期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 816, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2021.151558
关键词
Aerosol pollution; Arid region; Climate change; Population exposure risk; Risk modeling
资金
- National Natural Science Foundation of China [U1803243, 42101302]
- Strategic Priority Research Programof the Chinese Academy of Sciences [XDA2006030201]
With the progress of urbanization, the increase in aerosol optical depth (AOD) in the arid Central Asia (ACA) has caused atmospheric pollution and physical health issues. This study evaluated the population exposure risk to AOD in six ecological zones based on remote sensing data and a population exposure risk model. The results showed that AOD in ACA has been increasing, especially in the Hexi corridor desert area and areas near the Aral Sea. The highest AOD was observed in spring and autumn, while the lowest was in winter. Land use changes, such as the reduction of water bodies and expansion of construction lands, contributed significantly to the increase in AOD.
With the progress of urbanization, atmospheric pollution and physical health issues caused by the increase of aerosol optical depth (AOD) become more and more prominent. Hence, population exposure risk to AOD becomes a research hotspot. The arid Central Asia (ACA) has a generally high AOD and is a major source area for dust aerosols in the world. Only few studies have discussed population exposure risk to AOD in ACA. Based on multisource remote sensing data, and used population exposure risk model, this study evaluated population exposure risk to AOD in six ecological zones (Northern steppe region of ACA (NSCA), Aral Sea desert area (ASDA), Tianshan Mountains (TSMT), Junggar Basin desert area (JBDA), Tarim Basin desert area (TBDA) and Hexi corridor desert area (HCDA)). Generally, AOD in ACA was kept increasing from 2000 to 2015, and it increased mostly in HCDA and areas near the Aral Sea (p < 0.001). With respect to seasonal variations, the maximum AOD was observed in spring and autumn, and the minimum was in winter. Considering land use changes, AOD was mainly manifested by the reduction of water bodies and expansion of construction lands. This was the mostly significant in NSCA and ASDA (p < 0.01). The population exposure risk to AOD in ACA was increasing continuously from 2000 to 2015, and high-value regions (>9) concentrated in oases, specifically, in the Aral Sea basin and Tarim River basin.The Aral Sea basin became the major AOD source region in ACA due to the shrinking water area after unreasonable development and utilization of water resources. These further increase population exposure risk to AOD in the Aral Sea area. Hence, ecological restoration in terminal lakes of ACA will become the key to lower population exposure risk to AOD practically. (c) 2021 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据