SATELLITE-BASED ANALYSIS ON THE CONCENTRIC EYEWALL REPLACEMENT CYCLES OF SUPER TYPHOON MUIFA (1109)  

作　　者：朱雪松 余晖 毛卓成 徐明 谈建国 

机构地区：[1]Shanghai Institute of Meteorological Science, Shanghai 200030 China [2]Shanghai Typhoon Institute/CMA,Shanghai 200030 China [3]Shanghai Urban Environment Meteorology Center, Shanghai 200135 China [4]Institute of Heavy Rain/CMA, Wuhan 430074 China

出　　处：《Journal of Tropical Meteorology》2016年第3期330-340,共11页热带气象学报（英文版）

基　　金：National Natural Science Foundation of China(41405046);National Basic Research Program of China(2015CB452806);China Special Fund for Meteorological Research in the Public Interest(GYHY201406010)

摘　　要：Multisatellite data is used to analyze the characteristics of three eyewall replacement cycles(ERCs) during the lifetime of Typhoon Muifa(1109).Spiral rainbands evolutions,concentric eyewall(CE) structure modes,CE durations,and intensity changes are discussed in detail.In addition,an ERC evolution model of Typhoon Muifa is given.There are four main findings.(1) The outer spiral rainband joins end to end to form the outer eyewall after it disconnects from the original(inner) eyewall.The inner eyewall weakens as the outer eyewall becomes axisymmetric and is intensified.The contraction of the outer eyewall causes the inner eyewall to dissipate rapidly.Finally,the ERC ends with an annular eyewall or spiral rainbands.(2) Although the CE duration times of Typhoon Muifa's three ERCs covered a large range,the CE structures were all maintained for approximately 5 h from the formation of the axisymmetric outer eyewall to the end of the cycle.(3) There is no obvious precipitation reflectivity in the eye or moat region for the subsidence flow.The convection within the two eyewalls is organized as a radially outward slope with increasing height.(4) Typhoon intensity estimation results based on ADT may not explain the intensity variations associated with ERC correctly,while the typhoon's warm core data retrieved from AMSU-A works well.Multisatellite data is used to analyze the characteristics of three eyewall replacement cycles （ERCs） during the lifetime of Typhoon Muifa （1109）. Spiral rainbands evolutions, concentric eyewall （CE） structure modes, CE durations, and intensity changes are discussed in detail. In addition, an ERC evolution model of Typhoon Muifa is given. There are four main findings. （1） The outer spiral rainband joins end to end to form the outer eyewall after it disconnects from the original （inner） eyewall. The inner eyewall weakens as the outer eyewall becomes axisymmetrie and is intensified. The contraction of the outer eyewall causes the inner eyewall to dissipate rapidly. Finally, the ERC ends with an annular eyewall or spiral rainbands. （2） Although the CE duration times of Typhoon Muifa＇s three ERCs covered a large range, the CE structures were all maintained for approximately 5 h from the formation of the axisymmetric outer eyewall to the end of the cycle. （3） There is no obvious precipitation reflectivity in the eye or moat region for the subsidence flow. The convection within the two eyewalls is organized as a radially outward slope with increasing height. （4） Typhoon intensity estimation results based on ADT may not explain the intensity variations associated with ERC correctly, while the typhoon＇s warm core data retrieved from AMSU-A works well.

关 键 词：SATELLITE data super TYPHOON CONCENTRIC EYEWALL EYEWALL REPLACEMENT cycle intensity VARIATIONS 

分 类 号：P444[天文地球—大气科学及气象学]