Brief communication: An alternative method for estimating the scavenging efficiency of black carbon by meltwater over sea ice
The meltwater scavenging coefficient (MSC) of black carbon (BC) is a crucial parameter in snow and sea ice models, as it determines the BC enrichment in the surface layer of melting snow over sea ice and therefore modulates the BC–snow–albedo feedbacks. We present a new method for MSC estimation by...
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ftcopernicus:oai:publications.copernicus.org:tc77555 2023-05-15T13:11:56+02:00 Brief communication: An alternative method for estimating the scavenging efficiency of black carbon by meltwater over sea ice Dou, Tingfeng Du, Zhiheng Li, Shutong Zhang, Yulan Zhang, Qi Hao, Mingju Li, Chuanjin Tian, Biao Ding, Minghu Xiao, Cunde 2019-12-11 application/pdf https://doi.org/10.5194/tc-13-3309-2019 https://tc.copernicus.org/articles/13/3309/2019/ eng eng doi:10.5194/tc-13-3309-2019 https://tc.copernicus.org/articles/13/3309/2019/ eISSN: 1994-0424 Text 2019 ftcopernicus https://doi.org/10.5194/tc-13-3309-2019 2020-07-20T16:22:32Z The meltwater scavenging coefficient (MSC) of black carbon (BC) is a crucial parameter in snow and sea ice models, as it determines the BC enrichment in the surface layer of melting snow over sea ice and therefore modulates the BC–snow–albedo feedbacks. We present a new method for MSC estimation by sampling the melt–refreeze ice layer that is produced from refreezing of the meltwater within snowpack and its overlying snow and measuring their physical characteristics in Elson Lagoon northeast of Utqiaġvik (formerly Barrow), Alaska, during the melting season. The bias of estimated MSC ranges from −5.4 % to 7.3 %, which is not exactly dependent on the degree of ablation. The average MSC value calculated with this proposed method is slightly lower than that derived from the repeating sampling (RS) method in Elson Lagoon while still being within its best estimate range. Further estimation demonstrates that the MSC in the Canada Basin ( 23.6 % ±2.1 % ) is close to that in Greenland ( 23.0 % ±12.5 % ) and larger than that in the Chukchi Sea ( 17.9 % ±5.0 % ) in the northwest of Utqiaġvik. Elson Lagoon has the lowest MSC ( 14.5 % ±2.6 % ) in the study areas. The method suggested in this study provides a possible approach for large-scale measurements of MSC over the sea ice area in the Arctic. Of course, this method depends on the presence of a melt–refreeze ice layer in the observation area. Text albedo Arctic Barrow black carbon canada basin Chukchi Chukchi Sea Greenland Sea ice Alaska Copernicus Publications: E-Journals Arctic Chukchi Sea Canada Greenland The Cryosphere 13 12 3309 3316 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
The meltwater scavenging coefficient (MSC) of black carbon (BC) is a crucial parameter in snow and sea ice models, as it determines the BC enrichment in the surface layer of melting snow over sea ice and therefore modulates the BC–snow–albedo feedbacks. We present a new method for MSC estimation by sampling the melt–refreeze ice layer that is produced from refreezing of the meltwater within snowpack and its overlying snow and measuring their physical characteristics in Elson Lagoon northeast of Utqiaġvik (formerly Barrow), Alaska, during the melting season. The bias of estimated MSC ranges from −5.4 % to 7.3 %, which is not exactly dependent on the degree of ablation. The average MSC value calculated with this proposed method is slightly lower than that derived from the repeating sampling (RS) method in Elson Lagoon while still being within its best estimate range. Further estimation demonstrates that the MSC in the Canada Basin ( 23.6 % ±2.1 % ) is close to that in Greenland ( 23.0 % ±12.5 % ) and larger than that in the Chukchi Sea ( 17.9 % ±5.0 % ) in the northwest of Utqiaġvik. Elson Lagoon has the lowest MSC ( 14.5 % ±2.6 % ) in the study areas. The method suggested in this study provides a possible approach for large-scale measurements of MSC over the sea ice area in the Arctic. Of course, this method depends on the presence of a melt–refreeze ice layer in the observation area. |
format |
Text |
author |
Dou, Tingfeng Du, Zhiheng Li, Shutong Zhang, Yulan Zhang, Qi Hao, Mingju Li, Chuanjin Tian, Biao Ding, Minghu Xiao, Cunde |
spellingShingle |
Dou, Tingfeng Du, Zhiheng Li, Shutong Zhang, Yulan Zhang, Qi Hao, Mingju Li, Chuanjin Tian, Biao Ding, Minghu Xiao, Cunde Brief communication: An alternative method for estimating the scavenging efficiency of black carbon by meltwater over sea ice |
author_facet |
Dou, Tingfeng Du, Zhiheng Li, Shutong Zhang, Yulan Zhang, Qi Hao, Mingju Li, Chuanjin Tian, Biao Ding, Minghu Xiao, Cunde |
author_sort |
Dou, Tingfeng |
title |
Brief communication: An alternative method for estimating the scavenging efficiency of black carbon by meltwater over sea ice |
title_short |
Brief communication: An alternative method for estimating the scavenging efficiency of black carbon by meltwater over sea ice |
title_full |
Brief communication: An alternative method for estimating the scavenging efficiency of black carbon by meltwater over sea ice |
title_fullStr |
Brief communication: An alternative method for estimating the scavenging efficiency of black carbon by meltwater over sea ice |
title_full_unstemmed |
Brief communication: An alternative method for estimating the scavenging efficiency of black carbon by meltwater over sea ice |
title_sort |
brief communication: an alternative method for estimating the scavenging efficiency of black carbon by meltwater over sea ice |
publishDate |
2019 |
url |
https://doi.org/10.5194/tc-13-3309-2019 https://tc.copernicus.org/articles/13/3309/2019/ |
geographic |
Arctic Chukchi Sea Canada Greenland |
geographic_facet |
Arctic Chukchi Sea Canada Greenland |
genre |
albedo Arctic Barrow black carbon canada basin Chukchi Chukchi Sea Greenland Sea ice Alaska |
genre_facet |
albedo Arctic Barrow black carbon canada basin Chukchi Chukchi Sea Greenland Sea ice Alaska |
op_source |
eISSN: 1994-0424 |
op_relation |
doi:10.5194/tc-13-3309-2019 https://tc.copernicus.org/articles/13/3309/2019/ |
op_doi |
https://doi.org/10.5194/tc-13-3309-2019 |
container_title |
The Cryosphere |
container_volume |
13 |
container_issue |
12 |
container_start_page |
3309 |
op_container_end_page |
3316 |
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1766249602705522688 |