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中国沙漠 ›› 2022, Vol. 42 ›› Issue (5): 54-62.DOI: 10.7522/j.issn.1000-694X.2022.00014

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不同数据源下毛乌素沙地风况及输沙势特征

顾立霞(), 吕萍(), 马芳, 陈国祥, 梁准, 许明静, 杨迎   

  1. 陕西师范大学 地理科学与旅游学院,陕西 西安 710119
  • 收稿日期:2021-12-12 修回日期:2022-02-27 出版日期:2022-09-20 发布日期:2022-09-22
  • 通讯作者: 吕萍
  • 作者简介:吕萍(E-mail: lvping@lzb.ac.cn
    顾立霞(1997—),女,河南信阳人,硕士研究生,研究方向为风沙地貌、区域开发与环境治理。E-mail: gulixia18337278057@163.com
  • 基金资助:
    国家自然科学基金项目(41871011);中央高校基本科研业务费专项资金项目(GK202107008)

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

摘要:

风是干旱、半干旱区风蚀风积地貌发育的动力基础,我们通常使用风速资料探讨区域风况,但选取不同的风速资料研究同一区域风况时结果存在差异。以毛乌素沙地为例,分别选取中国气象数据网(CMDC)的日最大风速及风向与美国国家气候数据中心(NCDC)的日8个定时观测风速及风向,对比分析起沙风特征。结果表明:(1)毛乌素沙地平均起沙风速相差较小,但起沙风频率明显在CMDC数据源中较高;(2)毛乌素沙地年起沙风向均以WNW、W和NW为主,但年起沙风次风向、不同区域夏季和秋季起沙风次风向组成均在CMDC数据源中较复杂,且起沙风主次风向频率均在CMDC数据源中较高;(3)毛乌素沙地整体均属于低风能环境,中等风向变率,锐双峰或宽单峰风况,但以最大风速计算的年输沙势约是以定时观测风速计算结果的3.3倍。基于两套数据源定量对比分析毛乌素沙地风况及输沙势,这对区域风况研究是一种新的尝试,以期提高对不同数据源提供的风速差异的认识,为今后不同区域的起沙风分析提供一定的参考。

关键词: CMDC, NCDC, 风况, 输沙势, 毛乌素沙地

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

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