地理科学 ›› 2008, Vol. 28 ›› Issue (2): 224-228.doi: 10.13249/j.cnki.sgs.2008.02.224

• 论文 • 上一篇    下一篇

增暖背景下中国东北地区极端降水事件的演变特征

杨素英1,2, 孙凤华3, 马建中1   

  1. 1. 中国气象科学研究院, 北京 100081;
    2. 南京信息工程大学, 江苏 南京 210044;
    3. 中国气象局沈阳大气环境研究所, 辽宁 沈阳110016
  • 收稿日期:2007-04-12 修回日期:2007-09-10 出版日期:2008-03-20 发布日期:2008-03-20
  • 通讯作者: 孙凤华, 副研究员。 E-mail:sfh3910839@sina.com
  • 作者简介:杨素英(1975-), 女, 辽宁葫芦岛人, 博士研究生, 从事气溶胶间接气候效应研究。E-mail:yangsuying75@gmail.com
  • 基金资助:
    中国气象局气候变化专项(CCSF2007-17)资助。

Evolvement of Precipitation Extremes in Northeast China on the Background of Climate Warming

YANG Su-Ying1,2, SUN Feng-Hua3, MA Jian-Zhong1   

  1. 1. Chinese Academy of Meteorological Sciences, Beijing 100081;
    2. Nanjing University of Information Science and Technology, Nanjing, Jiangsu 2100441;
    3. Institute of Atmospheric Environment, China Meteorological Dministration, Shenyang, Liaoning 110016
  • Received:2007-04-12 Revised:2007-09-10 Online:2008-03-20 Published:2008-03-20

摘要: 利用中国东北地区93站1959~2002年逐日降水资料,研究该区极端降水事件时空演变特征,结果表明:东北地区极端降水事件阈值由东南沿海向西北内陆逐渐减小,6~9月是极端降水事件集中出现月份;1985~2002年是极端降水事件偏多,且为一突变现象;东北地区短时间内连续发生极端降水事件概率较大,其中1~5天时间间隔极端降水事件占23.7%;80年代中期后东北地区增暖背景下,极端降水事件和有1~5天时间间隔的极端降水事件明显增加,特别是松花江下游和牡丹江流域及西辽河上游地区,频次和强度存在增加或增强趋势。

Abstract: Determination of the threshold by Gamma distribution function and study on spatial and temporal change of precipitation extremes are based on the daily precipitation data of 93 stations during the period 1959-2002 in Northeast China. The main results are summarized as follows: The precipitation extremes’ thresholds decreased gradually from the southeast littoral areas to the northwestern inland. Precipitation extremes were concentrated in June-September, and the increasing was a catastrophe during the period 1985-2002. The probability of the precipitation extremes successively occurred was greater, in which the neighbouring extremes separated by a time gap of 1-5 days was 23.7%. The total extremes increased especially in the lower reaches of the Songhua River and the Mudanjiang River,and the upper reaches of the Liaohe River,as the same with the precipitantion extreme with the time gap of 1-5 days.

中图分类号: 

  • P426