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Journal of Desert Research ›› 2022, Vol. 42 ›› Issue (5): 54-62.DOI: 10.7522/j.issn.1000-694X.2022.00014

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Drift potential characteristics of Mu Us Sandy Land calculated with different data sources

Lixia Gu(), Ping Lv(), Fang Ma, Guoxiang Chen, Zhun Liang, Mingjing Xu, Ying Yang   

  1. School of Geography and Tourism,Shaanxi Normal University,Xi'an 710119,China
  • Received:2021-12-12 Revised:2022-02-27 Online:2022-09-20 Published:2022-09-22
  • Contact: Ping Lv

Abstract:

Wind is the dynamic basis for the development of wind erosion and aeolian geomorphology in arid and semi-arid areas. We usually use wind speed data to discuss the regional wind regime, but there are differences in the results when different wind speed data are selected to study the same regional wind regime. Taking the Mu Us Sandy Land as an example, the daily maximum wind speed and wind direction data from the China Meteorological Data Service Center (CMDC) and the daily observation wind speed and wind direction data from the US National Climatic Data Center (NCDC) were selected to analyze the sand-driving wind. The results show that: (1) The difference of average sand-driving wind speed is small, but the frequency of sand-driving wind is obviously higher in CMDC data source. (2) The annual sand-driving wind direction in the sandy land is mainly WNW, W and NW, but the composition of annual sand-driving wind direction, summer and autumn sand-driving wind direction in different regions is more complex in CMDC data source, and the frequency of primary and secondary sand-driving wind direction is higher in CMDC data source. (3) The sandy land as a whole belongs to low wind energy environment, medium wind direction variability, sharp double peak or wide single peak wind conditions, but the annual sand drift potential calculated by maximum wind speed is about 3.3 times that calculated by timing observation wind speed. Based on the above two sets of data sources, quantitative comparative analysis of wind regime and sand drift potential in Mu Us Sandy Land is made, which is a new attempt to study regional wind regime, in order to improve our understanding of wind speed differences provided by different data sources, and provide certain reference for the analysis of sand-driving wind in different regions in the future.

Key words: CMDC, NCDC, wind regime, drift potential, Mu Us Sandy Land

CLC Number: