广西沿海高温概念模型建立及预报要点分析

Conceptual Model Establishment of High Temperature Weather and Analysis of Forecast Key Points in Coastal Cities of Guangxi

广西沿海高温主要集中在7—8月,并且呈北多南少的特点。通过对38个典型高温个例进行分析,建立了广西沿海高温概念模型,主要有4类:副高+热带气旋型、副高型、副高+西南暖低压型和热带气旋型。增温的形势主要由垂直下沉气流增温及暖平流增温。副高+热带气旋型受到副高底部脊和台风外围的下沉气流增温影响;副高型受到副高控制下的下沉气流增温影响;副高+西南暖低压受到副高控制下的下沉气流增温及西南急流输送的暖平流增温影响;热带气旋型受到台风外围下沉气流增温影响。

Based on the analysis of different weather systems of 34 typical high temperature cases in the coastal areas of Guangxi from 2007 to 2019,conceptual models of high temperature weather in the coastal areas of Guangxi are established in this paper.There are four types:Subtropical High+Tropical Cyclone,Subtropical High,Subtropical High+Southwest Warm Low Pressure and Tropical Cyclone.The warming situation is mainly caused by the vertical downdraft and the warm advection supply by the southwest jet.The Subtropical High+Tropical Cyclone temperature increasing is mainly caused by the downdraft at the bottom of the subtropical high and the periphery of the typhoon.The subtropical high type is mainly affected by the downdraft which is caused by the easterly flow at the bottom of the continental anticyclone or under the control of the subtropical high over the western Pacific.The Subtropical High+Southwest Warm Low Pressure is mainly affected by the downdraft of the subtropical high and the warming transport of southwest jet on the edge of Southwest Warm Low Pressure.The Tropical Cyclone type is mainly affected by the temperature increase caused by the downdraft on the edge of the typhoon.