Temporal and Spatial Distribution of Extreme Precipitation Events in Tibet during 1961-2010
The extreme precipitation event (EPE) in the Tibet Plateau is defined by relative index method and its spatial-temporal characteristics and period are analyzed by indicators including threshold,frequency,and intensity based on the daily rainfall data in 21 meteorological stations during 1961-2010.The results show that the threshold of EPE in Tibet Plateau ranges 15.7 ～36.0 mm,and Nielamu in the south,Rikaze in the valley of the Yarlung Zangbo River and Bomi and Chayu in southeast of Tibet Plateau have higher EPE threshold and intensity.Frequency of EPE is between 17 ～ 108 d,and its distribution has the reducing trend from east to west part of Tibet.During 1961-2010,a decreasing trend can be found in the west,north and southeast regions of Tibet,and such trend is more notable in west and southeast of Tibet.Frequency of EPE shows increasing trend in south,northeast of Tibet and the valley of the Yarlung Zangbo River.There are 3 years period of the frequency all over Tibet,and 8 years in west and south of Tibet.
NETL
NSTL
万方数据
维普
