Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1088/1748-9326/ab8b12 |
Visibility as a proxy for air quality in East Africa | |
Singh, Ajit1; Avis, William R.2; Pope, Francis D.1 | |
2020-08-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS |
ISSN | 1748-9326 |
出版年 | 2020 |
卷号 | 15期号:8 |
文章类型 | Article |
语种 | 英语 |
国家 | England |
英文摘要 | Many urban areas in Africa do not have sufficient monitoring programs to understand their air quality. This study uses visibility as a proxy for PM pollution to provide insight into PM air pollution in three East African cities: Addis Ababa, Nairobi and Kampala, from 1974 to 2018. Overall, a significant loss in East African visibility was observed since the 1970s, where Nairobi shows the greatest loss (60%), as compared to Kampala (56%) and Addis Ababa (34%). These changes are likely due to increased anthropogenic PM emissions. Correspondingly, PM pollution levels, in Kampala, Nairobi and Addis Ababa, are estimated to have increased by 162, 182 and 62%, respectively, since the 1970s to the current period. Distinct variations in seasonal visibility are observed, which are largely explained by changing PM sources and sinks in rainy and dry seasons. Average PM hygroscopicity is investigated by comparing average visibilities under different RH conditions. It is observed that PM hygroscopicity has decreased over time in all three cities, which is consistent with increasing emissions of PM with hygroscopicity lower than the ambient background. A large urban increment in PM is observed, with poor visibility typically occurring when the wind brings air from densely populated urban areas. To investigate the intersection between increasing pollution, population and economic growth, changes in pollution are compared to available population growth and GDP statistics. Significant positive correlations between increasing PM and national GDP (and city population) were found for all three study cities. These cities have undergone rapid increases in population and national GDP growth (driven predominantly by study cities' economies) during the study period. This has resulted in increased rates of citywide fuel use and motorization, which provides a direct link to increased PM emissions and thus visibility loss. The study suggests that socio-economic forecasts may enable future air quality projections. |
英文关键词 | visibility air pollution environmental kuznet' s curve particulate matter East Africa PM |
领域 | 气候变化 |
收录类别 | SCI-E ; SSCI |
WOS记录号 | WOS:000553501900001 |
WOS关键词 | ENVIRONMENTAL KUZNETS CURVE ; AEROSOL COMPOSITION ; ECONOMIC-GROWTH ; POLLUTION ; DEGRADATION ; TRENDS ; CITY ; NAIROBI ; KAMPALA ; HEALTH |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/289408 |
专题 | 气候变化 |
作者单位 | 1.Univ Birmingham, Sch Geog Earth & Environm Sci, Birmingham B15 2TT, W Midlands, England; 2.Univ Birmingham, Sch Govt, Int Dev Dept, Birmingham B15 2TT, W Midlands, England |
推荐引用方式 GB/T 7714 | Singh, Ajit,Avis, William R.,Pope, Francis D.. Visibility as a proxy for air quality in East Africa[J]. ENVIRONMENTAL RESEARCH LETTERS,2020,15(8). |
APA | Singh, Ajit,Avis, William R.,&Pope, Francis D..(2020).Visibility as a proxy for air quality in East Africa.ENVIRONMENTAL RESEARCH LETTERS,15(8). |
MLA | Singh, Ajit,et al."Visibility as a proxy for air quality in East Africa".ENVIRONMENTAL RESEARCH LETTERS 15.8(2020). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论