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本文分析了两类(反)EINino年1949~1988年西北太平洋热带风暴活动的气候特点,包括热带风暴生成数和登陆数、风暴生成位置及路径,并讨论了其与太平洋副热带高压的关系。分析结果表明,在EINinoⅠ类年,105°~119.9°E经度范围内的热带风暴生成数偏多,而120°~179.9°E范围内的风暴生成数偏少;风暴生成位置偏西、偏北;移动趋势多转向路径而少西行路径;另外,登陆我国的热带风暴数也偏多,此时,副高脊线偏南,西伸脊点偏东,强度及面积指数均偏弱,Ⅱ类年则相反。同样,分析反EINinoⅠ、Ⅱ类年亦可得到类似的结果。
This paper analyzes the climatic characteristics of tropical cyclones in the northwestern Pacific from 1949 to 1988 in two types of (inverted) EINino, including the number of tropical storms, the number of landfalls, the location and path of storm formation, and their relationship with the Pacific subtropical high. The results show that the number of tropical storms over the range of 105 ° -119.9 ° E in the EINino I year is much larger than that in the range of 120 ° -179.9 ° E, In addition, the number of tropical storms landing in China is also too much, this time, the subtropical ridge line south, west stretch ridge point east, intensity and area index are partial to Weak, the second category is the opposite. Similarly, the analysis of anti-EINino Ⅰ, Ⅱ year can also be a similar result.