长江科学院院报2017，Vol.34Issue(8)：18-23,29,7.DOI:10.11988/ckyyb.20160730
1970-2013年大西安地区降水时空变化特征分析
Spatial and Temporal Variations of Precipitation in Big Xi'an Region During 1970-2013
摘要
Abstract
The spatial distribution of precipitation is uneven in Big Xi'an region.According to the monthly precipitation data from 14 meteorological stations in Big Xi'an during 1970-2013,we analyzed the spatial and temporal variations of precipitation in five areas of Big Xi'an region by using moving average method,Mann-Kendall test method,wavelet analysis method and the Kriging interpolation method.Results show that the average annual precipitation in Big Xi'an region was 576.65 mm,decreasing overall with a rate of-10.04 mm/10 a.Decreases in precipitation in the east and north of Xi'an were more obvious than those in the west and south.Moreover,the distribution of precipitation in a year was uneven,mainly from July to September,accounting for 50.84％ of the total annual precipitation.In addition,precipitations in spring and autumn presented a downward trend,but precipitation in summer was in an upward trend.The first main period of annual precipitation change in the study area was 28 years.Precipitation in multiple years in the area experienced a fluctuation in "less-more-less-more" trend,with abrupt changes in 1980 and 1991;but interdecadal precipitation in the study area showed a trend from increase to decline and then to increase.In addition,the spatial distribution of annual precipitation is uneven,gradually decreasing from the southeast to the northwest.The research results could offer reference to the rational utilization of precipitation resources in Big Xi'an region.关键词
大西安地区/降水变化/空间分布/Mann-Kendall检验法/克里金插值法Key words
Big Xi'an region/precipitation variation/spatial distribution/Mann-Kendall test/Kriging interpolation method分类
天文与地球科学引用本文复制引用
从辉,周维博,宋扬,赖光东,白洁芳..1970-2013年大西安地区降水时空变化特征分析[J].长江科学院院报,2017,34(8):18-23,29,7.基金项目
中国地质调查局地质调查项目(12120113004800) （12120113004800）
