摘要
本文利用EOF方法,对南海地区（0°～20°N,104°～136°E）感热通量和潜热通量的时空变化进行了分析。结果表明:年变化中前三个特征向量具有明显的物理意义,模态一表征了南海地区感热和潜热通量的气候变化特征;模态二反映了南海地区感热和潜热通量变化与南海ITCZ变化的联系;模态三反映了南海地区感热和潜热通量西北─东南向的半年周期振荡.在热通量的年际变化中,夏季（6～8月）的第一特征向量含有较强的E1 Nino信息,并且和华南后汛期降水有一定的联系。
With the EOF method, the time-space variations of the sensible and latent heat fluxes in the South China Sea(0°-20°N, 104°-l36°E ) are analyzed. The results are as follows: In the annual variations, the first three eigenvectors have evidently physical significance.Mode 1 ( EOF patterns) describes the climatic variation features of sensible and latent heat fluxes. Mode 2 presents the relation between the variation of sensible and latent heat fluxes and the variation of South China Sea's ITCZ. Mode 3 presents northwest-southeast swing of sensible and latent heat fluxes.The oscillation period is half-year. In the interannual variations, in summer(June-Augast) Mode 1 not only has evident information of El-Nino events, but also has some relation to the precipitation during the annually second rainy season in South China.
出处
《海洋预报》
北大核心
1993年第4期47-53,共7页
Marine Forecasts
关键词
热通量
南海地区
海洋
大气
热交换
heat flux, annual and interannual variations, the south China sea.
