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西北太平洋热带气旋迅速增强特征及其影响因子

梅双丽 江静

梅双丽, 江静. 西北太平洋热带气旋迅速增强特征及其影响因子[J]. 热带气象学报, 2012, (1): 1-11. doi: 10.3969/j.issn.1004-4965.2012.01.001
引用本文: 梅双丽, 江静. 西北太平洋热带气旋迅速增强特征及其影响因子[J]. 热带气象学报, 2012, (1): 1-11. doi: 10.3969/j.issn.1004-4965.2012.01.001
MEI Shuang-Li, JIANG Jing. CHARACTERISTICS AND INFLUENCE FACTORS OF RAPID INTENSIFICATION OF TROPICAL CYCLONES IN THE WESTERN NORTH PACIFIC[J]. Journal of Tropical Meteorology, 2012, (1): 1-11. doi: 10.3969/j.issn.1004-4965.2012.01.001
Citation: MEI Shuang-Li, JIANG Jing. CHARACTERISTICS AND INFLUENCE FACTORS OF RAPID INTENSIFICATION OF TROPICAL CYCLONES IN THE WESTERN NORTH PACIFIC[J]. Journal of Tropical Meteorology, 2012, (1): 1-11. doi: 10.3969/j.issn.1004-4965.2012.01.001

西北太平洋热带气旋迅速增强特征及其影响因子

doi: 10.3969/j.issn.1004-4965.2012.01.001
基金项目: 国家重点基础研究发展项目(2006CB403600);国家自然科学基金(40775043);教育部博士点基金(200802840022)共同资助

CHARACTERISTICS AND INFLUENCE FACTORS OF RAPID INTENSIFICATION OF TROPICAL CYCLONES IN THE WESTERN NORTH PACIFIC

  • 摘要: 选取西北太平洋上热带气旋(TC)24小时风速变化累积频率达95%所对应的15.4 m/s作为迅速增强(RI)的标准,研究了RI个例的基本特征以及TC自身特征因子与环境因子对RI的作用。结果表明,TC迅速增强过程的持续时间平均为33小时,最长可达78小时,并且TC经过迅速增强过程几乎都达到了台风级别以上,其中,一半以上达到了强台风级别以上。对比迅速增强(RI)和非迅速增强(non-RI)个例得到,RI个例相对于non-RI个例发生区域偏南偏东,两者的移动速度没有明显差异,但RI个例有较大向西移动分量并且前12小时增强较大;相对于non-RI个例,RI个例离最大潜在强度较远并且发生在较暖水区和55%~75%的低层相对湿度的条件下;RI个例发生在较小的垂直风切变和较弱的对流层上层东风气流情况下,由上层槽或冷低压引起的强迫弱于平均状况时RI较易发生。TC前12小时强度变化(DVMX)、海表面温度(SST)和垂直风切变(SHR)是影响迅速增强的主要因子,当DVMX≥6.3 m/s时RI发生的可能性最大,达到17.2%。当有若干个影响因子共同起作用时发生RI可能性显著增加,其中以较大的前12小时强度变化(DVMX≥6.3 m/s)、较高的海表面温度(SST≥29.4 ℃)、较弱的垂直风切变(SHR≤5.9 m/s)、较小的相对涡旋角动量通量辐合(REFC≤-1.6 m/(s·d))、偏东经度(LON≥138.2 °E)和低纬度(LAT≤16.7 °N)共同作用时,RI发生的可能性达到最大,可达66.7%。

     

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出版历程
  • 收稿日期:  2011-03-22
  • 修回日期:  2011-01-28

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