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中国沙漠 ›› 2006, Vol. 26 ›› Issue (3): 384-388.

• 研究论文 • 上一篇    下一篇

我国沙尘暴发生日数的空间分布格局

常生华1, 李 广2*, 侯扶江1   

  1. 1.兰州大学 草地农业科技学院,农业部草地农业生态系统学重点开放实验室, 甘肃省草原生态研究所, 甘肃 兰州 730020; 2.甘肃农业大学, 甘肃 兰州 730070
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2006-05-20 发布日期:2006-05-20

Spatial Distribution of Sand-dust Storm Weather in China

CHANG Sheng-hua1, LI Guang2, HOU Fu-jiang1   

  1. 1.School of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China; Key Open Laboratory of Pastoral Agriculture Ecosystem, Agriculture Administration, Lanzhou 730020, China; Gansu Grassland Ecological Research Institute,Lanzhou 730020, China; 2.Gansu Agriculture University,Lanzhou 730070, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2006-05-20 Published:2006-05-20

摘要: 根据全国近30 a的沙尘暴记录,运用分形分析得出,在不同的降水量区域,沙尘暴的发生规律明显不同。中国北方沙尘暴发生日数平均为4.4 d·a-1。年降水量≤305 mm的地区沙尘暴发生日数最多,平均为9.9 d·a-1,这是荒漠和半荒漠地区,主要是我国传统的畜牧区;305 mm<年降水量<570 mm的地区平均为4.0 d·a-1,这是草原区,主要是传统的农牧交错带。年降水量≥570 mm的地区为0.4 d·a-1,主要是我国的农耕区。305 mm<年降水量<570 mm的区域,沙尘暴发生的频率随降水的变化幅度最大,为4.1,年降水量≤305 mm地区,沙尘暴随降水的变化幅度最小,为0.3。分析认为,我国沙尘暴危害的防治需要构建牧区—农牧交错带—农区生态农业体系。

关键词: 沙尘暴发生日数, 分形分析, 空间格局, 牧区农牧交错带农区生态农业体系

Abstract: Based on records of sand-dust storm weather during lately 30 years and by using fractal analysis, we found out that the occurrence of sand-dust storm varied obviously along with rainfall regionalization in China. The annual average days of sand-dust storm are 4.4 days in northern China; 9.9 days in region with rainfall less or equal to 305 mm, where belongs to desert or semi-desert area and also the traditional pastoral area in China; 4.0 days in region with rainfall between 305 mm and 570 mm, where belongs to steppe area and the traditional pasture-agriculture transition zone; 0.4 days in region with rainfall more or equal to 570 mm, where mainly for crop farming zone in China. As for the amplitude of sandstorm frequency changing with rainfall, it is the largest in the area with rainfall between 305 mm and 570 mm, the value is 4.1; the smallest in the area with rainfall less or equal to 305 mm, value is 0.3. It was proposed that the establishment of an ecological agriculture system bestriding pasturing area- interlaced zone- farming area is needed for controlling and preventing the sandstorm disasters of China.

Key words: sand-dust storm occurring days, fractal analysis, spatial distribution, ecological agriculture system bestriding pasturing area-interlaced zone-farming area

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