摘要
用ＬＥＶＩＴＵＳ和ＮＣＥＰ／ＮＣＡＲ ＯＩＳＳＴ资科，分析了南海暖池的季节和年际变化特征及其与西太平洋暖池和印度洋暖池的关系，讨论了南海暖池强度指数的年际变化与南海季凤爆发时间的联系。结果指出，南海暖池有明显的季节变化特征，１２～２月隆冬季节最弱，～４月迅速发展北上，６～９月达其盛期，整个南海均为高于２８℃的暖水，１０～１１月迅速减弱南退；在南海暖池盛期，其高于２８℃的暖水最大厚度达５５ｍ，暖池轴线呈西南一东北向，主轴位于北加里曼丹－马拉望岛西侧海域陡坡区：南海暖池、西太平洋暖池和印度洋暖池处于同一大尺度海气耦合系统中，有４．８年左右的长周期振荡；南海暖池和印度洋暖池还有２．５年左右周期的振荡和同步的年际变化，南海暖池的强度变化落后于西太平洋暖池５个月左右。结果还指出，南海暖池强度指数的年际变化与南海季风爆发时间有密切关系，前期冬春季南海暖池持续偏暖（冷）时，初夏南海季风爆发一般偏晚（早），这种关系与初夏南海高压的活动有关。
The seasonal and inter-annual variability of the South China Sea warm pool and its relations to the South China Sea monsoon onset were analyzed using Levitus and NCEP/NCAR OISST data. The results show that, there are obvious seasonal variability of the South China Sea warm pool, very weak in winter, rapid development in spring, strong and large in summer and earlier autumn, quick decay from mid-autumn. the thickness of South China Sea warm pool reaches 55 m in its strong period, its main axis is from southwest to northeast and locates alone the steep slope area of west off shore of North Kalimantan Palawan island; the South China Sea, Western Pacific and Indian Ocean warm pools have about 5 years period oscillation which is the same as ENSO cycle, the South China Sea and Indian Ocean warm pools have about 2.5 years period oscillation and similar inter-annual variation, and the South China Sea warm pool has best correlation with 5 months lag to the Western Pacific warm pool. The results also show that there are close relations of the South China Sea warm pool strength index to the South China Sea monsoon onset, when the South China Sea warm pool is continuously stronger (weaker) than normal in previous winter and spring, and the South China Sea monsoon will begin later (earlier) than the normal date, and this relation is connected with the activity of the South China Sea High in early summer.
出处
《热带气象学报》
CSCD
北大核心
2000年第3期202-211,共10页
Journal of Tropical Meteorology
基金
中科院重大项目"南海夏季风活动及其影响的综合研究"
国家攀登项目"南海季风试验"和国家基金
"南海上层海洋热力动力学变异在南
关键词
南海暖池
季节特征
年际变化
南海季风爆发
South China Sea warm pool
seasonal and inter-annual variability
South China Sea monsoon onset
