2016-2021年山东省大风时空分布特征分析OA北大核心CSTPCD

In this paper,the temporal and spatial characteristics of strong winds in Shandong Province from 2016 to 2021 were investigated by using the hourly wind data observed from 1 886 meteorological stations and the objective reanalysis ERA5 data issued by European centre for medium-range weather forecasts(ECMWF).It is found that annual average of 1 476 stations experienced strong winds for gale force 8 and above in Shandong Province.Strong winds in spring accounted for about 40.1%of the year.Annual average exceeded 1 000 stations around 10:00-17:00 BJT,with the highest frequency of strong winds around 14:00 BJT.The northerly winds accounted for about 79.3%,and their most occurrence direction were in NNW direction.Northern coastal area of Shandong Province was the highest occur-rence frequency regions of strong winds,over 30 occurrences per station.The southern coastal region and the central mountain region of Shandong Province had experienced 10～30 times.There are 14 sta-tions with strong winds for forces 13 and above,and 64 stations for forces 12 and above during 6 years(2016-2021),of which dominated by thunderstorm winds.The maximum wind speed was 39.9 m/s at Zhangqiu Station.The most dominantly strong winds affected by weather systems were caused by ex-plosive cyclone.The distribution of strong winds was related to the moving paths and intensities of low-pressure systems.The upper-level cold vortex was the main influencing weather system for strong winds with thunderstorm,of which under the influence of northeast cold vortex up to 63.6%.Then the second one was affected by the low-trough system.The front and back trough patterns had different in-fluences on severe convective weather in Shandong.