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  Black Carbon in Surface Soil and Its Sources in Three Central Asian Countries

Rupakheti, D., Kang, S., Rupakheti, M., Chen, P., Gautam, S., Rai, M., Yin, X., Kang, H. (2021 online): Black Carbon in Surface Soil and Its Sources in Three Central Asian Countries. - Archives of Environmental Contamination and Toxicology.
https://doi.org/10.1007/s00244-021-00832-4

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Item Permalink: https://publications.iass-potsdam.de/pubman/item/item_6000823 Version Permalink: https://publications.iass-potsdam.de/pubman/item/item_6000823_1
Genre: Journal Article

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 Creators:
Rupakheti, Dipesh1, Author
Kang, Shichang1, Author
Rupakheti, Maheswar2, Author              
Chen, Pengfei1, Author
Gautam, Sangita1, Author
Rai, Mukesh1, Author
Yin, Xiufeng1, Author
Kang, Huhu1, Author
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1External Organizations, ou_persistent22              
2IASS Institute for Advanced Sustainability Studies Potsdam, ou_96022              

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 Abstract: Black carbon (BC) aerosol impacts the air quality, public health, agricultural productivity, weather, monsoon, cryosphere, and climate system from the local to the global scale. However, its distribution over vast Central Asia is poorly known, because it is one of the poorly sampled regions of the world. BC in the soil can be resuspended into the atmosphere and transported to downwind regions with sensitive ecosystems and vulnerable populations, such as from Central Asian countries to the cryospheric regions in the Tianshan Mountain and the Tibetan Plateau, which could accelerate the melting of the snowfields and glaciers. We report the distribution of BC and total organic carbon (TOC) in surface soil with samples collected at multiple sites, for the first time, over three countries in Central Asia (Uzbekistan, Tajikistan, and Kyrgyzstan). The mean BC (TOC) concentrations over three countries were 0.06 ± 0.06 (11.86 ± 4.84) mg g−1, 0.15 ± 0.21 (20.35 ± 10.96) mg g−1, and 0.32 ± 0.29 (26.45 ± 20.38) mg g−1, respectively. They were found to be originated from the same or similar sources, at least over Tajikistan and Kyrgyzstan, as indicated by their high and significant correlation (R2 > 0.6, p < 0.001). The char/soot ratio indicated the diesel and gasoline combustion as dominant BC sources over this region. To gain further insights into the soil BC and its implications to air quality, climate, and cryosphere, future studies should include a wider area over Central Asia with different land-use types and other soil parameters combined with atmospheric simulations for this important yet relatively less studied region of the world.

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Language(s): eng - English
 Dates: 2021-042021-03-27
 Publication Status: Published online
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 Identifiers: DOI: 10.1007/s00244-021-00832-4
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Title: Archives of Environmental Contamination and Toxicology
Source Genre: Journal
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Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: ISSN: 0090-4341
ISSN: 1432-0703