img

官方微信

  • CN 62-1070/P
  • ISSN 1000-694X
  • 双月刊 创刊于1981年
高级检索
天气与气候

2012年7月下旬河套地区4次切变暴雨的对比分析

  • 德勒格日玛 ,
  • 李一平 ,
  • 韩经纬 ,
  • 祁伏裕 ,
  • 王根
展开
  • 1. 南京信息工程大学, 江苏 南京 210044;
    2. 内蒙古自治区气象台, 内蒙古 呼和浩特 010051
德勒格日玛(1981- ),女,内蒙古鄂尔多斯市人,博士研究生,研究方向为短期天气气候预报分析、气象灾害风险评估。Email:gerima_dele@yahoo.cn

收稿日期: 2012-12-07

  修回日期: 2013-03-29

  网络出版日期: 2014-01-20

基金资助

中国气象局预报员专项(CMAYBY2013-011);国家公益性行业(气象)科研专项(GYHY201106019)资助

Comparative Analysis of Four Shear Rainstorm Processes in July of 2012 in Hetao Area of Inner Mongalia, China

  • Dele Gerima ,
  • Li Yiping ,
  • Han Jingwei ,
  • Qi Fuyu ,
  • Wang Gen
Expand
  • 1. Nanjing University of Information Science & Technology, Nanjing 210044, China;
    2. Inner Mongolia Meteorological Observatory, Hohhot 010051, China

Received date: 2012-12-07

  Revised date: 2013-03-29

  Online published: 2014-01-20

摘要

应用日常预报业务中可以方便使用的常规观测资料、数值预报产品、卫星云图、加密自动站观测资料以及雷达资料等,从环流背景、流型配置、物理机制等方面对比分析了河套地区4次暴雨过程,旨在提高对暴雨的短期预报预测能力及短时强降水的临近预警能力。分析发现:(1)副热带高压西侧的偏南气流以及来自孟加拉湾的暖湿偏南气流在35°—40°N与来自高纬度的干冷的偏北气流多次交汇,水汽在该带中明显辐合,为河套地区持续性暴雨发生发展提供源源不断的水汽,提供水汽辐合上升动力条件;(2)暴雨落区与低层的显著流线出口区或急流出口区的位置、切变线的位置密切相关,暴雨一般落在高空急流的右侧、低空急流的左侧;(3)暴雨天气出现前一般会出现500 hPa以下θ随高度的增加而减少的特征;(4)暴雨天气出现前一般都会出现风随高度顺转的特征;(5)暴雨过程中地面辐合线起到动力抬升作用,触发中小尺度系统的生成和发展;(6)抬升凝结高度和自由对流高度都比较低,利于水汽凝结,而平衡高度较高,利于能量的积累,对于对流天气的预报有较好的指示意义。

本文引用格式

德勒格日玛 , 李一平 , 韩经纬 , 祁伏裕 , 王根 . 2012年7月下旬河套地区4次切变暴雨的对比分析[J]. 中国沙漠, 2014 , 34(1) : 233 -243 . DOI: 10.7522/j.issn.1000-694X.2013.00304

Abstract

The atmospheric circulation pattern, the physical mechanism of four rainstorm events are analyzed over Hetao area of Inner Mongolia by routine observational data, numerical forecast product, satellite cloud images, automatic weather station's data and radar data. These data mentioned above is easy and convenient access in daily forecast business. The purpose of the comparative analysis of the four rainstorm events is to discuss the predictability of the four rainstorm events and improve short-term forecast ability of the rainstorm and early warning capability of short-term strong precipitation. (1) The warm and wet southerly wind from the Bay of Bengal and west side of West Pacific Subtropical High meets with the dry and cold air from higher latitude over 35°-40° N, and the water vapor in the zone has obvious convergence, the premise condition provide a steady stream of water vapor sources and water vapor flux convergence, which is favorable for persistent rainstorm over Hetao area. (2) The exit region of significant streamline and jet stream and shear line of low level is closely related to rainstorm area; Rainstorm always happens to the right of high level jet and to the left of low level jet. (3) The pseudo-equivalent potential temperature usually decreases with the increasing height under 500 hPa before rainstorm; (4) The rainstorm usually appears after warm advection. (5) Ground convergence line is favorable for the upward momentum and triggers the meso-microscale system appearance and development during rainstorm process. (6)The lifting condensation level and the level of the free convection are relatively low, which is favorable for vapor condensation, and equilibrium level is relatively high, which is helpful to the accumulation of energy for convection weather, and these are good denotative signals for convective weather.

参考文献

[1] 顾润源.内蒙古自治区天气预报手册[M].北京:气象出版社,2012.
[2] 纪晓玲,陈晓娟,邵建等,等.干旱区一次锋面过境短时暴雨的中尺度分析[J].中国沙漠,2012,32(6):1731-14737.
[3] 谌云,李泽椿.青藏高原东北部区域性大到暴雨的诊断分析及数值模拟[J].气象学报,2005,63(3):289-300.
[4] 王劲松,李耀辉,康凤琴,等.西北区东部一次暴雨的数值模拟试验[J].高原气象,2002,21(3):258-259.
[5] 纪晓玲,桑建人,马筛艳,等.贺兰山东麓宁夏一次极值暴雨过程分析[J].气象科学,2010,30(3):332-337.
[6] 朱伟军,廖芷仪,何清,等.天山暴雨数值模拟的试验研究[J].中国沙漠,2012,32(4):1102-1109.
[7] 魏娜,巩远发,孙娴,等.西北地区近50 a降水变化及水汽输送特征[J].中国沙漠,2010,30(6):1450-1457.
[8] 赵庆云,张武,王式功,等.西北地区东部干旱半干旱区极端降水事件的变化[J].中国沙漠,2005,25(6):904-909.
[9] 丁永红,王文,陈晓光,等.宁夏近44年暴雨气候特征和变化规律分析[J].高原气象,2007,26(3):630-636.
[10] 马晓波,胡泽勇.青藏高原40年来降水变化趋势及突变的分析[J].中国沙漠,2005,25(1):137-139.
[11] 郭江勇,李耀辉,吴红.西北地区春季多雨与少雨年的高空环流特征[J].中国沙漠,2006,26(1):60-64.
[12] 赵庆云,赵红岩,刘新伟.西北东部极端降水事件及异常旱涝季节变化倾向[J].中国沙漠,2006,26(5):745-749.
[13] 李春筱,董治宝,徐永旺,等.内蒙古额济纳旗一次局地大到暴雨的成因分析[J].中国沙漠,2011,31(3):774-779.
[14] 朱乾根,林锦瑞,寿少文,等.天气学原理和方法[M].北京:气象出版社,2007:395.
[15] 俞小鼎,姚秀萍,熊廷南,等.多普勒天气雷达原理与业务应用[M].北京:气象出版社,2006:216.
文章导航

/