大气和海洋科学快报（英文版）2021，Vol.14Issue(3)：36-41,6.
西北太平洋上热带气旋尺度变化率与其尺度和强度的关系
Relationship of tropical cyclone size change rate with size and intensity over the western North Pacific
摘要
Abstract
In this study,the relationship of tropical cyclone (TC) size change rate (SCR),within 24 hours,with size,intensity,and intensity change rate (ICR) are explored over the western North Pacific.TC size is defined as the azimuthally averaged radius of gale-force wind of 17 m s-1 (R17) based on the Multiplatform Tropical Cyclone Surface Winds Analysis data.The majority of SCRs are mainly distributed in the range from-20 to 80 km d-1.The correlation coefficients between SCR and size (SCR-R17),intensity,and ICR (SCR-ICR) are-0.43,-0.12,and 0.25,respectively.The sensitivity of the SCR-R17 and SCR-ICR relationships to size,intensity,and evolution stage are further examined.Results show that the SCR-R17 relationship is more sensitive to variations of size and evolution stage than that of intensity.The relationship of SCR-ICR is largely modulated by the evolution stage.The correlation coefficient of SCR-ICR can increase from 0.25 to 0.40 when only considering the lifetime stages concurrently before and after the lifetime maximum size (LMS) and lifetime maximum intensity.This demonstrates that ICR is a potential factor in predicting SCR during these evolution stages.Besides,the TC size expansion (shrinkage) is more likely to occur for TCs with smaller (larger) size and weaker (stronger) intensity.The complexity of size change during a TC's lifetime can be attributed to the fact that shrinkage or expansion could occur both before and after LMS.关键词
热带气旋/尺度变化率/多平台热带气旋表面风场资料/相关分析Key words
Tropical cyclone/size change rate/Multiplatform Tropical Cyclone Surface Wind Analysis data/correlation analysis引用本文复制引用
Kexin Chen,Guanghua Chen,Chenhong Rao,Ziqing Wang..西北太平洋上热带气旋尺度变化率与其尺度和强度的关系[J].大气和海洋科学快报（英文版）,2021,14(3):36-41,6.基金项目
This study was supported by the National Natural Science Foundation of China[grant numbers 41975071 and 41775063]. （）
