| The characteristics of climate change in Xilingol League from 1956 to 2017 |
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| DOI：10.7606/j.issn.1000-7601.2019.04.38 |
| Key Words: climate change Xilingol League air temperature precipitation evaporation |
| Author Name | Affiliation | | CAO Yan-ping | The College of Environment and Planning of Henan University, Kaifeng, Henan 475004, China
Laboratory of Geospatial Technology for the Middle and Lower Yellow River Region, Kaifeng, Henan 475004, China | | PANG Ying-jun | Institute of Desertification Studies, Chinese Academy of Forestry, Beijing 100091, China | | PANG Xiao-jie | College of Agronomy and Biotechnology,China Agricultural University,Beijing 100193, China |
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| Abstract: |
| Using the meteorological datas from eight national meteorological stations in Xilingol League from 1956 to 2017, the characteristics of climate change in the region were analyzed by linear regression and other statistical methods. The results show that: The mean value of average annual air temperature in Xilingol League was 2.76℃, which had a significant upward trend with an increase rate of 0.43°C · (10a)-1, which was 34.38% higher than the national air temperature increase rate. The average annual precipitation in Xilingol League was 253.86 mm, which had a slight decreasing trend of annual precipitation. However，the decreasing trend did not pass the significant level test of 0.05. The deceleration rate was about 6.32 mm·(10a)-1, which was contrary to the global and national overall change trend. The average value of annual pan evaporation in Xilingol League was 2 164.75 mm, showing a slight increasing trend, which passed the significant level test of 0.01. The ascending rate was 10.90 mm·(10a)-1, which was contrary to the global and national overall change trend. The mean value of average annual wind speed in Xilingol League was 3.76 m·s-1, showing a declining trend, which passed the significance level test of 0.01.The deceleration rate was 0.16 m·s-1·(10a)-1, which was slightly lower than the national deceleration rate. The average annual air temperature, annual precipitation, and average annual wind speed of the Xilingol League had periodic patterns of different scales, and the annual pan evaporation’s periodicity was weak. |
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