冬季黑潮延伸体区域海表温度异常对北太平洋气旋活动的影响Impacts of SSTA in the Kuroshio Extension Region on Cyclone Activity in the North Pacific in Winter
慈航,罗德海
摘要(Abstract):
计算了黑潮延伸体区域冬季海表温度异常的平均值,并选取了正、负异常年份,对正、负异常年份的气旋活动进行了合成分析。结果表明:正异常年份相对于负异常年份气旋的分布在中、西太平洋明显偏北,而且正异常年份气旋生成区域相对集中,主要集中在日本以东的洋面上,成熟和消亡区域则集中在中太平洋区域,西太平洋的鄂霍次克海区域也有相当数量;负异常年份的气旋生成区域则覆盖了包括日本在内的西太平洋的广大区域,在中太平洋的中纬度区域也有相当数量,成熟期虽然也有部分集中在西太平洋区域,但是消亡期则几乎没有在西太平洋出现,而是主要出现在中太平洋偏东的区域。随后的1 000 hPa位势高度场合成分析和斜压性的分析则进一步证明了这些结论。
关键词(KeyWords): 黑潮延伸体;海表温度异常;中纬度气旋;气旋示踪;气旋分布
基金项目(Foundation): 国家杰出青年基金(40325016);; 国家重点基础研究发展计划项目(2005CB422300)资助
作者(Author): 慈航,罗德海
DOI: 10.16441/j.cnki.hdxb.2007.s2.008
参考文献(References):
- ECMWF再分析资料取自http://data.ecmwf.int/data/d/era40-daily/;
- SODA资料取自http://dsrs.atmos.umd.edu/
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