[1]WANG Junde,SU Zhenjuan,ZHANG Lina,et al.Characteristics of Temporal and Spatial Variation of Extreme Precipitation Index in Gansu Province[J].Research of Soil and Water Conservation,2022,29(04):270-276+291.
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Characteristics of Temporal and Spatial Variation of Extreme Precipitation Index in Gansu Province
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
29
Number of periods:
2022 04
Page number:
270-276+291
Column:
Public date:
2022-06-20
- Title:
- Characteristics of Temporal and Spatial Variation of Extreme Precipitation Index in Gansu Province
- CLC:
- P426.6
- DOI:
- -
- Abstract:
- In order to clarify the temporal and spatial regularity and variation characteristics of extreme precipitation events in Gansu Province, based on the daily precipitation data of 23 meteorological stations in Gansu Province, 11 extreme precipitation indexes recommended by the Expert Group on Climate Change Monitoring and Indexes(ETCCDI)were selected, and the temporal change characteristics of extreme precipitation indexes were analyzed. Statistical methods were used to study the spatial distribution characteristics of extreme precipitation indices. The results show that: in terms of time distribution, the continuous dry period in Gansu Province had being significantly weakened, the continuous wet period had decreased slightly, and the remaining 10 extreme precipitation indexes showed an increasing trend, especially the total annual precipitation had increased significantly; on the whole, the extreme index changes had obvious periodicity, which could be roughly divided into 2 to 3 periods; sudden changes mostly which occurred in the middle and late 1960s; in terms of spatial distribution, the extreme precipitation index of Gansu Province had obvious spatial variation characteristics; the 10 extreme indexes, including annual precipitation, increased eastward from the Hexi Corridor, and the opposite was true for the continuous dry period. In conclusion, there are obvious temporal and spatial differences in the changes of extreme precipitation index in Gansu Province.
- References:
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Last Update:
2022-06-20