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Monitoring the Spatial Variation of Aerosol Optical Depth and Its Correlation with Land Use/Land Cover in Wuhan, China: A Perspective of Urban Planning

Author

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  • Qijiao Xie

    (Faculty of Resources and Environmental Science, Hubei University, Wuhan 430062, China
    Key Laboratory of Regional Development and Environmental Response (Hubei Province), Wuhan 430062, China)

  • Qi Sun

    (Faculty of Resources and Environmental Science, Hubei University, Wuhan 430062, China)

Abstract

Aerosols significantly affect environmental conditions, air quality, and public health locally, regionally, and globally. Examining the impact of land use/land cover (LULC) on aerosol optical depth (AOD) helps to understand how human activities influence air quality and develop suitable solutions. The Landsat 8 image and Moderate Resolution Imaging Spectroradiometer (MODIS) aerosol products in summer in 2018 were used in LULC classification and AOD retrieval in this study. Spatial statistics and correlation analysis about the relationship between LULC and AOD were performed to examine the impact of LULC on AOD in summer in Wuhan, China. Results indicate that the AOD distribution expressed an obvious “basin effect” in urban development areas: higher AOD values concentrated in water bodies with lower terrain, which were surrounded by the high buildings or mountains with lower AOD values. The AOD values were negatively correlated with the vegetated areas while positively correlated to water bodies and construction lands. The impact of LULC on AOD varied with different contexts in all cases, showing a “context effect”. The regression correlations among the normalized difference vegetation index (NDVI), normalized difference built-up index (NDBI), normalized difference water index (NDWI), and AOD in given landscape contexts were much stronger than those throughout the whole study area. These findings provide sound evidence for urban planning, land use management and air quality improvement.

Suggested Citation

  • Qijiao Xie & Qi Sun, 2021. "Monitoring the Spatial Variation of Aerosol Optical Depth and Its Correlation with Land Use/Land Cover in Wuhan, China: A Perspective of Urban Planning," IJERPH, MDPI, vol. 18(3), pages 1-18, January.
    • Handle: RePEc:gam:jijerp:v:18:y:2021:i:3:p:1132-:d:488289
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    References listed on IDEAS

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    5. Bin Zou & Shan Xu & Troy Sternberg & Xin Fang, 2016. "Effect of Land Use and Cover Change on Air Quality in Urban Sprawl," Sustainability, MDPI, vol. 8(7), pages 1-14, July.
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    1. Celemin Juan Pablo & Arias Maria Eugenia, 2022. "Relationship between densification and NDVI loss. A study using the Google Earth Engine at local scale," Environmental & Socio-economic Studies, Sciendo, vol. 10(3), pages 33-42, September.

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