[1]SHE Yuanyang,YANG Bo,SHANG Qingfang,et al.Characteristics of Continuity of Precipitation Events in Recent 58 Years in Hexi Area[J].Research of Soil and Water Conservation,2020,27(03):139-145.
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Characteristics of Continuity of Precipitation Events in Recent 58 Years in Hexi Area
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 03
Page number:
139-145
Column:
目次
Public date:
2020-04-20
- Title:
- Characteristics of Continuity of Precipitation Events in Recent 58 Years in Hexi Area
- Keywords:
- extreme precipitation; maximum consecutive wet days; Hexi Area; spatial and temporal variations
- CLC:
- P426.6
- DOI:
- -
- Abstract:
- Based on the daily precipitation data which quality was control from 13 rain stations in Hexi Area during 1958—2015, nine precipitation extreme indices relative to days of consecutive wet events, precipitation and precipitation intensity were defined, the spatial and temporal possibility variations of maximum consecutive wet days in the whole year, summer and fall seasons were studied, the maximum consecutive wet events' spatial and temporal variability of the study area was examined by using the Mann-Kendall method for trend analysis and at the 95% confidence level for trend significance test. The results show that:(1)one or two days consecutive wet days occurred most frequently in Hexi Area; the days of maximum consecutive wet days increased in summer and reduced in fall in recent years, but all increased in whole years;(2)the precipitation of consecutive wet days had reduced in summer and more significantly increased in fall, the differentiation of wet days between summer and autumn was obviously in midwest of Hexi area, the reduction of precipitation of consecutive wet days mainly occurred in the southeast;(3)the maximum precipitation intensities mostly occurred in the events of onsecutive precipitation with the duration of four to six day, and the precipitation intensities increased with the increase of the number of days of maximum consecutive wet days. In all, the number of days of maximum consecutive wet days increased while precipitation intensities increased too in Hexi Area in recent years, showing the wet tendency and more obvious wet tendency in fall. These results of this study are helpful to further understand the characteristics of extreme precipitation change and regional climate change response in the northwest arid region.
- References:
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Last Update:
2020-04-30