地表； 沙尘输送； 水平通量； 塔克拉玛干沙漠," /> 地表； 沙尘输送； 水平通量； 塔克拉玛干沙漠,"/> 沙漠地区不同下垫面近地表沙尘水平通量研究
干旱区研究

干旱区研究 ›› 2014, Vol. 31 ›› Issue (3): 564-569.

• 陆面过程 • 上一篇    下一篇

沙漠地区不同下垫面近地表沙尘水平通量研究

杨兴华，何清，霍文，艾力•买买提依明，刘新春   

  1. 1. 中国气象局乌鲁木齐沙漠气象研究所，新疆 乌鲁木齐 830002；
    2. 塔克拉玛干沙漠大气环境观测试验站，新疆 塔中 841000
  • 收稿日期:2013-01-18 修回日期:2013-05-14 出版日期:2014-05-15 发布日期:2014-05-30
  • 作者简介:杨兴华 (1982-)，男，副研究员，主要从事沙漠气象及风沙灾害研究.E-mail： yxh19820218@163.com
  • 基金资助:

    中央级公益性科研院所基本科研业务费专项资金项目(IDM201103)；中国沙漠气象科学研究基金（Sqj2010014）

Near-surface Horizontal Sanddust Flux over  Different Underlying Surfaces in a Desert

YANG Xing-hua, HE Qing,HUO Wen, ALI Mamtimin, LIU Xin-chun   

  1. 1. Institute of Desert Meteorology, China Meteorological Administration, Urumqi 830002, China;
    2. Taklimakan Desert Station for Atmosphere and Environment Observation and Experiment, Tazhong 841000, Xinjiang, China
  • Received:2013-01-18 Revised:2013-05-14 Online:2014-05-15 Published:2014-05-30

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被引次数

11

摘要： 沙漠地区近地表水平输送的沙尘物质通量及其随高度的变化特征直接影响着沙尘的输送过程。选择塔克拉玛干沙漠腹地塔中地区的典型沙丘、平沙地为观测点，利用BSNE集沙仪，对2008—2009年11次典型沙尘天气过程中近地表0～200 cm不同高度层沙尘物质的水平输送进行了测量，对其随高度变化特征进行分析，计算近地表水平运动的总沙尘通量。结果表明：近地表0～200 cm范围内，在沙丘顶部和平沙地沙尘水平通量均随高度呈显著降低趋势，在这2种下垫面条件下，沙尘水平通量随高度的变化均较好地符合幂函数关系；在沙丘顶部，通过100 cm（宽度）×200 cm（高度）空间断面的总沙尘水平通量为3 721.0 kg，平沙地通过相同大小断面的沙尘水平通量为2 252.9 kg，比沙丘顶部减少了39.5%；沙丘顶部与平沙地PM80的总水平通量分别为996.8 kg和678.9 kg。

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Abstract: Aeolian sanddust transport is a serious problem in many arid regions in the world, and it is considered to be the significant part of global biogeochemical cycles. Deserts are the main sources of aeolian sanddust transport in the nearsurface air layer, and aeolian sanddust transport process is closely related to the variation of horizontal sanddust flux near ground surface with the height. In this study, the samples were collected with BSNE samplers, the data of horizontal sanddust flux over sand dune top and level sandland in hinterland of the Taklimakan Desert were analyzed, and the variation of horizontal sanddust flux within 200 cm above the ground surface with the height was researched. The results indicated that, in the nearsurface air layer in a range of 0-200 cm, the intensity of horizontal flux of aeolian sanddust decreased significantly with the increase of the height over sand dune top and level sandland. Over the two different underlying surfaces, the change of horizontal sanddust flux with the height obeyed the power function well. The total flux of aeolian sanddust passing through a section of 100 cm×200 cm was 3 721.0 kg over sand dune top, but 2 252.9 kg over level sandland and reduced by 39.5% compared with that over sand dune top. The horizontal fluxes of aeolian sanddust of PM80 over sand dune top and level sandland were 996.8 kg and 678.9 kg respectively.  

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