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| DOI | 10.1016/j.atmosenv.2021.118651 |
| Characteristics of dust aerosols and identification of dust sources in Xinjiang, China | |
| Liu J.; Ding J.; Rexiding M.; Li X.; Zhang J.; Ran S.; Bao Q.; Ge X. | |
| 发表日期 | 2021 |
| ISSN | 1352-2310 |
| 卷号 | 262 |
| 英文摘要 | Changes in atmospheric particulate matter content directly affect the Earth-atmosphere system balance and climate change and indirectly affect the environment and ecology. Therefore, this matter is receiving increasing attention. A typical arid area with a fragile ecological environment and frequent dust activities, Xinjiang, China, was investigated using Moderate Resolution Imaging Spectroradiometer (MODIS) daily aerosol optical thickness and Ångström wavelength exponent data to obtain the temporal and spatial distribution characteristics of long-term dust aerosols over 20 years. The frequency of occurrence was calculated to accurately identify anthropogenic and natural sources, and data, such as wind speed, were superimposed to quantitatively estimate dust aerosol emissions. The factors that influenced dust aerosol emissions are discussed. The results show that the distribution of dust aerosols in South and North Xinjiang is obviously different, and the average dust aerosol optical depth (DOD) in spring is higher than that in other seasons. The sources of natural dust have little variation and are primarily located in Lop Nur, on the edges of the Taklamakan and Gurbantunggut deserts, in the central Tuha Basin, and in dried-up lakes. The sources of anthropogenic dust are mainly distributed in the farmland areas of the oasis plain and the impact fan plain. Natural dust aerosols are dominant in Xinjiang, with high natural dust emissions in spring. Changes in anthropogenic dust aerosols are caused by production activities, and the annual average anthropogenic dust emissions account for 8% of the total dust emissions. Precipitation can promote a reduction in natural dust emissions. Topography has an obvious effect on the formation and transportation of dust aerosols, which manifests as the frequent occurrence of dust in the basin. The population density data and Defense Meteorological Satellite Program/Operational Linescan System (DMSP/OLS) nighttime light data reveal, that the intensity of human activities has a great impact on anthropogenic dust aerosols. This study provides support for research on how aerosols affect climate and environmental changes in Xinjiang. © 2021 Elsevier Ltd |
| 关键词 | Arid areaDust aerosolsDust deposition fluxesDust sources |
| 语种 | 英语 |
| scopus关键词 | Aerosols; Arid regions; Climate change; Ecology; Optical properties; Population statistics; Radiometers; Wind; Aerosol emissions; Anthropogenics; Arid area; Atmospheric particulate matter; Dust aerosols; Dust deposition flux; Dust emission; Dust sources; Earth: atmosphere; Xinjiang; Dust; aerosol; anthropogenic source; dust; environmental change; identification key; identification method; MODIS; particulate matter; seasonal variation; spatiotemporal analysis; aerosol; agricultural land; article; climate; desert; environmental change; human; lake; optical depth; population density; precipitation; spring; thickness; topography; wind speed; Xinjiang; China |
| 来源期刊 | ATMOSPHERIC ENVIRONMENT
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| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/248260 |
| 作者单位 | Key Laboratory of Smart City and Environment Modelling of Higher Education Institute, College of Resources and Environment Science, Xinjiang University, Urumqi, 830046, China; Key Laboratory of Oasis Ecosystem, Xinjiang University, Urumqi, 830046, China; Technology Innovation Center for Central Asia Geo-Information Exploitation and Utilization, Ministry of Natural Resources, Xinjiang University, Urumqi, 830046, China |
| 推荐引用方式 GB/T 7714 | Liu J.,Ding J.,Rexiding M.,et al. Characteristics of dust aerosols and identification of dust sources in Xinjiang, China[J],2021,262. |
| APA | Liu J..,Ding J..,Rexiding M..,Li X..,Zhang J..,...&Ge X..(2021).Characteristics of dust aerosols and identification of dust sources in Xinjiang, China.ATMOSPHERIC ENVIRONMENT,262. |
| MLA | Liu J.,et al."Characteristics of dust aerosols and identification of dust sources in Xinjiang, China".ATMOSPHERIC ENVIRONMENT 262(2021). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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