The Driving Influence of Multi-Dimensional Urbanization on PM2.5 Concentrations in Africa

New Evidence from Multi-Source Remote Sensing Data, 2000–2018

Datos Bibliográficos

ID17801030
AutoresGuoen Wei (0000-0002-2054-7623, Nanjing University), Pingjun Sun (0000-0003-2924-786X, Southwest University), Shengnan Jiang (0000-0001-7083-595X, Nanjing University), Yang Shen (0000-0003-2895-3068, Nanjing University), Binglin Liu (0000-0002-8376-1694, Nanjing University), Zhenke Zhang (0000-0003-2751-1153, Nanjing University, autor de correspondencia), Xiao Ouyang (0000-0001-7909-6022, Hunan University of Finance and Economics, autor de correspondencia)
Año2021
Volumen18
Número17
Páginas9389-9389
Fecha de publicación2021-09-06
Peer ReviewedSí
Open AccessSí
TipoARTICLE
RevistaInternational Journal of Environmental Research and Public Health (JOURNAL)
Identificadores de la revistaISSN: 1661-7827 • E-ISSN: 1660-4601
EditorialMultidisciplinary Digital Publishing Institute (PUBLISHER • CH)
DOI10.3390/ijerph18179389
PMID34501979
OpenAlexW3197172241
IdiomaEN
Citas recibidas6
Referencias citadas20

Africa's PM 2.5 pollution has become a security hazard, but the understanding of the varying effects of urbanization on driven mechanisms of PM 2.5 concentrations under the rapid urbanization remains largely insufficient. Compared with the direct impact, the spillover effect of urbanization on PM 2.5 concentrations in adjacent regions was underestimated. Urbanization is highly multi-dimensional phenomenon and previous studies have rarely distinguished the different driving influence and interactions of multi-dimensional urbanization on PM 2.5 concentrations in Africa. This study combined grid and administrative units to explore the spatio-temporal change, spatial dependence patterns, and evolution trend of PM 2.5 concentrations and multi-dimensional urbanization in Africa. The differential influence and interaction effects of multi-dimensional urbanization on PM 2.5 concentrations under Africa's rapid urbanization was further analyzed. The results show that the positive spatial dependence of PM 2.5 concentrations gradually increased over the study period 2000-2018. The areas with PM 2.5 concentrations exceeding 35 μg/m 3 increased by 2.2%, and 36.78% of the African continent had an increasing trend in Theil-Sen index. Urbanization was found to be the main driving factor causing PM 2.5 concentrations changes, and economic urbanization had a stronger influence on air quality than land urbanization or population urbanization. Compared with the direct effect, the spillover effect of urbanization on PM 2.5 concentrations in two adjacent regions was stronger, particularly in terms of economic urbanization. The spatial distribution of PM 2.5 concentrations resulted from the interaction of multi-dimensional urbanization. The interaction of urbanization of any two different dimensions exhibited a nonlinear enhancement effect on PM 2.5 concentrations. Given the differential impact of multi-dimensional urbanization on PM 2.5 concentrations inside and outside the region, this research provides support for the cross-regional joint control strategies of air pollution in Africa. The findings also indicate that PM 2.5 pollution control should not only focus on urban economic development strategies but should be an optimized integration of multiple mitigation strategies, such as improving residents' lifestyles, optimizing land spatial structure, and upgrading the industrial structure

Biology · Economic geography · Economics · Environmental health · Geography · Population · Spillover effect · Urbanization · Air Quality and Health Impacts · Environmental Science · Impact of Light on Environment and Health · Medicine · Urban Transport and Accessibility · Ecology