乌鲁木齐城市绿地景观格局与AOD的关系研究

Study on the Relationship between Urban Green Space Landscape Pattern and AOD in Urumqi

  • 摘要: 以乌鲁木齐市作为研究区,利用2010年、2015年、2020年三期的MOD04_L2气溶胶产品数据和MOD13A3归一化植被指数月产品,运用像元二分法、Pearson相关系数方法,在大尺度上对其时空分布特征进行分析。结果表明:(1)气溶胶光学厚度(AOD)月度变化的高值在4月和8月,季度变化的高值在春季和夏季,年度变化的高值在2020年,空间上的变化主要集中在米东区和中心城区。(2)气溶胶光学厚度(AOD)与植被覆盖度成呈负相关。(3)不同土地覆盖类型上气溶胶光学厚度(AOD)及植被覆盖度的分布存在差异。

     

    Abstract: Taking Urumqi city as the research area, this paper analyzed the spatial and temporal distribution characteristics of aerosol products on a large scale by using the MOD04-L2 aerosol product data of 2010, 2015 and 2020 and the MOD13A3 normalized vegetation index monthly product using pixel dichotomy and Pearson correlation coefficient method. The results showed that the monthly variation of aerosol optical depth((AOD) was high in April and August, the quarterly variation was high in spring and summer, and the annual variation was high in 2020; The spatial changes were mainly concentrated in Midong district and the central city. AOD was negatively correlated with vegetation coverage. There were differences in the distribution of AOD and vegetation coverage on different land cover types.

     

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