析了风场与混合层深度的相关系数。综合上述结果,海浪和上层海洋的混合层深度之间存在着一定的相关性,海浪过程是风输入能量向次表层海洋传播的一个重要途径。This study （MLD）. Satellite alt focused on the relationship between waves and the upper ocean mixing layer depth imeter observation data of significant wave height （SWH） and three sets of tempera- ture observation data are used. An improved method is employed to obtain the ocean MLD. Both the spa- tial distribution and temporal variation of the monthly averaged SWH and MLD are analyzed and their cor- relationship is studied. Results indicated that correlation coefficient over both hemisphere mid-latitude re- gions is large, but small in equatorial regions. We filter monthly averaged climate state field that changes in annual periodicity, and get the anomaly correlation coefficient. While it is smaller in the equatorial re- gion, in both eastern and southern Pacific Ocean and southern Indian Ocean, the anomaly correlation is significant. Furthermore, the annual anomaly correlation coefficient of SWH and MLD is also calculated. Its spatial characteristic is similar to the previous results. For studying the influence factors of mixing layer depth, the correlation coefficient of wind field and MLD are calculated. In conclusion, the study indicates that there is a certain correlation between ocean waves and upper ocean MLD. The former plays an impor- tant role in reducing the latter, which mechanisms are to be further studied.

关 键 词：有效波高 混合层深度 相关性分析 

分 类 号：P73[天文地球—海洋科学]