Black carbon effects and seasonal isotope records in the Godwin-Austen snowpack and K2 high-altitude camps
This study investigates black carbon (BC) concentrations in the seasonal snowpack on the Godwin-Austen Glacier and in surface snow at K2 Camps 1 and 2 (Karakoram Range), assessing their impact on snowmelt during the 2019 ablation season. Potential BC and moisture sources were identified through back...
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| Format: | Article |
| Language: | English |
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Cambridge University Press
2025-01-01
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| Series: | Journal of Glaciology |
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| Online Access: | https://www.cambridge.org/core/product/identifier/S0022143024001114/type/journal_article |
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| author | Nicolás González-Santacruz Francisco Fernandoy Kumiko Goto-Azuma Motohiro Hirabayashi Raul R. Cordero Sarah Feron Sérgio Henrique Faria |
| author_facet | Nicolás González-Santacruz Francisco Fernandoy Kumiko Goto-Azuma Motohiro Hirabayashi Raul R. Cordero Sarah Feron Sérgio Henrique Faria |
| author_sort | Nicolás González-Santacruz |
| collection | DOAJ |
| description | This study investigates black carbon (BC) concentrations in the seasonal snowpack on the Godwin-Austen Glacier and in surface snow at K2 Camps 1 and 2 (Karakoram Range), assessing their impact on snowmelt during the 2019 ablation season. Potential BC and moisture sources were identified through back-trajectory analysis and atmospheric reanalyses. Variations in water stable isotopes (δ1⁸O and δ2H) in the snowpack were analysed to confirm its representativeness as a climatic record for the 2018–19 accumulation season. The average BC concentration in the snow pits (12 ng g−1) generated 66 mm w.e. (or 53 mm w.e. excluding the basal zone) of meltwater. Surface snow at K2 Camp 1 showed BC concentrations of 7 ng g−1, consistent with those on the snowpack surface, suggesting it may reflect local BC levels in late February 2019. In contrast, higher concentrations at K2 Camp 2 (26 ng g−1) were potentially linked to expedition activities. |
| format | Article |
| id | doaj-art-2d2bd18807f84b3695232acdccb75f14 |
| institution | DOAJ |
| issn | 0022-1430 1727-5652 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Cambridge University Press |
| record_format | Article |
| series | Journal of Glaciology |
| spelling | doaj-art-2d2bd18807f84b3695232acdccb75f142025-08-20T02:50:59ZengCambridge University PressJournal of Glaciology0022-14301727-56522025-01-017110.1017/jog.2024.111Black carbon effects and seasonal isotope records in the Godwin-Austen snowpack and K2 high-altitude campsNicolás González-Santacruz0https://orcid.org/0000-0001-6379-319XFrancisco Fernandoy1Kumiko Goto-Azuma2https://orcid.org/0000-0003-0992-1079Motohiro Hirabayashi3Raul R. Cordero4Sarah Feron5Sérgio Henrique Faria6https://orcid.org/0000-0002-8825-7518Basque Centre for Climate Change (BC3), Leioa, SpainLaboratorio de Análisis Isotópico, Universidad Andrés Bello, Viña del Mar, ChileNational Institute of Polar Research, Tachikawa, Tokyo, JapanNational Institute of Polar Research, Tachikawa, Tokyo, JapanUniversidad de Santiago de Chile, Santiago, ChileUniversidad de Santiago de Chile, Santiago, Chile University of Groningen, Leeuwarden, The NetherlandsBasque Centre for Climate Change (BC3), Leioa, Spain IKERBASQUE, Basque Foundation for Science, Bilbao, SpainThis study investigates black carbon (BC) concentrations in the seasonal snowpack on the Godwin-Austen Glacier and in surface snow at K2 Camps 1 and 2 (Karakoram Range), assessing their impact on snowmelt during the 2019 ablation season. Potential BC and moisture sources were identified through back-trajectory analysis and atmospheric reanalyses. Variations in water stable isotopes (δ1⁸O and δ2H) in the snowpack were analysed to confirm its representativeness as a climatic record for the 2018–19 accumulation season. The average BC concentration in the snow pits (12 ng g−1) generated 66 mm w.e. (or 53 mm w.e. excluding the basal zone) of meltwater. Surface snow at K2 Camp 1 showed BC concentrations of 7 ng g−1, consistent with those on the snowpack surface, suggesting it may reflect local BC levels in late February 2019. In contrast, higher concentrations at K2 Camp 2 (26 ng g−1) were potentially linked to expedition activities.https://www.cambridge.org/core/product/identifier/S0022143024001114/type/journal_articleclimate changeenergy balancemountain glacierssnow chemistrysnow/ice surface processes |
| spellingShingle | Nicolás González-Santacruz Francisco Fernandoy Kumiko Goto-Azuma Motohiro Hirabayashi Raul R. Cordero Sarah Feron Sérgio Henrique Faria Black carbon effects and seasonal isotope records in the Godwin-Austen snowpack and K2 high-altitude camps Journal of Glaciology climate change energy balance mountain glaciers snow chemistry snow/ice surface processes |
| title | Black carbon effects and seasonal isotope records in the Godwin-Austen snowpack and K2 high-altitude camps |
| title_full | Black carbon effects and seasonal isotope records in the Godwin-Austen snowpack and K2 high-altitude camps |
| title_fullStr | Black carbon effects and seasonal isotope records in the Godwin-Austen snowpack and K2 high-altitude camps |
| title_full_unstemmed | Black carbon effects and seasonal isotope records in the Godwin-Austen snowpack and K2 high-altitude camps |
| title_short | Black carbon effects and seasonal isotope records in the Godwin-Austen snowpack and K2 high-altitude camps |
| title_sort | black carbon effects and seasonal isotope records in the godwin austen snowpack and k2 high altitude camps |
| topic | climate change energy balance mountain glaciers snow chemistry snow/ice surface processes |
| url | https://www.cambridge.org/core/product/identifier/S0022143024001114/type/journal_article |
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