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  • ISSN 1000-694X
  • 双月刊 创刊于1981年
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天气与气候

中国西北地区东部短时强降水时空特征

  • 白晓平 ,
  • 靳双龙 ,
  • 王式功 ,
  • 尚可政 ,
  • 赵璐
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  • 1. 中国人民解放军94195部队, 甘肃 定西 730500;
    2. 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;
    3. 中国电力科学研究院 新能源与储能运行控制国家重点实验室, 北京 100192;
    4. 成都信息工程大学 大气科学学院/高原大气与环境四川省重点实验室, 四川 成都 610225;
    5. 甘肃省地震局, 甘肃 兰州 730000
白晓平(1987-),男,甘肃秦安人,硕士研究生,主要从事干旱气候与灾害气象研究。E-mail:baixp05@163.com

收稿日期: 2016-12-26

  修回日期: 2017-02-22

  网络出版日期: 2018-03-20

基金资助

国家电网公司总部科技项目;国家自然科学基金重大研究计划重点支持项目(91644226);国家基础科技条件平台建设项目(NCMI-SBS17-201707,NCMI-SJS15-201707)

Spatio-temporal Characteristics of the Short-time Heavy Rainfall in the East of Northwest China

  • Bai Xiaoping ,
  • Jin Shuanglong ,
  • Wang Shigong ,
  • Shang Kezheng ,
  • Zhao Lu
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  • 1. Unit 94195 of PLA, Dingxi 730500, Gansu, China;
    2. College of Atmospheric Sciences/Ministry of Education Key Laboratory of Semi-Arid Climate Change, Lanzhou University, Lanzhou 730000, China;
    3. State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems, China Electric Power Research Institute, Beijing 100192, China;
    4. College of Atmospheric Sciences/Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, Chengdu University of Information Technology, Chengdu 610225, China;
    5. Earthquake Administration of Gansu Province, Lanzhou 730000, China

Received date: 2016-12-26

  Revised date: 2017-02-22

  Online published: 2018-03-20

摘要

基于中国西北地区东部136个气象站2001-2011年每6 h地面降水常规观测资料、1 674个自动站2009-2011年逐时降水资料,运用气候统计、线性趋势、归一化、分区域统计以及降水集中度(PCD)和集中期(PCP)分析等方法,研究了西北地区东部短时强降水的时空分布和气候特征。结果表明:该地区短时强降水日数年际变化不大,但区域性的短时强降水过程呈明显增加趋势;短时强降水主要发生在7月上旬至8月下旬,且具有明显的日变化特征;短时强降水总频次的空间分布与地势分布比较一致,高频高值区多位于夏半年环流盛行西南气流的迎风坡附近;在空间上PCD由东南向西北越来越集中,PCP自东向西逐步推迟。

本文引用格式

白晓平 , 靳双龙 , 王式功 , 尚可政 , 赵璐 . 中国西北地区东部短时强降水时空特征[J]. 中国沙漠, 2018 , 38(2) : 410 -417 . DOI: 10.7522/j.issn.1000-694X.2017.00006

Abstract

In this paper, the spatio-temporal distribution and climate characteristics of short-time heavy rainfall in the east of Northwest China is studied based on every 6h rainfall observation data of 136 meteorological stations in the east of Northwest China from 2001 to 2011 and hourly precipitation data from 2009 to 2011 of 1674 automatic meteorological stations, by using climate statistical analysis, linear trend analysis, normalized analysis, subregional of statistics analysis, precipitation concentration degree (PCD) and precipitation concentration period (PCP) analysis. Results showed that the short-time heavy rainfall days interannual change is unobvious, but the regional short-time heavy rainfall process has increased significantly; the short-time heavy rainfall is mainly happened from early July to late August, and it has obvious diurnal variation; the spatial distribution of the short-time heavy rainfall frequency is accordant with the topography distribution, and high frequency area is located near the windward side of summer half year circulation prevailing southwest airflow; the PCD is more and more concentrated from southeast to northwest, and the PCP gradually postponed from east to west in the space.

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