PANG Bo,MAO Wenshu,ZHANG Luying.Climatic Characteristics of Summer Precipitation are Studied in Inner Mongolia in Recent 50 Years[J].Journal of Chengdu University of Information Technology,2019,(04):428-434.[doi:10.16836/j.cnki.jcuit.2019.04.016]
近50年内蒙古夏季降水气候特征分析
- Title:
- Climatic Characteristics of Summer Precipitation are Studied in Inner Mongolia in Recent 50 Years
- 文章编号:
- 2096-1618(2019)04-0428-07
- Keywords:
- meteorology; summer precipitation; climate; space-time change; Inner Mongolia
- 分类号:
- P468.O+24
- 文献标志码:
- A
- 摘要:
- 利用内蒙古气象局提供的1960-2011年共52年具有相对连续数据的46个站点的逐日降水 量资料,针对内蒙古近50年夏季降水、强降水的时空分布及周期变化问题,采用线性拟合线性 趋势估计法、经验正交函数分解(EOF)方法、9点平滑方法、非参数统计检验法及小波分析等 多种统计方法分析,对内蒙古近50年夏季降水气候特征进行了详细分析。研究结果表明:内蒙 古夏季平均降水分布不均匀,夏季降水的均值越大的地区年际起伏也越大。年平均降水和年 际起伏总体都呈现“东高西低”分布特征。发生强降水的平均日数最多的地区也位于内蒙古 东北部呼伦贝尔和兴安盟交界地区,而中部偏北地区和西北则较少。内蒙古夏季降水的时空 变化特征反映出20世纪80年代初到90年代中期内蒙古东部的降水增多,但从90年代中期以后 减少,其在2000年前后存在减小的突变,并且具有5～7年的周期变化。
- Abstract:
- According to the 46 stations with relatively continuous data from 1960 to 2011 provided by Inner Mongolia Meteorological Bureau. The paper aim at the periodic variation of the temporal, spatial distribution of precipitation and heavy precipitation over the past 50 years in Inner Mongolia were studied by using the methods which include the linear fitting linear trend estimation method, EOF method, 9-point smoothing method, Mann-Kendall and wavelet analysis. The results show that the average summer precipitation in Inner Mongolia is uneven, and the annual average fluctuation of the summer precipitation is larger. The annual average precipitation and the annual fluctuations are generally characterized by the distribution of “east high and low west”. The area with the highest number of days with strong precipitation is also located in the border area of Hulunbeier and Xing’an League in northeastern Inner Mongolia, while the north and northwest regions are less. The temporal and spatial variation characteristics of summer precipitation in Inner Mongolia reflect the increase of precipitation in the eastern part of the Mongolian period from the early 1980s to the mid-1990s, but it has decreased since the mid-1990s. There are reduced mutations around 2000 and the cycle changes of 5-7 years.
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备注/Memo
收稿日期:2018-10-26 基金项目:国家自然科学基金资助项目(41775079)