| 利用Landsat/TM影像监测北京地区气溶胶的空间分布 |
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| 引用本文： | 王耀庭,王桥,杨一鹏,王艳姣.利用Landsat/TM影像监测北京地区气溶胶的空间分布[J].地理与地理信息科学,2005,21(3):19-22. |
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| 作者姓名： | 王耀庭 王桥 杨一鹏 王艳姣 |
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| 作者单位： | 南京师范大学地理信息科学江苏省重点实验室,江苏,南京,210097 |
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| 摘 要： | 该文利用北京地区两景高分辨率Landsat5／TM卫星遥感影像第一波段(0．45-0．52μm)数据，采用表观反射率标准方差之比法对北京地区的气溶胶空间分布进行半定量描述，计算同一日大气能见度空间分布。气溶胶空间分布的总体特征为：北京西部、北部、东北部气溶胶光学厚度明显低于西南部、南部、东南部，从西北部山区向东南部平原气溶胶分布一般呈递增趋势，高值集中在市区中心，大值覆盖区域偏向城区东南；对应的当日大气能见度空间分布则相反。分析造成大气污染的原因，并对该方法的局限性以及需要改进之处进行讨论。
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| 关 键 词： | 气溶胶 空间分布 大气污染 北京 |
| 文章编号： | 1672-0504(2005)03-0019-04 |
| 修稿时间： | 2005年3月29日 |
Monitoring Spatial Distribution of Aerosols in Beijing Based on Landsat TM Data |
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| WANG Yao-ting,WANG Qiao,YANG Yi-peng,WANG Yan-jiao.Monitoring Spatial Distribution of Aerosols in Beijing Based on Landsat TM Data[J].Geography and Geo-Information Science,2005,21(3):19-22. |
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| Authors: | WANG Yao-ting WANG Qiao YANG Yi-peng WANG Yan-jiao |
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| Abstract: | In this paper,two Landsat 5/TM high resolution images were used in an effort to assess spatial distribution of aerosol by calculating ratio of standard deviation of the apparent reflectance.And spatial distribution of air visibility in the same day was calculated in Beijing.The results show that the concentration distribution of aerosol in Beijing can be described semi-quantitatively by the methods mentioned above.The general characteristics of spatial distribution are that aerosol optical depth in west,north and north-east is lower than that in south-west,south and south-east in Beijing,the aerosol optical depth increases gradually from mountainous areas in west and north to plain in east and south,big value is in cantonal center and the maximum value excurses to cantonal south-east.However,the case of the air visibility spatial distribution is adverse.At the same time,the causation of the pollution was analysed and the limitation and improvement need to be done were discussed. |
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| Keywords: | aerosol spatial distribution air pollution Beijing |
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