摘要
利用2008年3月～2011年9月西南地区航空器空中报告，NCEP再分析资料及机场雷达和自动观测资料，对西南地区低空风切变事件进行统计分析，并讨论成都、昆明、贵阳、拉萨和丽江机场低空风切变事件的影响天气系统：西南地区低空风切变事件发生的时间主要集中在春季和夏季，昆明机场风切变事件最多，并且强的低空风切变报告最多，热低压和低空急流是昆明机场低空风切变的主要影响系统，68％的风切变与之有关；拉萨的低空风切变主要受到高空槽过境影响，云贵准静止锋是贵阳机场的主要影响系统；成都机场的低空风切变事件主要是由于对流单体或者雷暴触发的阵风锋引起；利用多普勒雷达能有效检测和预警由阵风锋产生的低空风切变。
This article used pilot reports about low - level wind shear events in the southwest airports, NCEP reanalysis da- ta, airport Doppler radar and automatic observation data from March 2008 to September 2011. According the statistical analysis and discussion, there were more low- level wind shear events occurred in spring and summer, especially the most serious low - level events occurred at Kunming airport and the thermal low pressure and low level jet are the main impact system. There were 68% of wind shear events related them. The reason of low level wind shear occurred in Lhasa mainly were the trough effects. The quasi - stationary front was the main impact system in Guiyang airport. One of the main factors affecting the Chengdu airport was gust front triggered by thunderstorm. The Doppler radar can be used to detect and warn the low - level wind shear events at Chengdu airport.
出处
《高原山地气象研究》
2013年第3期37-42,共6页
Plateau and Mountain Meteorology Research
关键词
低空风切变
热低压
阵风锋
多普勒雷达
low -level wind shear, thermal low pressure, gust front, Doppler radar
