梁剑鸣, 周杰, 何忠, 刘卫国, 梁银丽, 程积民. 黄土高原现代自然降尘的特征——以固原安塞为例[J]. 海洋地质与第四纪地质, 2009, 29(1): 103-108. DOI: 10.3724/SP.J.1140.2009.01103
引用本文: 梁剑鸣, 周杰, 何忠, 刘卫国, 梁银丽, 程积民. 黄土高原现代自然降尘的特征——以固原安塞为例[J]. 海洋地质与第四纪地质, 2009, 29(1): 103-108. DOI: 10.3724/SP.J.1140.2009.01103
LIANG Jianming, ZHOU Jie, HE Zhong, LIU Weiguo, LIANG Yinli, CHENG Jimin. CHARACTERIZATION OF MODERN DUSTFALL IN THE LOESS PLATEAU: A CASE STUDY OF GUYUAN AND ANSAI[J]. Marine Geology & Quaternary Geology, 2009, 29(1): 103-108. DOI: 10.3724/SP.J.1140.2009.01103
Citation: LIANG Jianming, ZHOU Jie, HE Zhong, LIU Weiguo, LIANG Yinli, CHENG Jimin. CHARACTERIZATION OF MODERN DUSTFALL IN THE LOESS PLATEAU: A CASE STUDY OF GUYUAN AND ANSAI[J]. Marine Geology & Quaternary Geology, 2009, 29(1): 103-108. DOI: 10.3724/SP.J.1140.2009.01103

黄土高原现代自然降尘的特征——以固原安塞为例

CHARACTERIZATION OF MODERN DUSTFALL IN THE LOESS PLATEAU: A CASE STUDY OF GUYUAN AND ANSAI

  • 摘要: 收集了宁夏固原2007年5月至2008年4月的12个降尘样品,陕西安塞2007年5-8月、2008年3-11月的13个降尘样品,并分别在两个降尘采样点附近采集了2个自然表土样品,对样品进行了总有机碳、粒度、磁化率分析,结果发现两地降尘的总有机质含量在1.029%~6.634%之间。粒度特征显示近源搬运占主导地位,同时,工业污染产生的PM10以下颗粒物贡献较小。降尘磁化率比自然表土明显偏高,但季节变化不明显。

     

    Abstract: To investigate the characteristics of modern dustfall in the Loess Plateau, 12 dustfall samples were collected in May 2007 through April 2008 at Guyan in Ningxia Hui Autonomous Region, and 13 dustfall samples were collected from May through August 2007 and from March through November 2008 at Ansai in Shaanxi Province. In addition to the dustfall samples, 2 samples of undisturbed top soil were also collected around each sampling site. Analysis of total organic carbon, grain size and magnetic susceptibility suggests,the total organic matter content of the dust samples from both sites range from 1.029% to 6.634%, and grain-size distribution indicates that near-source transport of dust is dominant and anthropogenic PM10 accounts for only a small fraction of dustfall. Magnetic susceptibility for the dustfall samples appears to be markedly higher than that for the topsoil samples,but no seasonal characteristics could be found.

     

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