张树钦,傅刚

• 1:中国海洋大学海洋与大气学院海洋气象系

摘要(Abstract)：

利用FNL(Final Analyses)全球格点资料,对2000—2015年冷季(10月至来年4月)发生于北太平洋(20°N~65°N,110°E~100°W)的爆发性气旋进行了分析研究。依据爆发性气旋的空间分布特征和高时间分辨率的资料,将爆发性气旋定义修订为海表面中心气压(地转调整到45o N)12h平均加深率达到1hPa/h以上的气旋。根据爆发性气旋最大加深率的大小,在强度上将其划分为4类:弱、中、强和超强。日本海、西北太平洋、中西太平洋、中东太平洋和东北太平洋为北太平洋爆发性气旋的5个多发区域,发生于各区域的爆发性气旋依次称之为:JOS(Japan-Okhotsk Sea)、NWP(Northwestern Pacific)、WCP(West-Central Pacific)、ECP(East-Central Pacific)和NEP(Northeastern Pacific)爆发性气旋。北太平洋爆发性气旋发生频数自西向东逐渐减少,呈现出"西多东少"的分布特征。爆发性气旋的统计特征因发生区域不同而呈现出较大差异,NWP爆发性气旋多发生于冬季和早春,而NEP爆发性气旋多发生于秋季和早春;相对于NEP爆发性气旋,NWP爆发性气旋发展较为剧烈,中心最低气压较低,爆发史长和发展史长较长。NWP爆发性气旋的移动路径多为西南-东北向,随着爆发强度的增强,其移动路径更趋于集中。NEP爆发性气旋的移动路径因生成位置的不同而呈现出较大差异,在中西太平洋和中太平洋海域生成的NEP爆发性气旋,其移动路径前期多为偏东向,后期折向西北;而在中东太平洋海域生成的NEP爆发性气旋,其移动路径多为西南-东北向。海洋暖流为NWP和NEP爆发性气旋的急剧发展提供了有利的海洋物理环境场。

关键词(KeyWords)： 北太平洋;爆发性气旋;统计分析;移动路径

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学家基金项目(41275049)资助~~

作者(Author): 张树钦,傅刚

DOI: 10.16441/j.cnki.hdxb.20160426

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• (1)1Bergeron=(24hPa/24h)(sin(60°)/sin(φ),φ为气旋中心的纬度。
• (1)最大加深位置:最大加深率时刻气旋中心所处的位置。
• (1)初始生成位置:在初始生成时刻气旋中心的位置。
• (2)中心气压最低位置:在中心气压最低时刻气旋中心的位置。

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