气象与环境学报2017，Vol.33Issue(6)：49-57,9.DOI:10.3969/j.issn.1673-503X.2017.06.007
大连地区雷暴大风的气候和天气学特征
Climatic and synoptic characteristics of thunderstorm gale in Dalian region
摘要
Abstract
Based on the observation data of thunderstorm gale,thunderstorm,hail and other weather phenomena in the region of Dalian region from 1999 to 2013 , the climatic and synoptic characteristics of thunderstorm gale in Dalian were analyzed. The results reveal that occurrence regularity of thunderstorm gale in Dalian has a strong re-gional characteristic. The occurrence frequency at night is significantly higher than that at daytime. The number of thunderstorm gales happened on the island stations is significantly greater than that on the land stations. Thunder-storm gales mainly occur in summer. In addition,October is also the time when thunderstorm gales happened fre-quently. Statistics analyses show that the thunderstorm gales often occur in the thunderstorm groups which have a large spatial scale and time scale in Dalian region,and the probability that a single thunderstorm cell causes thun-derstorm gales is very low. Mostly,the occurrence of thunderstorm gales accompanies with rainfall,while the oc-currence of thunderstorm gale rainstorm or hail simultaneously is rare. The thunderstorm gales in Dalian region are usually formed by the combination of many favorable configurations of upper and lower altitude systems,jet stream at upper and lower level and dry air at middle and upper altitude. The most important factors that control the gener-ation of thunderstorm gale are jet streams at the upper level and dry air at the middle and upper altitude. The jet stream at an upper level sometimes controls the location and the distributing pattern of the thunderstorm gale. Thunderstorm gales in Dalian region usually located at the areas near and down the axis of the upper level jet stream. There are three functions for dry air at the middle and upper altitude,i. e. enhancing the atmospheric insta-bility,forming a very strong dew-point front at the junction of dry and wet areas and sometimes triggering thunder-storms,and enhancing the ascending motion when it superposes with other weather systems.关键词
干空气/急流/稳定度/露点锋/上升运动Key words
Dry air/Jet stream/Stability/Dew-point front/Ascending motion分类
天文与地球科学引用本文复制引用
杨景泰,隋玉秀,王健,周美娥,于德华,孙立娟,潘玉成..大连地区雷暴大风的气候和天气学特征[J].气象与环境学报,2017,33(6):49-57,9.基金项目
国家自然科学基金项目(41171137)资助. （41171137）
