摘要
利用 4 9a( 1 950— 1 998年 ) NCEP/NCAR逐月 SSTA资料和 EOF方法 ,分别对太平洋、大西洋、印度洋和全球海洋 SSTA主要特征向量的空间分布和相应的时间变化进行了讨论。利用 Morlet小波进一步分析了要素场的周期变化和能量变化。发现经 EOF分解后的 SSTA场具有很好的空间整体性和明显的年际和年代际变化。各大洋海温变化存在明显的同期和时滞相关关系 ,很好地体现了大洋间的协同作用和太平洋的主导作用。从不同的空间分布模态中选择海温变化显著的区域作为关键区 ,进行同期和时滞相关分析 ,结果发现各关键区之间具有明显的同期和时滞相关关系。
The monthly sea surface temperature anomalies in the Pacific Ocean,the Atlantic Ocean,the Indian Ocean and global oceans in recent 50 years (from 1950 to 1998) are respectively analyzed by the EOF method,the spatial distribution and corresponding temporal variation of the main EOF modes are also discussed.Then,the period and energy analyses of element fields are further investigated by means of the Morlet wavelet technic.It is found that the first five EOF modes of SSTA fields have a good spatial global property and evident interannual and interdecadal variations.On the other hand,it is indicated that there exist conspicuous simultaneous and time lag correlations of SSTAs between the great oceans,thus reflecting the coordinated effect of the oceans and the dominant effect of the Pacific Ocean respectively.In addition,the areas with distinct sea surface temperature variations from different spatial distribution modes are choosed as key areas,and the simultaneous and time lag correlations are analyzed.Results show that there are remarkable correlations of SSTAs among the key sea areas.
出处
《南京气象学院学报》
CSCD
北大核心
2002年第6期755-763,共9页
Journal of Nanjing Institute of Meteorology
基金
国家自然科学基金项目"南亚高压与亚洲季风相互作用及其机理的研究"(4 0 1 75 0 2 1)
