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中国沙漠 ›› 2016, Vol. 36 ›› Issue (6): 1653-1658.DOI: 10.7522/j.issn.1000-694X.2015.00090

• 天气与气候 • 上一篇    下一篇

沙漠-绿洲过渡带风沙活动特征——以敦煌黑山嘴地区为例

安志山, 张克存, 谭立海   

  1. 中国科学院寒区旱区环境与工程研究所 沙漠与沙漠化重点实验室/敦煌戈壁荒漠生态与环境研究站/甘肃省风沙灾害防治工程技术研究中心, 甘肃 兰州 730000
  • 收稿日期:2015-01-27 修回日期:2015-03-27 出版日期:2016-11-20 发布日期:2016-11-20
  • 作者简介:安志山(1986-),男,河南安阳人,工程师,主要从事风沙地貌与风沙工程研究。E-mail:an1986wen@163.com
  • 基金资助:
    国家自然科学基金项目(41371027);中国科学院寒区旱区环境与工程研究所青-人才成长基金项目

Characteristics of the Sand Transportation Intensity in the Desert-oasis Ecotone: A case study in Heishanzui Area of Dunhuang

An Zhishan, Zhang Kecun, Tan Lihai   

  1. Key Laboratory of Desert and Desertification;Dunhuang Gobi and Desert Ecology and Environment Research Station;Gansu Center for Sand Hazard Reduction Engineering and Technology, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2015-01-27 Revised:2015-03-27 Online:2016-11-20 Published:2016-11-20

摘要: 统计2013-2014年度敦煌黑山嘴地区沙漠-绿洲过渡带气象资料,对区域风沙活动特征进行系统研究。结果表明:区域内合成起沙风以偏南风为主,即由沙漠指向绿洲。从沙漠腹地到绿洲内部,由于植被和房屋增多,起沙风频次和合成输沙势减小,风沙活动减弱,且春季风沙活动最强烈。夏秋季节植被可有效降低风速,减少起沙风频次,改善局地气候。平均气温与平均空气湿度负相关。月平均气温与月平均风速呈现同步性,越靠近沙漠腹地,两者同步性越强;日间气温与风速变化存在同步性,但夜间沙漠与绿洲气温差对风速存在影响,温差越大,风速波幅越大。

关键词: 敦煌, 起沙风, 输沙势, 风沙活动

Abstract: According to meteorological data of the Heishanzui area of Dunhuang, the authors conducted systematic study about the regional sand activity characteristics. The results show that the main direction of the resultant sand-driving wind is south, just from desert hinterland to oasis. From desert to oasis, the vegetation and buildings cover increase, thus the frequency of sand-driving wind and drift potential reduce. So the sand activities have gradually been weakened, and spring has the strongest sand activities. In summer and autumn, the vegetation of oasis not only effectively reduce the wind speed, but also reduce the frequency of sand-driving wind and thus improve the microclimate. The relation between the daily variation of temperature and humidity is obviously negative. However, with the increase of monthly average wind velocity, the monthly average temperature rises. And the more closer to the desert hinterland, the higher of their correlation. But this phenomenon of between day and night just exist in the summer and autumn.

Key words: Dunhuang, sand-driving wind, drift potential, sand transportation intensity

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