The temporal and spatial distribution characteristics,physical parameters,and fallout fore-casts of strong convection under different weather typologies in Shandong peninsula from 2015 to 2020 were analyzed and studied.The results showed that:strong convective weather mainly occurred under five weather situations,namely,low trough,high-altitude cold vortex,northwesterly flow,edge of the sub-tropical height and transverse trough;strong convective weather events mainly concentrated in June-August,and were most likely to occur in the afternoon to the nighttime,and were mostly uneven-ly distributed;the spatial distribution mainly exhibited four characteristics,namely,western-type,eastern-type,area-wide-type,and local-type,with local-type events being the most frequent.The physical parameter characteristics differed greatly among different weather situation configurations,and the physical parameter characteristics varied greatly among different weather situations.The physical parameters of different weather configurations varied greatly,with the CAPE value and K index of the sub-tropical height edge type being larger than those of other situations,the vertical wind shear SHR6 and the total index TT of the high-altitude cold vortex type being the largest,the CAPE value and K in-dex of the northwesterly flow type being small,and the SI value being positive.Strong convection caused by weak cold fronts and sea-breeze fronts was most likely to occur in the western part of Yantai,and then moved eastward to become weaker,and the eastern type was more likely to happen at night.The eastern type mostly occurred at night,mostly due to the influence of the surface convergence line,and the different positions of the inversion trough also determined the different fallout areas of the strong convection.The region-wide type mainly occurred under the influence of the upper-air cold vor-tex or the strong trough cold front;the local type corresponded to the edge of the subduction plateau and the northwesterly airflow type,with the surface convergence line as the main triggering system,which had a very good correlation with the sea-land topography and the mountainous topography.
severe convective weatherweather classificationphysical quantityfalling zone forecast
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NSTL
万方数据
