基于格点数据的1961-2012年祁连山山区面雨量特征分析（英文）

编号 zgly0001584308

文献类型 期刊论文

文献题名 基于格点数据的1961-2012年祁连山山区面雨量特征分析（英文）

作者 强芳  张明军  王圣杰  刘杨民  任正果  朱小凡 

作者单位 CollegeofGeographyandEnvironmentalScience  NorthwestNormalUniversity 

母体文献 Journal of Geographical Sciences 

年卷期 2016年01期

年份 2016 

分类号 P426.6 

关键词 griddeddataset  arealprecipitation  principalcomponentanalysis  QilianMountains 

文摘内容 Based on a 0.5°×0.5° daily gridded precipitation dataset and observations in meteorological stations released by the National Meteorological Information Center,the interannual variation of areal precipitation in the Qilian Mountains during 1961–2012 is investigated using principal component analysis(PCA) and regression analysis,and the relationship between areal precipitation and drought accumulation intensity is also analyzed.The results indicate that the spatial distribution of precipitation in the Qilian Mountains can be well reflected by the gridded dataset.The gridded data-based precipitation in mountainous region is generally larger than that in plain region,and the eastern section of the mountain range usually has more precipitation than the western section.The annual mean areal precipitation in the Qilian Mountains is 724.9×108 m3,and the seasonal means in spring,summer,autumn and winter are 118.9×108 m3,469.4×108 m3,122.5×108 m3 and 14.1×108 m3,respectively.Summer is a season with the largest areal precipitation among the four seasons,and the proportion in summer is approximately 64.76%.The areal precipitation in summer,autumn and winter shows increasing trends,but a decreasing trend is seen in spring.Among the four seasons,summer have the largest trend magnitude of 1.7×108 m3?a–1.The correlation between areal precipitation in the mountainous region and dry-wet conditions in the mountains and the surroundings can be well exhibited.There is a negative correlation between drought accumulation intensity and the larger areal precipitation is consistent with the weaker drought intensity for this region.