自然资源学报 ›› 2014, Vol. 29 ›› Issue (4): 666-676.doi: 10.11849/zrzyxb.2014.04.011

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近50 a来广西各级降水气候变化特征分析

覃卫坚1,2, 李栋梁1   

  1. 1. 南京信息工程大学气象灾害预报预警与评估协同创新中心, 南京210044;
    2. 广西壮族自治区气候中心, 南宁530022
  • 收稿日期:2013-03-07 修回日期:2013-09-16 出版日期:2014-04-20 发布日期:2014-04-20
  • 作者简介:覃卫坚(1971-),男,广西上林县人,博士研究生,高级工程师,主要从事天气气候动力学研究。E-mail:qinweijian2008@126.com
  • 基金资助:

    国家重点基础研究发展计划(973 计划)项目(2013CB430202);广西自然科学基金资助(2013GXNSFBB053010,2013GXNSFAA019273)。

A Study on the Climate Change Characteristics of All Kinds of Precipitation Events in Recent 50 Years of Guangxi

QIN Wei-jian1,2, LI Dong-liang1   

  1. 1. Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044, China;
    2 Guangxi Climate Center, Nanning 530022, China
  • Received:2013-03-07 Revised:2013-09-16 Online:2014-04-20 Published:2014-04-20
  • About author:10.11849/zrzyxb.2014.04.011

摘要:

利用1961—2012 年广西80 个地面气象观测站的降水资料,分析广西各级降水的气候趋势特征,结果得到:春季大雨和中雨降水占总雨量百分率最大;夏季暴雨百分率最大,其次为大雨和中雨,最小为小雨;秋季中雨百分率最大,其次为小雨和大雨,最小为暴雨;冬季小雨百分率最大,其次为中雨和大雨,最小为暴雨。小雨雨量占总雨量的百分率在春夏季广西大部地区呈减小趋势;中雨雨量百分率在春夏季有减小的变化趋势,秋冬季变化趋势不明显;大雨雨量百分率在春夏秋季变化趋势不明显,冬季有增大的趋势;广西大部分地区暴雨雨量百分率在一年四季里均有增多的趋势,尤其在夏季增多趋势最明显。总的来看,广西的降水结构有向极端强降水转移的发展趋势。

关键词: 气候变化, 广西, 降水, 气候趋势系数

Abstract:

Based on daily rainfall dataset of 80 stations in Guangxi during the period of 1961-2012, the trends in all kinds of precipitation events in Guangxi are primarily studied in this paper. The results show that the percentage of heavy rain accounted for the largest, followed by moderate rain in spring. In summer, the percentage of rainstorm presented the largest, followed by heavy rain and moderate rain, and the minimum was the light rain. In fall, the percentage of moderate rain was the largest, followed by light rain and heavy rain, the rainstorm was the minimum. In winter, the percentage of light rain was the largest, followed by moderate rain and heavy rain, the rainstorm was the minimum. The percentage of light rain precipitation indicated downward trend in spring and summer. Moderate rain percentage showed a downtrend in spring and summer. As regard to the trend of heavy rain, it presented an increasing trend in winter while the trend was not obvious in the other three seasons. The studied results also showed that there was a significant increase in the percentage of rainstorm throughout the year, especially in summer. In general, the precipitation structure in Guangxi manifested as an increase in the extreme heavy precipitation.

Key words: climate tendency coefficient, Guangxi, precipitation, climatology

中图分类号: 

  • P466