标題: Analysis of the urban turbidity island effect: a case study in Beijing City, China

作者: Luan, QZ (Luan, Qingzu); Yang, MC (Yang, M. Chang); Feng, TQ (Feng, Tianqi); Huang, WL (Huang, Wenli)

來源出版物: ENVIRONMENTAL RESEARCH LETTERS 卷: 18 期: 2 文獻号: 024010 DOI: 10.1088/1748-9326/acaf8f 出版年: FEB 1 2023

摘要: The urban turbidity island (UTI) effect is an important research topic in urban climate studies. It is closely related to urban visibility and the health of urban residents; however, it has received little attention in previous research. This study analyzes the temporal and spatial distribution characteristics of the UTI effect through the combined use of satellite remote sensing and ground observation data. Specifically, absolute and relative urban turbidity island intensity (UTII_A and UTII_R) indices are proposed and calculated for 2000-2020 by using aerosol data products and atmospheric fine particle mass concentration inversion products, which are represented by aerosol optical depth (AOD), PM1, PM2.5, and PM10. The results show the following: (a) there has been a clear footprint of the UTI effect in Beijing since 2000, generally consistent with trends of urban sprawl; (b) there are great differences in the interannual distribution of AOD, normalized AOD and PM values in urban and suburban areas; and (c) there are seasonal differences in the UTI distribution and air pollutant concentrations. The differences among indices between urban and suburban areas are mainly caused by heat island-induced air convection, complex structures in urban areas and regional weather conditions. Importantly, the interannual distribution of AOD and UTII_A of PM values decreased from 2014 to 2020, indicating that the government's air pollution control policy has significantly improved air quality. Analysis from this study could support the formulation of urban planning and control policies to guide human activities.

作者關鍵詞: urban turbidity island; Beijing City; AOD; PM1; PM2 5; PM10

地址: [Luan, Qingzu; Feng, Tianqi; Huang, Wenli] Wuhan Univ, Sch Resource & Environm Sci, Hubei 430079, Peoples R China.

[Luan, Qingzu] Beijing Municipal Bur Meteorol, Beijing Municipal Climate Ctr, Beijing 100089, Peoples R China.

[Yang, M. Chang] China Univ Geosci, Sch Land Sci & Technol, Beijing 100083, Peoples R China.

通訊作者地址: Huang, WL (通訊作者)，Wuhan Univ, Sch Resource & Environm Sci, Hubei 430079, Peoples R China.

電子郵件地址: wenli.huang17@gmail.com

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