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Arid Land Geography ›› 2022, Vol. 45 ›› Issue (2): 370-378.doi: 10.12118/j.issn.1000–6060.2021.228

• Climatology and Hydrology • Previous Articles     Next Articles

Migration characteristics of wind erosion climate erosivity and its influencing factors in Xinjiang in recent 50 years

WANG Yaqin1,2(),YANG Haimei1,2,FAN Wenbo1,2(),XU Zhongyu3,QIAO Changlu1,2   

  1. 1. College of Water & Architecture Engineering, Shihezi University, Shihezi 832000, Xinjiang, China
    2. Key Laboratory of Modern Water-saving Irrigation of Xinjiang Production & Construction Group, Shihezi University, Shihezi 832000, Xinjiang, China
    3. College of Science, Shihezi University, Shihezi 832000, Xinjiang, China
  • Received:2021-05-17 Revised:2021-07-08 Online:2022-03-25 Published:2022-04-02
  • Contact: Wenbo FAN E-mail:1565266581@qq.com;fwb205@163.com

Abstract:

Based on daily meteorological data of 62 meteorological stations in Xinjiang, China from 1969 to 2019, this study investigated the influence of meteorological factors on wind erosion climatic erosivity. Geographically weighted regression and gravity center migration models were used to analyze the gravity center migration law of wind erosion climatic erosivity in Xinjiang from the spatial and temporal scales. Combined with the effective sensitivity index and effective affected area, the sensitivity degree of wind erosion climatic erosivity to various meteorological factors was quantitatively described. The dominant factors of wind erosion climatic erosivity in different regions of Xinjiang were analyzed. The results showed that the center of gravity of wind erosion for the past 50 years is mainly located at the junction of the north-south and east boundaries. The migration directions of inter-annual and inter-month show a northwest-southeast-northwest cycle. The center of gravity of wind erosion moves from the northwest to the southeast at the onset of the spring and summer and then moves back to the northwest when the cold season approaches. The degree of influence of climatic factors on wind erosion climatic erosivity is shown as wind speed>air temperature>precipitation>relative humidity. In the past 30 years, the effective influence of wind speed, mean air temperature, humidity, and precipitation on wind erosion has decreased by 124598.15 km2, 51891.28 km2, 11287.12 km2, and 18627.12 km2, respectively. Regionally, the wind erosion climatic erosivity is mainly influenced by relative humidity and precipitation in the Altai Prefecture of north Xinjiang. Wind speed and temperature are the main factors influencing wind erosion climatic erosivity in the southwest of southern Xinjiang. Wind erosion climatic erosivity in eastern Xinjiang is affected only by wind speed. The research results can provide regionally differentiated theoretical guidance for preventing and assessing soil wind erosion disasters in Xinjiang. It can also provide new research perspectives for studying large-scale driving forces of soil wind erosion.

Key words: wind erosion climate erosivity, climate change, center of gravity migration, geographically weighted regression, Xinjiang