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沈阳市降水量正态分布检验及其时空变化特征

吉曹翔1李崇1陈鹏心1班伟龙1
白冰2宋晓巍1金宇3梁红1     

  1. 1.辽宁省沈阳市气象局,辽宁沈阳110168;2.甘肃省气象信息与技术装备保障中心,
    甘肃兰州730020;3.辽宁省沈阳市沈北新区气象局,辽宁沈阳110135
  • 出版日期:2018-12-31 发布日期:2018-12-31
  • 作者简介:吉曹翔(1985— ),男,江苏海安人,工程师,主要从事气象信息网络维护工作. E-mail:316526613@qq.com。

Normal Distribution Test and Space-time Characteristics of
 Precipitation in Shenyang of Liaoning Province

JI Caoxiang1, LI Chong1, CHEN Pengxin1, BAN Weilong1,
BAI Bing2, SONG Xiaowei1, JIN Yu3, LIANG Hong1   

  1. 1. Shenyang Meteorological Bureau of Liaoning Province, Shenyang 110168, China;
    2. Gansu Meteorological Information and Technic Support and Equipment Center, Lanzhou 730020, China;
    3. Shenbei Xinqu Meteorological Station of Liaoning Province, Shenyang 110135, China
  • Online:2018-12-31 Published:2018-12-31

摘要:

利用辽宁沈阳市1960—2017年5个国家级气象站逐月降水量资料,分析沈阳市不同时间尺度降水的时空分布特征,并采用偏度-峰度系数和S-W检验法,对沈阳市降水量的正态性分布进行检验。结果表明,除新民外,沈阳市其他地区年降水量均满足正态分布;春季降水量的正态性最好,冬季降水量基本不满足正态分布;月降水量的正态性较差,经过正态变换后的正态性均得到明显改善。沈阳市年平均降水量呈自东南向西北逐渐递减的空间分布特征,且近58 a来年降水量整体呈微弱减少趋势。

关键词: 沈阳, 降水量, 正态性分布, 正态变换

Abstract:

Based on the monthly precipitation at five national meteorological stations in Shenyang of Liaoning Province from 1960 to 2017, the temporal and spatial distribution characteristics of precipitation with different time scales in Shenyang were analyzed. And the normal distribution of precipitation in Shenyang was tested by using skewness-kurtosis coefficient and S-W test method. The results show that the annual precipitation fitted normal distribution in most areas of Shenyang except for Xinmin station. The normality of spring precipitation was the best, while that of winter precipitation was worst, and the test score basically didn’t reach the normal score at each station in Shenyang. The normality of monthly precipitation in Shenyang was poor, but the normality improved obviously after the normality transformation, which would provide a scientific basis for analysis and prediction of precipitation. The annual precipitation decreased gradually from southeast to northwest in Shenyang, and it appeared a weak decreasing trend from 1960 to 2017.

Key words:  Shenyang, precipitation, normal distribution, normal transformation