人民黄河
人民黃河
인민황하
Yellow River
2015年
1期
18-22
,共5页
赵翠平%陈岩%王卫光%郜志云
趙翠平%陳巖%王衛光%郜誌雲
조취평%진암%왕위광%고지운
时空变化%极端降水指数%黄河流域
時空變化%極耑降水指數%黃河流域
시공변화%겁단강수지수%황하류역
spatial and temporal variation%extreme precipitation indices%Yellow River basin
根据黄河流域80个气象站1957—2008年的逐日降水资料,利用RclimDex软件选用了10个极端降水指数,采用Mann-Kendall趋势检验法和线性回归分析法,研究了极端降水指数在年和季节尺度上的时空变化特征。结果表明:极端降水指数中除了Rx5DAY呈显著下降趋势、SDII呈上升趋势外,其他8个指数均呈非显著下降趋势;从极端气候指数的四季变化来看,Rx1DAY和Rx5DAY在夏、秋季的空间分布相似,且数值大于春、冬季的;黄河流域降水量呈逐年减小趋势,极端降水指数的变化趋势不明显,但存在时空差异。
根據黃河流域80箇氣象站1957—2008年的逐日降水資料,利用RclimDex軟件選用瞭10箇極耑降水指數,採用Mann-Kendall趨勢檢驗法和線性迴歸分析法,研究瞭極耑降水指數在年和季節呎度上的時空變化特徵。結果錶明:極耑降水指數中除瞭Rx5DAY呈顯著下降趨勢、SDII呈上升趨勢外,其他8箇指數均呈非顯著下降趨勢;從極耑氣候指數的四季變化來看,Rx1DAY和Rx5DAY在夏、鞦季的空間分佈相似,且數值大于春、鼕季的;黃河流域降水量呈逐年減小趨勢,極耑降水指數的變化趨勢不明顯,但存在時空差異。
근거황하류역80개기상참1957—2008년적축일강수자료,이용RclimDex연건선용료10개겁단강수지수,채용Mann-Kendall추세검험법화선성회귀분석법,연구료겁단강수지수재년화계절척도상적시공변화특정。결과표명:겁단강수지수중제료Rx5DAY정현저하강추세、SDII정상승추세외,기타8개지수균정비현저하강추세;종겁단기후지수적사계변화래간,Rx1DAY화Rx5DAY재하、추계적공간분포상사,차수치대우춘、동계적;황하류역강수량정축년감소추세,겁단강수지수적변화추세불명현,단존재시공차이。
Spatial and temporal patterns of changes in extreme precipitation were investigated by 10 extreme precipitation indices based on 80 meteorological stations′data of 1957—2008 period in the Yellow River basin,with the help of simple liner regression method,Mann-Ken-dall trend and RclimDex software. The results show that except Rx5DAY indicating significant negative trend and SDII revealing positive trend,the other eight indices display negative trend which are not significant. From the point of seasonal changes,Rx1DAY and Rx5DAY in summer and autumn have similar spatial features,the value of which is larger in spring and winter. It is learned that rainfall decreases year by year. All show that the trend of extreme precipitation indices are not significant and extreme precipitation events have difference in space and time in the Yellow River basin.