摘要
分析了西太平洋暖池和南海次表层水温变化对TC的影响,研究结果表明:当赤道西太平洋暖池次表层水温夏半年持续出现正(负)距平时,西北太平洋生成的TC个数比常年偏多(少)是主要现象,这种现象极值年份尤其明显,对南海TC(指南海生成的TC,下同)的个数影响不明显,西北太平洋和南海生成TC的时间比常年提早(推迟)。当南海北部次表层水温夏季和秋季持续出现正(负)距平时,南海TC比常年偏多(少)。TC对南海和东海的影响趋势是一致的,但所受影响的程度东海比南海更为强烈。原因是东海台风波浪比南海高、海面气温比南海低、相对湿度比南海小,故导致SST急速下降。
Using observed data, the authors have analyzed the impact of the variation of subsurface ocean temperature of the equatorial Western Pacific Warm Pool and South China Sea on the tropical cyclones. The results show that the number of tropical cyclones in the Western Pacific are more(or less)than the normai year, and their intensities also stronger(or weaker), when the subsurface ocean temperature of the equatorial Westem Pacific Warm Pool persistently shows positive(or negative)anomaly. This phenomena is especially evident in the extreme years, but effects of the phenomena on tropical cyclones in South China Sea are not obvious. At the same time, the forming of the tropical cyclones in the western and Northern Pacific and in South China Sea is often ahead of time (or postpones). Usually, when the subsurface ocean temperature in the north of South China Sea appears in the positive(or negative)anomaly, the number of tropical cyclones forming in South China Sea are more(or less).
出处
《热带气象学报》
CSCD
北大核心
2003年第3期253-259,共7页
Journal of Tropical Meteorology
基金
国家重点基础研究发展规划项目(G1998040900)第一部分
国家海洋局海洋动力过程与卫星海洋学重点实验室:中国科学院南海海洋研究所LED实验室资助
关键词
西太平洋
暖池
水温
热带气旋
Western Pacific
warmpool
subsurface ocean temperature
tropical cyclones
