陕西省日照时数季节变化特征分析  

Variation Characteristics of Seasonal Sunshine Duration in Shaanxi Province

作　　者：高蓓[1,2] 卫海燕[1] 郭彦龙[1] 董金芳[2] 

机构地区：[1]陕西师范大学旅游与环境学院,陕西西安710062 [2]陕西省农业遥感信息中心,陕西西安710015

出　　处：《水土保持通报》2013年第1期178-181,187,共5页Bulletin of Soil and Water Conservation

基　　金：国家科技部公益性行业(气象)科研专项"太阳能预报技术研究"(GYHY201006036);国家科技支撑计划项目"极端天气气候事件数值模拟"(2007BAC29B03)

摘　　要：利用1961—2010年陕西省95个气象站点的观测数据,采用Mann—Kendal非参数检验方法和EOF经验正交分解法,对陕西省近50a来四季日照时数的变化特征进行了趋势性分析。结果表明,50a来,陕西省日照时数的下降出现在夏季和冬季,其中夏季减少趋势通过了p=0.01的显著性检验。春季和秋季变化表现为上升趋势,但上升趋势不明显;四季日照时数的主要下降中心在延安地区中部和宝鸡地区西部,不同季节气候变异中心的位置会发生变化。Based on the data observed at 95 meteorological stations of Shaanxi Province from 1961 to 2010, Mann- Kendall trend test and EOF analysis were used to study the tendency of the variation characteristics of seasonal sunshine duration. Results showed that the seasonal sunshine duration decreased in summer and winter in the last 50 years, of which the decreased trend in summer passes significance test at p 0.01 confi- dence level. The seasonal sunshine duration showed increased trends in spring and autumn, but the trends were not significant in spring and autumn. The anomalous centers of the seasonal sunshine duration were mainly in the central Yan＇an City and the west of Baoji City, and they were different in different seasons.

关 键 词：日照时数 季节变化 Mann-Kendal EOF法 

分 类 号：P422.11[天文地球—大气科学及气象学]