摘要
文章利用NCEP 1°×1°再分析资料、常规高空资料和成都双流机场气象观测资料对2010~2019年发生在成都双流机场的初雷天气进行统计分析。结果表明:初雷多出现在4月,大都出现在下午到夜间,以夜间最多(20时~03时)。70%的初雷持续时间在2个小时以内,强度总体较弱,伴随的降水较少。影响初雷的天气系统主要为高空槽和中低层切变线。层结上总体呈现出"近地面干、中低层湿、高层干"的层结特征,850hPA、700hPA多在四川东部、南部出现水汽辐合区。K指数、假相当位温θse与初雷持续时间有较好的对应关系。
Based on NCEP 1° ×1° reanalysis data, routine upper-air meteorological data, and the observations data of Chengdu Shuangliu International Airport during the years 2010-2019, characteristics of first thunder storms were analyzed statistically.The results show that most of first thunderstorms occur in April, they mostly occur from afternoon to after midnight, especially during the night(20:00~03:00). 70% of first thunderstorms last less than 2 hours, there are smaller rainfall and the intensities are weak. Upper trough, middle and low levels shear lines are the main synoptic system of generating first thunderstorms. The states of atmospheric stratification always showthe characteristics of "being dry near surface layer, wet in middle-low layer, and dry in upper layer". Water vapor convergence zones of 850 hPA and 700 hPA always appear in the east and west of Sichuan province. The correspondence relation between duration of first thunderstorm and K index, potential pseudo-equivalent temperature(θse) has been found.
出处
《科技创新与应用》
2020年第26期74-75,79,共3页
Technology Innovation and Application
关键词
初雷
统计分析
物理量
特征
双流机场
first thunderstorm
statistical analysis
physical quantities
characteristics
Chengdu Shuangliu International Airport
