Energetics characteristics accounting for the low-level wind’s rapid enhancement associated with an extreme explosive extratropical cyclone over the western North Pacific Ocean

作     者：JIN Shuanglong FENG Shuanglei SHEN Wei FU Shenming JIANG Lizhi SUN Jianhua JIN Shuanglong;FENG Shuanglei;SHEN Wei;FU Shenming;JIANG Lizhi;SUN Jianhua

作者机构：State Key Laboratory of Operation and Control of Renewable Energy and Storage SystemsChina Electric Power Research InstituteBeijingChina Power Equipment Status Evaluation DepartmentElectric Power Research Institute of the State Grid Shaanxi Electric Power CompanyXi’anChina International Center for Climate and Environment SciencesInstitute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina Laboratory of Cloud–Precipitation Physics and Severe StormsInstitute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina 

出 版 物：《Atmospheric and Oceanic Science Letters》 (大气和海洋科学快报（英文版）)

年 卷 期：2020年第13卷第5期

页      面：426-435页

核心收录：

学科分类：07[理学] 070601[理学-气象学] 0706[理学-大气科学] 

基　　金：supported by the National Key R&D Program of China grant number 2018YFC0809400 the National Natural Science Foundation of China grant numbers41775046 and 91637211 the Youth Innovation Promotion Association,Chinese Academy of Sciences 

主　　题：Explosive extratropical cyclone rotational wind divergent wind kinetic energy twin cyclones 

摘      要：During mid-January 2011,a rarely seen twin-extratropical-cyclone event appeared over the western North Pacific *** of the twin cyclones developed into an extreme explosive extratropical cyclone(EEC),which was comparable to the intensity of a *** and divergent wind kinetic energy(KE)analyses were applied to understand the low-level wind’s rapid enhancement associated with the *** was found that:(i)the total wind KE associated with the EEC showed a remarkable enhancement in the lower troposphere during the cyclone’s maximum development stage,with the maximum/minimum wind acceleration appearing in the southeastern/northwestern quadrant of the EEC;(ii)the rotational wind KE experienced an obvious increase,which corresponded to the total wind KE enhancement,whereas the divergent wind KE,which was much smaller than the rotational wind,mainly featured a decreasing trend;(iii)the rotational wind KE enhancement showed variational features consistent with the horizontal enlargement and upward stretching of the EEC;(iv)the nonorthogonal wind KE enhanced the total wind KE in regions with strong rotational wind,which resulted in the maximum lower-tropospheric maximum wind,whereas in regions with strong divergent wind it mainly reduced the total wind KE;(v)the northward transport of total wind KE and the rotational wind KE production due to the work done by pressure gradient force were dominant factors for the enhancement of winds associated with the EEC,particularly in its southeastern *** contrast,an overall conversion from rotational wind KE to divergent wind KE decelerated the rotational wind enhancement.