Diagnosis and Numerical Modeling of an Explosive Cyclone over the Northwestern Pacific  

作　　者：SUN Baitang LI Pengyuan ZHANG Shuqin GUO Jingtian FU Gang 

机构地区：[1]Laixi Meteorological Bureau,Qingdao 266622,China [2]College of Oceanic and Atmospheric Sciences,Ocean University of China,Qingdao 266100,China [3]College of Ocean and Meteorology,Guangdong Ocean University,Zhanjiang 524008,China [4]North Marine Forecasting Center,Ministry of Natural Resources,Qingdao 266100,China

出　　处：《Journal of Ocean University of China》2021年第4期837-847,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.41775042 and 41275049).

摘　　要：An explosive cyclone that took place over the Northwestern Pacific from 12 UTC 18 to 18 UTC 21 November 2007 was investigated.The synoptic situations and structure of this cyclone were documented by using the 1°×1°final analysis data of the National Center for Environmental Prediction.This cyclone developed explosively around 18 UTC 19 and reached its maximum deepening rate(MDR,1.3 Bergeron)around 06 UTC 20 November 2007.At its MDR moment,the surface cyclone center was located in the downstream of the upper-level trough and northern entrance zone of the upper-level jet.The diagnosis using Zwack-Okossi equation suggested that cyclonic-vorticity advection and warm air advection acted to deepen this cyclone,while adiabatic cooling suppressed its development.In an investigation of this cyclone development,numerical sensitivity results obtained by using the Weather and Research Forecasting model showed that the latent heat release in the lower level had less contribution,whereas the surface sensible and latent fluxes played important roles.With a warmer ocean surface,the cyclone tended to intensify.Two topography tests were designed to examine the mountain influences on the development of this cyclone:removing a mountain and doubling the height of a mountain.Results show that the Changbai Mountains suppressed the development of the cyclone by preventing the southern moisture air from invading the inland.Without the moisture air,no latent heat release occurs when this cyclone passes over the Changbai Mountains.

关 键 词：explosive cyclone Changbai Mountains Zwack-Okossi equation WRF model 

分 类 号：P732.3[天文地球—海洋科学]