Light-absorbing impurities in snow cover across Northern Xinjiang, China
Abstract Light-absorbing impurities (LAIs, e.g. black carbon (BC), organic carbon (OC), mineral dust (MD)) deposited on snow cover reduce albedo and accelerate its melting. Northern Xinjiang (NX) is an arid and semi-arid inland region, where snowmelt leads to frequent floods that have been a serious...
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Online Access: | http://dx.doi.org/10.1017/jog.2019.69 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143019000698 |
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crcambridgeupr:10.1017/jog.2019.69 2024-09-15T18:15:39+00:00 Light-absorbing impurities in snow cover across Northern Xinjiang, China Zhong, Xinyue Kang, Shichang Zhang, Wei Yang, Junhua Li, Xiaofei Zhang, Yulan Liu, Yajun Chen, Pengfei 2019 http://dx.doi.org/10.1017/jog.2019.69 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143019000698 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Journal of Glaciology volume 65, issue 254, page 940-956 ISSN 0022-1430 1727-5652 journal-article 2019 crcambridgeupr https://doi.org/10.1017/jog.2019.69 2024-07-31T04:04:28Z Abstract Light-absorbing impurities (LAIs, e.g. black carbon (BC), organic carbon (OC), mineral dust (MD)) deposited on snow cover reduce albedo and accelerate its melting. Northern Xinjiang (NX) is an arid and semi-arid inland region, where snowmelt leads to frequent floods that have been a serious threat to local ecological security. There is still a lack of quantitative assessments of the effects of LAIs on snowmelt in the region. This study investigates spatial variations of LAIs in snow and its effect on snow albedo, radiative forcing (RF) and snowmelt across NX. Results showed that concentrations of BC, OC (only water-insoluble OC), MD ranged from 32 to 8841 ng g −1 , 77 to 8568 ng g −1 and 0.46 to 236 µg g −1 , respectively. Weather Research and Forecasting Chemistry model suggested that residential emission was the largest source of BC. Snow, Ice, and Aerosol Radiative modelling showed that the average contribution of BC and MD to snow albedo reduction was 17 and 3%, respectively. RF caused by BC significantly exceeded RF caused by MD. In different scenarios, changes in snow cover duration (SCD) caused by BC and MD decreased by 1.36 ± 0.61 to 6.12 ± 3.38 d. Compared with MD, BC was the main dominant factor in reducing snow albedo and SCD across NX. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 65 254 940 956 |
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Cambridge University Press |
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English |
description |
Abstract Light-absorbing impurities (LAIs, e.g. black carbon (BC), organic carbon (OC), mineral dust (MD)) deposited on snow cover reduce albedo and accelerate its melting. Northern Xinjiang (NX) is an arid and semi-arid inland region, where snowmelt leads to frequent floods that have been a serious threat to local ecological security. There is still a lack of quantitative assessments of the effects of LAIs on snowmelt in the region. This study investigates spatial variations of LAIs in snow and its effect on snow albedo, radiative forcing (RF) and snowmelt across NX. Results showed that concentrations of BC, OC (only water-insoluble OC), MD ranged from 32 to 8841 ng g −1 , 77 to 8568 ng g −1 and 0.46 to 236 µg g −1 , respectively. Weather Research and Forecasting Chemistry model suggested that residential emission was the largest source of BC. Snow, Ice, and Aerosol Radiative modelling showed that the average contribution of BC and MD to snow albedo reduction was 17 and 3%, respectively. RF caused by BC significantly exceeded RF caused by MD. In different scenarios, changes in snow cover duration (SCD) caused by BC and MD decreased by 1.36 ± 0.61 to 6.12 ± 3.38 d. Compared with MD, BC was the main dominant factor in reducing snow albedo and SCD across NX. |
format |
Article in Journal/Newspaper |
author |
Zhong, Xinyue Kang, Shichang Zhang, Wei Yang, Junhua Li, Xiaofei Zhang, Yulan Liu, Yajun Chen, Pengfei |
spellingShingle |
Zhong, Xinyue Kang, Shichang Zhang, Wei Yang, Junhua Li, Xiaofei Zhang, Yulan Liu, Yajun Chen, Pengfei Light-absorbing impurities in snow cover across Northern Xinjiang, China |
author_facet |
Zhong, Xinyue Kang, Shichang Zhang, Wei Yang, Junhua Li, Xiaofei Zhang, Yulan Liu, Yajun Chen, Pengfei |
author_sort |
Zhong, Xinyue |
title |
Light-absorbing impurities in snow cover across Northern Xinjiang, China |
title_short |
Light-absorbing impurities in snow cover across Northern Xinjiang, China |
title_full |
Light-absorbing impurities in snow cover across Northern Xinjiang, China |
title_fullStr |
Light-absorbing impurities in snow cover across Northern Xinjiang, China |
title_full_unstemmed |
Light-absorbing impurities in snow cover across Northern Xinjiang, China |
title_sort |
light-absorbing impurities in snow cover across northern xinjiang, china |
publisher |
Cambridge University Press (CUP) |
publishDate |
2019 |
url |
http://dx.doi.org/10.1017/jog.2019.69 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143019000698 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 65, issue 254, page 940-956 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2019.69 |
container_title |
Journal of Glaciology |
container_volume |
65 |
container_issue |
254 |
container_start_page |
940 |
op_container_end_page |
956 |
_version_ |
1810453589397602304 |