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本文采用1884—1984年西北太平洋台风资料[1],1949—1980年西北太平洋台风年鉴[2],探讨了西北太平洋台风发生频数的时空分布主要特征,揭示了E1 Nino年西北太平洋台风发生位置的异常情况。得出:1.台风源地中心在140—145°E,8—12°N;2.从台风发生频数的3年滑动平均曲线来看,波谷之间相隔为6—7年,波峰之间多数相隔为5年或8年;3.台风高频区(不论经度带或纬度带)有明显的季节变化;4.台风发生时海温在27℃以上、30℃以下;5.在E1 Nino年,台风高频区比常年台风高频区偏东。并对高频区异常的原因作了初步分析。
This paper uses the Northwest Pacific typhoon data from 1884 to 1984 [1] and the Northwest Pacific Typhoon Almanac from 1949 to 1980 [2] to discuss the main features of temporal and spatial distribution of the frequency of typhoons in the Northwest Pacific, revealing the location of the North Pacific Ocean typhoon in E1 Nino abnormal situation. The results show that: 1. The center of the typhoon source is at 140-145 ° E, 8-12 ° N; 2. From the 3-year moving average curve of typhoon frequency, the troughs are separated by 6-7 years. Most of them are separated by 5 years or 8 years; 3. There is a clear seasonal change in the high-frequency area of the typhoon (regardless of longitude or latitude); 4. When the typhoon occurs, the sea temperature is above 27 ° C and below 30 ° C; In 2009, the typhoon high-frequency area was eastward from the high-frequency area of the normal typhoon. And made a preliminary analysis of the cause of abnormal high frequency area.