| 植被覆盖度与沙尘暴形成条件分析 |
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| 引用本文： | 陈志刚,周坚华.植被覆盖度与沙尘暴形成条件分析[J].生态环境,2010,19(4):870-876. |
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| 作者姓名： | 陈志刚 周坚华 |
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| 作者单位： | 华东师范大学地理信息科学教育部重点实验室,上海,200062 |
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| 摘 要： | 以归一化差值植被指数（Normalized Difference Vegetation Index,NDVI）为指标分析了我国1981年到1998年期间植被覆盖变化情况,给出了植被急剧减少产生新沙源的实例。通过对1998年4月强沙尘暴的分析,指出影响沙尘暴产生和运移的因素除了地形、风速、风向、大气稳定度外,当地植被覆盖和土壤因素也是关键因素之一。并通过对植被覆盖度（NDVI）与浮尘指数（Aerosol Index）进行定量分析,发现二者之间存在明显的负相关关系,表明植被的存在可以从一定程度上抑制浮尘现象的产生。因此,在沙尘运移路径上,采取封山封荒,植树种草,增加植被覆盖度以固结当地土壤和泥沙的措施,可以在一定程度上抑制沙尘暴灾害的发生。
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| 关 键 词： | 沙尘暴 植被指数 浮尘指数 变换探测 遥感 |
NDVI and the conditions of generating sandstorm |
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| CHEN Zhigang,ZHOU Jianhua.NDVI and the conditions of generating sandstorm[J].Ecology and Environmnet,2010,19(4):870-876. |
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| Authors: | CHEN Zhigang ZHOU Jianhua |
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| Institution: | CHEN Zhigang,ZHOU Jianhua Key Lab of GIS,Educational Ministry,East China Normal University,Shanghai 200062,China |
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| Abstract: | The change of vegetation cover from 1981 to 1998 in China was analyzed using normalized difference vegetation index as the indicator,then the situation that new sand source formation caused by the drastic reduction of vegetation cover was presented.Local vegetation cover and soil factor are the key factors affecting the generation and migration of sandstorm besides terrain,wind speed and direction,atmospheric stability by the analysis of sandstorm in April 1998.And the quantitative analysis of NDVI and Aero... |
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| Keywords: | sandstorm NDVI Aerosol detecting change remote sensing |
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