夏季黄海冷水团的多年际变化及原因浅析

基于ROMS(the Regional Ocean Model System)模式,以等温线范围变化作为黄海冷水团范围变化的示性指标,采用谱分析及相关分析的方法,分析夏季黄海冷水团范围变化。结果表明:黄海冷水团范围的变化存在明显的年变化特征,与纬向风速和经向风速相关,风速大则范围就大;黄海冷水团的范围还存在着5年的周期变化特征,其与ENSO现象相关;厄尔尼诺年时,滞后17个月的黄海冷水团的分布范围一般会较小;而拉尼娜年时,滞后17个月的黄海冷水团的分布范围会比较大。

The Preliminary Study of Long-term Variability of the Yellow Sea Cold Water in Summer and its Possible Reasons

Based on the ROMS model and taking the Isothermal as the indicator,the variability of the Yellow Sea Cold Water (YSCW) in summer is studied by using the methods of the spectrum and correlation analysis. The results show that:there are obvious interannual variations in the YSCW,which has a good correlation with the zonal and meridional wind velocities six months ahead of it. The range of YSCW is large when the wind velocity is strengthening; there are 5-year variability in the YSCW,which is well respond to the ENSO event. When the El Nino event occurs,the range of the YSCW will be small after seventeen months. When the La-nina event occurs,the range of the YSCW will be large after seventeen months.