Diagnostic Analyses and Numerical Modeling of Explosive Cyclone over Northwestern Pacific on January 11-13,2012  

作　　者：WANG Guanlan SUN Baitang SUN Yawen LI Pengyuan 

机构地区：[1]National Meteorological Center,Beijing 100081,China [2]College of Oceanic and Atmospheric Sciences,Ocean University of China,Qingdao 266100,China

出　　处：《Journal of Ocean University of China》2022年第4期935-945,共11页中国海洋大学学报（英文版）

基　　金：This study is supported by the National Key R&D Program of China(Nos.2017YFC1404100 and 2017YFC 1404101);the National Natural Science Foundation of China(Nos.41305086,41775042 and 41275049).

摘　　要：In this paper,we use FNL grid data obtained from the National Centers for Environmental Prediction(NCEP)to analyze an explosive cyclone(EC)that occurred over the northwestern Pacific Ocean from January 11 to 13,2012.To simulate the EC,we used the Weather Research and Forecasting model(WRFV3.5).The cyclone outbreak occurred east of Japan from January 11 to 12 and weakened near the Kamchatka Peninsula on January 13.The analysis results show a distinct frontal structure,in which the high potential vorticity(PV)of the upper troposphere extends downward to the surface,which can facilitate EC development.A low-level jet stream develops with the EC,which can lead to more distinct convergence.The results of sea surface temperature(SST)sensitivity tests suggest that changes in the SST can affect cyclone intensity,but have little effect on its path.When small changes are made to the SST,the air pressure at the cyclonic center responds more distinctly to an increased SST than a decreased SST.The results of our latent heat release test suggest that diabatic heating processes lead to maximum PV values in the lower troposphere.Latent heat is also one of the important factors influencing EC development.

关 键 词：northwestern Pacific explosive cyclone diagnostic analyses SST sensitivity tests latent heat release test 

分 类 号：P732.3[天文地球—海洋科学]