【摘要】 利用MITgcm数值模式1980—2001年的常规模拟输出数据,研究了吕宋海峡22年平均的体积、热量和盐量输送随深度的变化,并利用小波变换分别分析了吕宋海峡3个层次(0—145、145—915、915—1 837m)体积和热量输送的年际变化,主要结果如下。(1)在吕宋海峡1 837m层以下,仍有一定数量的西北太平洋海水(体积和盐)西向输送到南海;(2)915—1 615m层的年际体积输送的变化趋势与上两个层次(0—145m、145—915m)类似,但是在某些ENSO时期(如1985、1987、1991—1995年),其年际变化与145—915m层年际变化的位相相反;(3)吕宋海峡年际体积(热量)输送的小波谱图较明显地反映出ENSO现象对吕宋海峡不同层次的输送均产生一定影响。145—915m层次的吕宋海峡年际体积输送与ENSO现象相关性显著。更多还原

【Abstract】 Based on the output data from 1980 to 2001 obtained by the MITgcm’s simulation method,22-year averaged Luzon Strait transport variations with depth are studied.Using wavelet transform,the Luzon Strait transports at three layers (0—145m,145—915m and 915—1 837m,respectively) are calculated,and the interannual variations of the Luzon Strait transports are analyzed.The results are as below.(1) There still exists westward Luzon Strait transports below the depth of 1 837m.(2) The interannual variations of the Luzon Strait transports at the deeper layer are similar to those at the upper and middle layers;however,in some ENSO periods(e.g.1985,1987 and 1991—1995),the interannual variations of the Luzon Strait transports at the deeper layer are out of phase with those at the middle layer(145—915m).(3) As showed in the wavelet power spectrum figures,ENSO influences the Luzon Strait transports at different layers.The interannual variations of the Luzon Strait transports at 0—145m and 145—915m layers are closely related to ENSO,especially the volume transport at 145—915m layer.更多还原