干旱气象

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一次强对流过程的多普勒雷达反演及预 警分析

韩文宇1, 2杨丽丽1, 2杨 毅1, 2   

  1. 1. 兰州大学大气科学学院/半干旱气候变化教育部重点实验室, 甘肃 兰州 730000;
    2. 甘肃省干旱气候变化与减灾重点实验室, 甘肃 兰州 730020
  • 出版日期:2014-10-08 发布日期:2014-10-08
  • 作者简介:韩文宇(1990-),女,甘肃省会宁县人,硕士研究生,主要研究方向为多普勒雷达资料的反演及同化.E-mail:hld0122@sina.com
  • 基金资助:

    公益性行业(气象)科研专项“西北地区复杂地形下雷暴及短时强降水预报预警关键技术研究(GYHY201306006)”、国家自然科学基金“闪电定位网资料同化技术研究(41175092)”及兰州大学中央高校基本科研业务费专项资金(lzujbky-2013-111)共同资助

Retrieval of Doppler Radar Data and Warning Analysis During a Severe Convection Process

HAN Wenyu 1, 2YANG Lili 1, 2YANG Yi 1, 2   

  1. 1. College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China;
    2. Key Laboratory of Arid Climatic Changing and Reducing Disaster of Gansu Province, Lanzhou 730020, China
  • Online:2014-10-08 Published:2014-10-08

摘要:

为进一步了解2009年6月5日发生在安徽的一次飑线天气过程的流场结构,本文将两步变分法应用于安徽省合肥多普勒天气雷达资料的风场反演,并利用反演结果检验发生冰雹、大风以及闪电等强对流天气过程的预警条件。结果表明,该次天气过程主要受到东北冷涡的影响,另外高空西北冷气流和地面暖气流以及深层的垂直风切变促进了该次飑线强对流天气的发生;冰雹、大风以及闪电等强对流天气对应的一些特征量关系符合相关预警条件。

关键词:
多普勒雷达,
反演, 强对流, 冰雹, 大风, 闪电|预警

Abstract:

In order to make a further acquaintance about flow structure of a squall line that happened on June 5,2009 in Anhui Province,a two-step variational method was used to retrieve the wind field based on Hefei Doppler radar data.The derived winds and reflectivity were used to examine the early warning conditions about the strong convective weather such as hail,strong winds and lightning.The results indicate that the weather process was mainly influenced by the northeast cold vortex. Moreover,the northwest cold air current in the high altitude,southeast warm air in the low altitude and vertical wind shear promoted this strong convection weather process.The relevant characteristic parameters to some strong convective weather such as hail,strong wind and lightning were proved to be in accord with the early warning conditions for this squall line weather.

Key words: Doppler radar, retrieval, severe convection, hail, strong wind, lightning, warning

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