北京师范大学学报（自然科学版）2017，Vol.53Issue(1)：43-50,8.DOI:10.16360/j.cnki.jbnuns.2017.01.009
1965-2013年黄土高原地区极端降水事件时空变化特征
Spatiotemporal variations of extreme precipitation events in the Loess Plateau from 1965 to 2013
摘要
Abstract
Daily precipitation data at 52 meteorological stations were used to analyze spatiotemporal variation in 11 extreme precipitation indicaters in the Loess Plateau from 1965-2013 by linear regression,MannKendall,correlation analysis and inverse distance weighting (IDW).For temporal variation,apart from simple daily intensity index (SD Ⅱ),other sustainability indices and intensity indices were found to exhibit nonsignificant decreasing trend from 1965-2013,absolute indices and relative indices exhibited non-significant increasing trend except heavy precipitation days (R10mm).For spatial variation,consecutive dry days (CDD) increased the most in region Ⅲ,and consecutive wet days (CWD) and wet day precipitation (PRCPTOT) increased the largest in the northern region Ⅱ.Maximum 1-day and 5-day precipitations (RX1day,RX5day) increased the largest in the central and northern region Ⅱ,and the SD Ⅱ increased the largest in northern region Ⅰ and Ⅱ.The change trend of R10mm,very heavy precipitation days (R20mm) and R25mm increased from south to north in the Loess Plateau.Very wet day precipitation (R95p) and extremely wet day precipitation (R99p) increased the largest in northern region Ⅱ.The CDD had negative correlation with longitude and latitude,PRCPTOT,R10mm and R25mm had positive correlation with longitude.Other extreme precipitation had non-significant correlation with longitude,latitude and altitude.Principal component analysis indicated that two types extreme precipitation explained variances was 80.73％.Apart from CDD,other extreme precipitation had significant correlation with PRCPTOT at the level of 0.01.Hurst index indicated that CDD,SD Ⅱ,R10mm,R20mm were reverse characteristics,while PRCPTOT,RX1day,RXSday,R95p and R99p were similar characteristic.关键词
极端降水/时空变化/黄土高原地区Key words
extreme precipitation/spatiotemporal variations/Loess Plateau region分类
天文与地球科学引用本文复制引用
赵安周,朱秀芳,潘耀忠..1965-2013年黄土高原地区极端降水事件时空变化特征[J].北京师范大学学报（自然科学版）,2017,53(1):43-50,8.基金项目
国家“高分辨率对地观测系统”重大专项基金资助项目 （）
国家青年自然科学基金资助项目(41401479) （41401479）
高等学校博士学科点专项科研基金资助项目(20130003120041) （20130003120041）
