Impact of Westerly Jet on Rainstorm Occurred in Northwestern Shandong Province
JIA Wentao
SUN Jilin
GAO Shanhong
Abstract：A diagnostic calculation, numerical simulation and mechanism analysis were made for the heavy rain occurred in northwestern Shandong Province on BST 3 August 2015, which were based on the WRF meso-scale numerical model and FNL data.The study showed that the potential heat transferred by westerly jet stream and the mesoscale gravity wave along south jet stream both affected the rainstorm.The potential heat in upstream can be transferred to downstream by westerly jet and cause non-adiabatic heating in Binzhou, which can lead to warm advection and anticyclonic vorticity increase.Mesoscale gravity wave may occur in south of westerly jet stream and spread along the jet, and its wave crest may promote the release of unstable energy and raise a strong convective weather.
Keywords：RainstormUpper-level jet streamWRFMeso-scale gravitational wavePotential heat
Publication Date：2018-01-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：8( 13-20 )