1961~2013年山东东明日照时数变化特征 及影响因素分析.pdf

Climate Change Research Letters 气候变化研究快报, 2015, 4(4), 171-178 Published Online October 2015 in Hans. /journal/ccrl /10.12677/ccrl.2015.44019 Analysis of Sunshine Time Variation Characteristics and Influence Factors of Dongming during 1961-2013 1 1 2 Guodong Xu , Cuifeng Sun , Yonghong Dong 1 Heze Meteorological Bureau, Heze Shandong 2 Dongming County Meteorological Bureau, Heze Shandong Email:139.com th st th Received: Jul. 15 , 2015; accepted: Aug. 1 , 2015; published: Aug. 6 , 2015 Copyright © 2015 by authors and Hans Publishers Inc. This work is licensed under the Creative Commons Attribution International License (CC BY). /licenses/by/4.0/ Abstract The paper statistically analyses the characteristics and influencing factors of Dongming sunshine times changes by using data of sunshine times, cloud cover, precipitation, relative humidity, fog and mist from 1961a to 2013a of Dongming ground meteorological observatory. The result showed: The sunshine times of 53 years reduced significantly and the decreasing trend was 109.2 hours on average every 10 years. In summer and winter, it reduced significantly and in fall ordi- narily. But in spring, the reducing trend was not so significant. Mutation of sunshine times in 1998 presented from high to low. It was obviously less and sharply reduced since the late 1990 year. The annual sunshine times showed a very significant negative correlation with the total cloud cover and the light fog days and a significant negative correlation with fog days. Sunshine times in all sea