安徽农业科学2011，Vol.39Issue(27)：16885-16887,16889,4.
甘肃省平凉市近50年蒸发量的变化特征分析
Study on Change Trend of Evaporation in Recent 50 Years in Pingliang, Gansu Province
王丽军 1陈宝玉 2仙昀让1
作者信息
- 1. 兰州大学资源与环境学院,甘肃兰州730000
- 2. 兰州大学西部环境与气候变化研究院,甘肃兰州730000
- 折叠
摘要
Abstract
By dint of linear regression analysis method, 5-year running curve analysis method and Cv values comparison method, the evaporation in Pingliang City from 1952 to 2004 was studied. Results suggested that the general changes of evaporation in Pingliang in recent 50 years were decreasing. The average reduction rate was - 19.23 mm/( 10a), while the maximum decreasing rate during the summer days was -3.7 mm/( 10a); the 50 years' average evaporation in Pingliang city was 1 425. 1 mm/( 10a) , whereas the 1980s' average evaporation was lower than the total average value; the maximum biggest evaporation occurred in June, while the minimum value occurred in December; the seasonal variation trend was consistent with the general variation trend, except for the autumn' s evaporation change trend was not distinct; in the last 50 years, both the precipitation and the evaporation had been decreasing. However, the reception pace of precipitation was quicker than evaporation, which resulted in a drier climate. In the meantime, the reduction of precipitation promoted the occurrence of drought to certain degree.关键词
平凉/蒸发量/降雨量/气候变化Key words
Pingliang/ Evaporation/ Precipitation/ Climate change分类
天文与地球科学引用本文复制引用
王丽军,陈宝玉,仙昀让..甘肃省平凉市近50年蒸发量的变化特征分析[J].安徽农业科学,2011,39(27):16885-16887,16889,4.
