研究论文
郭婉臻,张飞,夏楠,Hsiang-te KUNG,王敬哲.近十年中国陆地AOD时空分布及与城市化的关系研究[J].环境科学学报,2019,39(7):2339-2352
近十年中国陆地AOD时空分布及与城市化的关系研究
- Spatio-temporal characteristics of aerosol optical depth and their relationship with urbanization over China's land in nearly a decade
- 基金项目：中国科学院战略性先导科技专项（No.XDA20040400）；新疆维吾尔自治区天山英才项目（No.40007001029）
- 作者
- 单位
- 郭婉臻
- 1. 新疆大学资源与环境科学学院, 乌鲁木齐 830046;2. 新疆大学绿洲生态教育部重点实验室, 乌鲁木齐 830046;3. 新疆智慧城市与环境建模普通高校重点实验室, 乌鲁木齐 830046
- 张飞
- 1. 新疆大学资源与环境科学学院, 乌鲁木齐 830046;2. 新疆大学绿洲生态教育部重点实验室, 乌鲁木齐 830046;3. 新疆智慧城市与环境建模普通高校重点实验室, 乌鲁木齐 830046
- 夏楠
- 1. 新疆大学资源与环境科学学院, 乌鲁木齐 830046;2. 新疆大学绿洲生态教育部重点实验室, 乌鲁木齐 830046;3. 新疆智慧城市与环境建模普通高校重点实验室, 乌鲁木齐 830046
- Hsiang-te KUNG
- 美国孟菲斯大学地球科学系, 孟菲斯 38152
- 王敬哲
- 1. 新疆大学资源与环境科学学院, 乌鲁木齐 830046;2. 新疆大学绿洲生态教育部重点实验室, 乌鲁木齐 830046;3. 新疆智慧城市与环境建模普通高校重点实验室, 乌鲁木齐 830046
- 摘要：选取2008-2017年MODIS（Moderate-resolution Imaging Spectrometer）Aqua C006气溶胶产品数据，分析近10年中国陆地气溶胶光学厚度（Aerosol optical depth，AOD）时间序列变化规律、空间格局分布特征，同时比较了"三区十群"区域内外的AOD变化差异.同时，通过DMSP/OLS（Defense Meteorological Satellite System/Operational Linescan System）夜间灯光产品与AOD关系研究分析，以反映城市化进程中人类活动对AOD时空分布的影响.结果表明：①中国陆地AOD多年平均、季节分布特征符合"胡焕庸线".在时间尺度上，2008-2017年中国陆地AOD年际变化范围是0.279~0.368，整体呈现下降趋势且变化幅度较小；在空间分布上，2008-2017年高值区为京津冀地区、华中地区、长三角地区、珠三角地区及塔里木盆地，低值区为青藏高原、云贵高原、内蒙古高原等；AOD时空分布呈较强的季节性，春季AOD最高，秋季最低.②中国区域的夜间灯光图与AOD时空分布具有较好的一致性，也符合"胡焕庸线".人口稠密、城市化较快的东部地区出现大片光带，快速发展的城市光斑覆盖明显.2008-2013年间，城市亮度范围有一定程度的扩大，说明人类经济生产活动增加明显.③2010-2013年省级行政区的DMSP/OLS夜间灯光与其AOD表现为显著正相关，二者幂函数拟合度R2分别为0.8036、0.8263、0.7701、0.8277、0.8331.DMSP/OLS夜间灯光与AOD呈显著正相关，说明城市化发展水平对气溶胶分布的影响作用显著.
- Abstract：Urbanization has been the major cause of increasing aerosol in the environment. Aerosol had great influence on human health and ecological environment, and aerosol optical depth (AOD) was a key indicator of aerosol. In this paper, the impact of urbanization on AOD in China during January 2008 to December 2017 is studied using MODIS AOD (MYD03_M3 remote sensing images) data and DMSP/OLS night-time light data. And the differences of AOD concentration inside and outside the area of "three districts and ten groups" were especially compared.The results showed that, the overall spatial characteristics of AOD in China exhibited a significant difference on the two sides of "Hu Line". High AOD values can be found in Beijing-Tianjin-Hebei, Yangtze River Delta and Central China, while the western region (except the Tarim Basin) has much lower AOD values. During 2008-2017, the average annual AOD value in China was 0.332, while in spring, summer autumn and winter, the average annual AOD value were 0.434, 0.344, 0.248, 0.304, respectively. During 2008-2012, the growth rate of AOD in China was -0.033, while it changes to -0.149 during 2013-2017. The AOD growth rate in spring and winter were -0.318,-0.130, respectively, and the fall was larger in spring. The spatial-temporal characteristics of night-time light in China's land also conformed to the "Hu Line", and it was roughly the same as the spatial-temporal characteristics of AOD. In the year of 2008-2013, the eastern coast of China was much brightly than the western interior, and densely populated provinces and cities increased significantly, and the range of brightness increased to a great extent, showing the process of urbanization in China. The AOD values and nighttime light data were highly correlated, and the statistical relationship between them was found by the least square method. The power function's R2 value were 0.8036, 0.8263, 0.7701, 0.8277 and 0.8331 respectively. The process of urbanization had a significant impact on the spatio-temporal characteristics of AOD, which caused the complexity of the aerosol and atmosphere environment.
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