摘要
高原涡、高原切变线是影响高原地区最主要的天气系统。利用2005-2016年NCEP/CFSR高分辨率再分析资料,采用客观识别方法,统计分析了高原涡、高原切变线伴随发生的数量、生成的先后顺序和源地等。结果表明,近12年来,客观识别的高原涡年平均生成45个,高原切变线年均生成48条,30%左右的高原涡与高原切变线伴随出现,相伴出现的现象在整个高原均有发生。两者伴随出现时,高原切变线往往先于高原涡生成;当高原涡伴随高原切变线出现时,高原切变线的维持时间较长;而无论是否有高原切变线伴随,高原涡的维持时间基本保持不变。
Qinghai-Tibetan Plateau vortex（QTPV） and Qinghai-Tibetan Plateau Shear Line（QTPSL） as the main weather system affect the plateau region.Using NCEP/CFSR high resolution reanalysis data from 2005 to 2016 to objectively identify QTPV and QTPSL,statistics both concurrent number,generated sequence,and source and so on.The results are as follows： the objective identification QTPV were 45 at an average annual rate in the last 12 years,the QTPSL were 48 at an average annual rate,about 30% QTPV and QTPSL occurred concurrently.The phenomenon of QTPV and QTPSL appears in the whole plateau.When the two appear together,QTPSL usually takes place before the QTPV.When QTPV appears,QTPSL will maintain for a long time,and whether there is QTPSL,QTPV＇s holding time remain unchanged.
作者
刘自牧
李国平
张博
LIU Zimu;LI Guoping;ZHANG BO(School of Atmosphere Sciences,Chengdu University of Information Technology,Chengdu 610225,Sichuan,China;Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters,Nanjing 210044,Jiangsu,China;College of Air Traffic Management,Civil Aviation Flight University of China,Guanghan 618300,Sichuan,China)
出处
《高原气象》
CSCD
北大核心
2018年第5期1233-1240,共8页
Plateau Meteorology
基金
国家自然科学基金项目(41675057
41765003
41675042)
关键词
高原涡
高原切变线
客观识别
伴随出现
Qinghai-Tibetan Plateau vortex （QTPV）
Qinghai-Tibetan Plateau shear line （QTPSL）
objective identification
concurrently
