[1]CHAI Suying,CAO Yan,DOU Xiaodong,et al.Analysis Temporal and Spatial Changes of Extreme Climatic Events in Nanpan River Basin from 1964 to 2017[J].Research of Soil and Water Conservation,2020,27(01):151-160.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 01
Page number:
151-160
Column:
Public date:
2020-02-20
- Title:
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Analysis Temporal and Spatial Changes of Extreme Climatic Events in Nanpan River Basin from 1964 to 2017
- Author(s):
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CHAI Suying1, CAO Yan2, DOU Xiaodong3, ZHANG Xingzi1
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(1.Yunnan Institute of Environmental Science, Kunming 650034, China; 2.Yunnan Institute of Water Resources and Hydropower Research, Kunming 650228, China; 3.Yunnan Meteorological Service, Kunming 650034, China)
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- Keywords:
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extreme temperature; extreme precipitation; temporal and spatial characteristics; Mann-Kendall test; Nanpan River Basin
- CLC:
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P423.3; P426.6
- DOI:
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- Abstract:
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Based on the data of daily maximum, minimum and precipitation from 25 meteorological stations in the Nanpan River from 1964 to 2017, temporal and spatial variation characteristics of extreme climate events in Yunnan Province were analyzed by using the Mann-Kendall rank test and wave-let analysis methods. The results showed that:(1)in recent 54 years, SU25, TXx and WSDI characterizing extremely high temperatures presented the significant increasing trend, FD0 and CSDI characterizing extremely low temperatures presented the significant decreasing trend, TXx presented the significant increasing trend; R10, PRCPTOT, RX1, RX5, R95p and R99p showed marked or extremely significant decreasing trend, SDⅡ showed weak decreasing trend, CDD showed extremely significant decreasing trend, CWD showed weak increasing trend; the extreme climatic indices had all changed significantly after 2001, and the increasing trend of R95p and R99p was obvious;(2)the main space characteristics of the extreme temperature index characterizing extremely low temperatures were high in north and low in south, the main space characteristics of CSDI were high in east and low in west, WSDI showed the opposite distribution, the extreme precipitation index basically showed the distribution characteristic of the high level in the east and the low level in the west; the trend of dry-warming was the most obvious in the middle of Nanpan River Basin;(3)the warming range of the warming index was larger than that of the cold index, and the warming range of the extreme minimum temperature was larger than that of the extreme maximum temperature, the decrease of extreme precipitation level PRCPTOT was larger than that of R95p and R99p, the decrease of extreme precipitation intensity RX5 was larger than that of RX1, R10 and SDⅡ, the drying range of CDD was obviously larger than that of CWD;(4)the response of extreme precipitation to the changes of SU25 and TNn was more significant.