[1]CAO Yan,WANG Jie,CHAI Suying,et al.Variation Characteristics of Diurnal Temperature Range and Its Influencing Factors in Yunnan Province from 1970 to 2014[J].Research of Soil and Water Conservation,2018,25(06):100-108.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
25
Number of periods:
2018 06
Page number:
100-108
Column:
Public date:
2018-10-26
- Title:
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Variation Characteristics of Diurnal Temperature Range and Its Influencing Factors in Yunnan Province from 1970 to 2014
- Author(s):
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CAO Yan1, WANG Jie1, CHAI Suying2, QI Na1
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1. Yunnan Institute of Water Resources and Hydropower Research, Kunming 650228, China;
2. Yunnan Institute of Environmental Science, Kunming 650034, China
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- Keywords:
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diurnal temperature range; meteorological factor; Yunnan Province
- CLC:
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P423
- DOI:
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- Abstract:
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Using daily maximum temperature, minimum temperature and mean temperature, precipitation, sunshine duration, relative humidity date from 30 meteorological stations in Yunnan Province from 1970 to 2014, the temporal and spatial variation characteristics of diurnal temperature range (DTR) in different areas of Yunnan Province were analyzed by using Mann-Kendall and wave-let analysis methods, and the influence factors of DTR were discussed. The results showed that annual mean DTR decreased and DTR decreased in spring, summer and winter from 1970 to 2014, the rate of DTR decrease was maximum in central Yunnan Province, the rates decreased by 0.153 0,0.374 3,0.146 2 and 0.294 7℃/decade, respectively, DTR increased in autumn, the rate of DTR increase was maximum in northwest Yunnan Province, the rate increased by 0.188 0℃/decade, and the strong oscillation period of DTR change was 28 years in different areas of Yunnan Province. The area with high value of DTR was mainly located in the valley area, and the area with low value of DTR mainly concentrated in the southeastern and western parts of Yunnan Province. Areas with great decreases of annual mean DTR and DTR in the spring, autumn and winter mainly concentrated in the central south and west of Yunnan Province, and the areas with great increases of annual mean DTR and DTR in the spring, autumn and winter mainly concentrated in the northwest of Yunnan Province, north part of central Yunnan. In the summer, the areas with great decrease of DTR mainly concentrated in the northwest of Yunnan Province, and the areas with great increase of DTR mainly concentrated in the central part of Yunnan Province. The main influence factors on DTR were the average temperature, precipitation and potential evapotranspiration.