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利用1949—2011年CMA-STI热带气旋最佳路径数据集,分析了西北太平洋累积气旋能量(ACE)的年代际变化特征。结果表明,西北太平洋热带气旋(ACE)的年代际变化主要分为1957—1967高值期、1976—1986过渡期和1998—2008低值期。其中强热带风暴(STS)、台风(TY)和超强台风(SuperTY),特别超强台风是决定成分。副热带高压偏弱,垂直风切变偏小,低纬度低空正涡度异常偏东以及低纬度海表面温度(SST)正异常偏东等背景场的年代际特征,有利于形成ACE的年代高值期。
Abstract：The best track data of tropical cyclones provided by the Shanghai Typhoon Institute(STI) over the western North Pacific Sea from 1949to 2011are employed to analyze the decadal variations of accumulated cyclone energy(ACE).Decadal variability of ACE about tropical cyclone over the western North Pacific is mainly divided into the high-value period(1957—1967),transition period(1976—1986) and low value period(1998—2008).Severe tropical storm(STS),typhoon(TY)and super typhoon(SuperTY)are very important in dividing the years,and especially the SuperTY is the crucial composition.While the weak subtropical high,small wind shear,eastward relative vorticity anomaly in low levels at low latitudes,and eastward sea surface temperature anomaly at low latitudes,all of these decadal features are favorable for the formation of the high-value period of ACE.
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基本信息:
DOI：10.16441/j.cnki.hdxb.2014.05.003
中图分类号:P732
引用信息:
[1]王功录,王启,赵海.西北太平洋累积气旋能量的年代际变化[J],2014,44(05):17-24.DOI:10.16441/j.cnki.hdxb.2014.05.003.
基金信息:
国家重点基础研究发展计划项目(2012CB417402;2013CB956201)资助