Blue carbon gains from glacial retreat along Antarctic fjords: What should we expect?
Abstract Rising atmospheric CO 2 is intensifying climate change but it is also driving global and particularly polar greening. However, most blue carbon sinks (that held by marine organisms) are shrinking, which is important as these are hotspots of genuine carbon sequestration. Polar blue carbon in...
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crwiley:10.1111/gcb.15055 2024-09-15T17:41:33+00:00 Blue carbon gains from glacial retreat along Antarctic fjords: What should we expect? Barnes, David K. A. Sands, Chester J. Cook, Alison Howard, Floyd Roman Gonzalez, Alejandro Muñoz–Ramirez, Carlos Retallick, Kate Scourse, James Van Landeghem, Katrien Zwerschke, Nadescha Natural Environment Research Council Fondo Nacional de Desarrollo Científico y Tecnológico 2020 http://dx.doi.org/10.1111/gcb.15055 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fgcb.15055 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.15055 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/gcb.15055 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Global Change Biology volume 26, issue 5, page 2750-2755 ISSN 1354-1013 1365-2486 journal-article 2020 crwiley https://doi.org/10.1111/gcb.15055 2024-08-27T04:32:27Z Abstract Rising atmospheric CO 2 is intensifying climate change but it is also driving global and particularly polar greening. However, most blue carbon sinks (that held by marine organisms) are shrinking, which is important as these are hotspots of genuine carbon sequestration. Polar blue carbon increases with losses of marine ice over high latitude continental shelf areas. Marine ice (sea ice, ice shelf and glacier retreat) losses generate a valuable negative feedback on climate change. Blue carbon change with sea ice and ice shelf losses has been estimated, but not how blue carbon responds to glacier retreat along fjords. We derive a testable estimate of glacier retreat driven blue carbon gains by investigating three fjords in the West Antarctic Peninsula (WAP). We started by multiplying ~40 year mean glacier retreat rates by the number of retreating WAP fjords and their time of exposure. We multiplied this area by regional zoobenthic carbon means from existing datasets to suggest that WAP fjords generate 3,130 tonnes of new zoobenthic carbon per year (t zC/year) and sequester >780 t zC/year. We tested this by capture and analysis of 204 high resolution seabed images along emerging WAP fjords. Biota within these images were identified to density per 13 functional groups. Mean stored carbon per individual was assigned from literature values to give a stored zoobenthic Carbon per area, which was multiplied up by area of fjord exposed over time, which increased the estimate to 4,536 t zC/year. The purpose of this study was to establish a testable estimate of blue carbon change caused by glacier retreat along Antarctic fjords and thus to establish its relative importance compared to polar and other carbon sinks. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Ice Shelf Sea ice Wiley Online Library Global Change Biology 26 5 2750 2755 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Rising atmospheric CO 2 is intensifying climate change but it is also driving global and particularly polar greening. However, most blue carbon sinks (that held by marine organisms) are shrinking, which is important as these are hotspots of genuine carbon sequestration. Polar blue carbon increases with losses of marine ice over high latitude continental shelf areas. Marine ice (sea ice, ice shelf and glacier retreat) losses generate a valuable negative feedback on climate change. Blue carbon change with sea ice and ice shelf losses has been estimated, but not how blue carbon responds to glacier retreat along fjords. We derive a testable estimate of glacier retreat driven blue carbon gains by investigating three fjords in the West Antarctic Peninsula (WAP). We started by multiplying ~40 year mean glacier retreat rates by the number of retreating WAP fjords and their time of exposure. We multiplied this area by regional zoobenthic carbon means from existing datasets to suggest that WAP fjords generate 3,130 tonnes of new zoobenthic carbon per year (t zC/year) and sequester >780 t zC/year. We tested this by capture and analysis of 204 high resolution seabed images along emerging WAP fjords. Biota within these images were identified to density per 13 functional groups. Mean stored carbon per individual was assigned from literature values to give a stored zoobenthic Carbon per area, which was multiplied up by area of fjord exposed over time, which increased the estimate to 4,536 t zC/year. The purpose of this study was to establish a testable estimate of blue carbon change caused by glacier retreat along Antarctic fjords and thus to establish its relative importance compared to polar and other carbon sinks. |
author2 |
Natural Environment Research Council Fondo Nacional de Desarrollo Científico y Tecnológico |
format |
Article in Journal/Newspaper |
author |
Barnes, David K. A. Sands, Chester J. Cook, Alison Howard, Floyd Roman Gonzalez, Alejandro Muñoz–Ramirez, Carlos Retallick, Kate Scourse, James Van Landeghem, Katrien Zwerschke, Nadescha |
spellingShingle |
Barnes, David K. A. Sands, Chester J. Cook, Alison Howard, Floyd Roman Gonzalez, Alejandro Muñoz–Ramirez, Carlos Retallick, Kate Scourse, James Van Landeghem, Katrien Zwerschke, Nadescha Blue carbon gains from glacial retreat along Antarctic fjords: What should we expect? |
author_facet |
Barnes, David K. A. Sands, Chester J. Cook, Alison Howard, Floyd Roman Gonzalez, Alejandro Muñoz–Ramirez, Carlos Retallick, Kate Scourse, James Van Landeghem, Katrien Zwerschke, Nadescha |
author_sort |
Barnes, David K. A. |
title |
Blue carbon gains from glacial retreat along Antarctic fjords: What should we expect? |
title_short |
Blue carbon gains from glacial retreat along Antarctic fjords: What should we expect? |
title_full |
Blue carbon gains from glacial retreat along Antarctic fjords: What should we expect? |
title_fullStr |
Blue carbon gains from glacial retreat along Antarctic fjords: What should we expect? |
title_full_unstemmed |
Blue carbon gains from glacial retreat along Antarctic fjords: What should we expect? |
title_sort |
blue carbon gains from glacial retreat along antarctic fjords: what should we expect? |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1111/gcb.15055 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fgcb.15055 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.15055 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/gcb.15055 |
genre |
Antarc* Antarctic Antarctic Peninsula Ice Shelf Sea ice |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Ice Shelf Sea ice |
op_source |
Global Change Biology volume 26, issue 5, page 2750-2755 ISSN 1354-1013 1365-2486 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/gcb.15055 |
container_title |
Global Change Biology |
container_volume |
26 |
container_issue |
5 |
container_start_page |
2750 |
op_container_end_page |
2755 |
_version_ |
1810487779483713536 |