主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

气象与环境学报 ›› 2013, Vol. 29 ›› Issue (5): 112-120.doi:

• 论 文 • 上一篇    下一篇

1961—2009年东北地区日照时数变化特征

周晓宇1 张新宜2  崔妍1 王颖1 张晓月3 赵春雨3   

  1. 1.沈阳区域气候中心,辽宁 沈阳 110166;2.湖北省黄石市气象局,湖北 黄石 435002;3.辽宁省气象科学研究所,辽宁 沈阳110166
  • 出版日期:2013-10-31 发布日期:2013-10-31

The characteristics of sunshine duration from 1961 to 2009 in northeast China

ZHOU Xiao-yu ZHANG Xin-yi2  CUI Yan WANG Ying1  ZHANG Xiao-yue3  ZHAO Chun-yu3   

  1. 1.Shenyang Regional Climate Center, Shenyang 110166, China; 2. Huangshi Meteorological Service,Huangshi 435002, China; 3. Liaonig Institute of Meteorological Science, Shenyang 110166, China
  • Online:2013-10-31 Published:2013-10-31

摘要: 根据1961—2009年东北地区104个气象站的日照时数、气温、降水、风速和相对湿度资料,利用趋势分析、Mann-Kendall分析和相关分析等方法,研究东北地区日照时数月、季、年的时空变化特征,同时还对可能影响日照时数的气候因子进行分析。结果表明:东北地区5月日照时数最高,12月日照时数最低。年日照时数呈显著减少趋势,平均每10 a减少40.5 h;除秋季日照时数变化不显著外,其他季节日照时数均显著减少。在20世纪80年代初期存在明显的突变,日照时数开始减少。东北地区日照时数大致呈西高东低的经向分布;除黑龙江北部地区外,其余大部地区日照时数均呈减少的趋势,其中吉林北部地区减少最为明显。东北地区日照时数与气温呈负相关关系,相关系数为-0.40;与降水呈负相关关系,相关系数为-0.37;与风速呈正相关关系,相关系数为0.53;与相对湿度呈负相关关系,相关系数为-0.32。前三者均通过了99.9 %的信度检验,相对湿度通过了99.5 %的信度检验。

关键词: 日照时数, 趋势系数, 气候要素

Abstract: Based on the sunshine duration, temperature, precipitation, wind speed and relative humidity data at 104 weather stations from 1961 to 2009 in the northeast China, the monthly, seasonal and annual trends of the sunshine duration and its spatial distribution were analyzed using  methods of a trend analysis, a Mann-Kendall test and a correlation analysis. The impacting factors of sunshine duration were also discussed. The results show that the highest and lowest sunshine duration occurs in May and December, respectively. The annual sunshine duration has a significant decreasing tendency  with 40.5 hours per  decade. The seasonal sunshine duration significantly decreases except for in autumn. The sunshine duration has an abrupt change in the early 1980s and then decreases. The sunshine duration in the northeast China is high in the west and low in the east. Except that in the northern Heilongjiang province, the sunshine duration in the other regions is in a decreasing tendency, especially in the northern Jilin province. The annual sunshine duration is in a negative correlation with annual mean temperature, precipiation and relative humidity, and the corresponding correlation coefficients are -0.40, -0.37 and -0.32 respecitvely, while it is in a positive correlation with wind speed and the correlation coefficient is 0.53. The relative humidity coefficient passes 99.5 % confidence levels, and the other passes 99.9 % confidence levels.

Key words:  Sunshine duration, Tendency coefficient, Climate elements