南京大学学报（自然科学版）2025，Vol.61Issue(3)：399-408,10.DOI:10.13232/j.cnki.jnju.2025.03.005
西北太平洋热带气旋综合动能的气候态及年代际变化特征
Integrated kinetic energy in Western North Pacific tropical cyclones:Climatology and interdecadal variations
摘要
Abstract
This study analyzes the climatology of Integrated Kinetic Energy(IKE)and its interdecadal variations of tropical cyclones(TCs)over the Western North Pacific(WNP)from July to October during the period of 1981-2017.The results show that the distribution of TC IKE resembles a log-normal distribution,with 75%of TC IKE records lower than 89.38 TJ.In terms of spatial distribution,the area with high IKE is mainly concentrated to the east of China Taiwan and the Philippines,and west of 160°E,while the average IKE in the South China Sea is relatively low.The whole period is divided into two subperiods(P1:1981-1998,P2:1999-2017)to examine the interdecadal variations of IKE.The results show that during the P2 period,TC IKE exhibits a slight upward trend,with a decrease in the proportion of TCs with IKE lower than 50 TJ and an increase in the proportion of TCs with IKE within the range of 50-150 TJ.In terms of spatial distribution,the areas with increased IKE extend from the southeastern part of the WNP in a northwest direction.Meanwhile,the location of maximum IKE has shifted poleward,moving closer to the East Asian coastal regions.These changes of IKE are related to environmental factors.The increase in the low-level relative vorticity,the rise in mid-level humidity,the decrease in vertical wind shear,and the relatively lower static stability provide favorable dynamical and thermodynamic conditions for the development of TCs.The upward trend of IKE for landfalling TCs over China is more pronounced than that over the WNP basin,which is primarily attributed to the combined effect of the changes in TC trajectory and environmental conditions.关键词
西北太平洋/热带气旋/综合动能/年代际变化Key words
Western North Pacific/tropical cyclone/integrated kinetic energy/interdecadal variability分类
天文与地球科学引用本文复制引用
余诗琪,王其伟,仇欣..西北太平洋热带气旋综合动能的气候态及年代际变化特征[J].南京大学学报（自然科学版）,2025,61(3):399-408,10.基金项目
国家自然科学基金联合基金(U2342203),国家自然科学基金(42175062) （U2342203）
