[1]XIAO Weiwei,AN Bin,JIA Dan.Temporal Variation Characteristics of Extreme Weather Events in Ankang from 1955 to 2017[J].Research of Soil and Water Conservation,2021,28(05):212-221.
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Temporal Variation Characteristics of Extreme Weather Events in Ankang from 1955 to 2017
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 05
Page number:
212-221
Column:
Public date:
2021-08-20
- Title:
- Temporal Variation Characteristics of Extreme Weather Events in Ankang from 1955 to 2017
- Keywords:
- temperature; precipitation; trend; test; Ankang City
- CLC:
- P467
- DOI:
- -
- Abstract:
- Ankang City is located in the hinterland of Qinba Mountains,which is a sensitive area of environmental change and an ecologically fragile area. It is of great significance to study extreme climate change for local disaster prevention and mitigation. Based on observed daily maximum temperature and minimum temperature and precipitation data during 1955 to 2017 in Ankang City,we calculated 11 extreme temperature indices and 8 extreme precipitation indices by using RClimDex software,and analyzed the temporal variation characteristics of extreme weather events in Ankang City by using linear fitting,Mann-Kendall method. The results showed that:(1)from 1955 to 2017,we found significantly increasing trends for the warm extreme indices and considerably decreasing trends for the cold extreme indices in Ankang City; the extreme minimum temperature,summer days,hot night days,warm days,warm night days,and growing season all significantly increased at a rate of 0.295℃/decade,1.754 d/decade,1.355 d/decade,0.32 d/decade,1.118 d/decade and 4.64 d/decade,respectively; frost days,cold days and cold nights decreased at a rate of -3.197 d/decade,-0.961 d/decade and -1.885 d/decade,respectively;(2)from 1955 to 2017,the extreme precipitation in Ankang showed an increasing trend; the maximum daily precipitation,moderate rain days,heavy precipitation,annual precipitation and continuous dry days increased at a rate of 0.885 mm/decade,0.079 d/decade 11.617 mm/decade,11.05 mm/decade and 1.495 d/decade,respectively,while the rate of heavy rain days increased significantly at a rate of 0.438 d/decade(p<0.05); the 5-days maximum daily precipitation and continuous wet days decreased significantly at the rate of -1.476 mm/decade and -0.001 d/decade,respectively;(3)the extreme temperature and precipitation indices in Ankang City had different abrupt changes,mainly in the 1960s and 1970s,1990s and the early 21st century. In general,the climate of Ankang City had been warming and drying in recent 63 years,especially after 1990s. Extreme climate change will increase drought and flood disasters,high temperature disasters,agricultural diseases and insect pests in this area. In the future,the government should deploy disaster reduction and prevention work in advance to minimize the disaster losses.
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Last Update:
2021-08-20