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南疆短时强降水概念模型及环境参数分析
黄艳1, 俞小鼎2
(1.和田地区气象台;2.中国气象局干部培训学院)
Analysis Conceptual Models and Environmental Parameter Of Short-Time Heavy Rainfall in Southern
HUANG yan1, Yu-xiaoding2
(1.Hetian Meteorological Bureau;2.China Meteorological Administration Training Centre)
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投稿时间:2017-09-13    修订日期:2018-02-21
中文摘要: 利用南疆2010-2016年自动气象站及区域自动气象站逐小时降水量资料,NCEP/NCAR 1°×1°再分析资料以及探空资料,分析不同强度的短时强降水的时空分布得出南疆短时强降水事件的天气型有明显的季节性特点和区域性特征。总结了典型短时强降水过程的环境背景场特征,建立了短时强降水的三种概念模型:中亚低槽(涡)型、西伯利亚低槽(涡)型和西风短波型。通过7个探空站的温湿廓线形态、地面露点温度、 T850-T500、T700- T500、对流有效位能CAPE、对流抑制CIN、抬升凝结高度、0~6km垂直风切变等分析了南疆短时强降水的环境背景:短时强降水I型(整层湿)、短时强降水II型(上湿下干)和短时强降水III型(上干下湿)发生前大气水汽含量充沛、存在一定的对流有效位能CAPE和较明显的垂直风切变以及0℃层高度偏低、暖云层厚度偏厚等特征,而合适的对流抑制CIN,有利于对流不稳定能量的积聚和爆发,促进短时强降水的发生;短时强降水IV型(干绝热型)存在大气层结较干和较大的T 850-T500、T 700-T500;I型和II型是南疆短时强降水的主要类型,常出现在南疆中部、西部地区的盛夏和夏末,多为西伯利亚低值系统(低涡、低槽)型和中亚低值系统(低涡、低槽)型影响。
中文关键词: 南疆  短时强降水  概念模型  环境参数
Abstract:The temporal and spatial distribution of short-term and severe rainfall with different intensities was analyzed by using the automatic weather station and the regional automatic weather station hourly precipitation data, the NCEP / NCAR 1° × 1° reanalysis data and the sounding data during 2010-2016. It is concluded that the weather pattern of the short-term heavy rainfall event in southern Xinjiang has obviously seasonal and regional characteristics. Based on the characteristics of the environmental background of typical short-term heavy rainfall, three conceptual models of short-term and severe rainfall were established: Central Asia low-trough (vortex) type, Siberian low-trough (vortex) type and westerly short-wave type. The environmental background of the short-term heavy rainfall event in southern Xinjiang was analyzed through the temperature and humidity profiles of seven sounding stations, ground dew point temperature, T 850-T500, T700-T500, convective available potential energy, inhibitory potential energy, uplift condensation height, 0~6km vertical wind shear etc. For Short-term heavy rainfall type I (whole layer wet), short-term heavy rainfall type II (under the wet dry) and short-term heavy precipitation type III (upper dry wet) before the occurrence of abundant atmospheric water vapor, there is a certain convective effective potential energy CAPE and warm cloud thickness, the more obvious vertical wind shear and 0 ° C layer height is low, thick warmth cloud thickness and other characteristics, The appropriate inhibitory potential energy is favorable for the accumulation and explosion of the convective instability energy, and promotes the occurrence of short-term heavy rainfall. For short-term heavy rainfall type IV (dry adiabatic), the atmospheric stratification is relatively dry, and the T850-T500 and T700-T500 are relatively high. The type I and Type II are the main types of short-term heavy rainfall in southern Xinjiang. (Low vortex, low trough) type and low-value system in Central Asia (low vortex and low trough) type in the middle and southern regions of the southern part of China.
文章编号:201709130420     中图分类号:    文献标志码:
基金项目:新疆维吾尔自治区青年科技创新人才培养工程QN2016JC0771、中央级公益性科研院所基本科研IDM201600共同资助1
引用文本:
黄艳,俞小鼎,.[en_title][J].Meteor Mon,():-.
HUANG yan,Yu-xiaoding,.Analysis Conceptual Models and Environmental Parameter Of Short-Time Heavy Rainfall in Southern[J].Meteor Mon,():-.