Seasonal variability of net sea-air CO(2) fluxes in a coastal region of the northern Antarctic Peninsula
We show an annual overview of the sea-air CO(2) exchanges and primary drivers in the Gerlache Strait, a hotspot for climate change that is ecologically important in the northern Antarctic Peninsula. In autumn and winter, episodic upwelling events increase the remineralized carbon in the sea surface,...
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ftpubmed:oai:pubmedcentral.nih.gov:7483740 2023-05-15T13:52:06+02:00 Seasonal variability of net sea-air CO(2) fluxes in a coastal region of the northern Antarctic Peninsula Monteiro, Thiago Kerr, Rodrigo Machado, Eunice da Costa 2020-09-10 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7483740/ https://doi.org/10.1038/s41598-020-71814-0 en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7483740/ http://dx.doi.org/10.1038/s41598-020-71814-0 © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. CC-BY Sci Rep Article Text 2020 ftpubmed https://doi.org/10.1038/s41598-020-71814-0 2020-09-20T00:33:26Z We show an annual overview of the sea-air CO(2) exchanges and primary drivers in the Gerlache Strait, a hotspot for climate change that is ecologically important in the northern Antarctic Peninsula. In autumn and winter, episodic upwelling events increase the remineralized carbon in the sea surface, leading the region to act as a moderate or strong CO(2) source to the atmosphere of up to 40 mmol m(–2) day(–1). During summer and late spring, photosynthesis decreases the CO(2) partial pressure in the surface seawater, enhancing ocean CO(2) uptake, which reaches values higher than − 40 mmol m(–2) day(–1). Thus, autumn/winter CO(2) outgassing is nearly balanced by an only 4-month period of intense ocean CO(2) ingassing during summer/spring. Hence, the estimated annual net sea-air CO(2) flux from 2002 to 2017 was 1.24 ± 4.33 mmol m(–2) day(–1), opposing the common CO(2) sink behaviour observed in other coastal regions around Antarctica. The main drivers of changes in the surface CO(2) system in this region were total dissolved inorganic carbon and total alkalinity, revealing dominant influences of both physical and biological processes. These findings demonstrate the importance of Antarctica coastal zones as summer carbon sinks and emphasize the need to better understand local/regional seasonal sensitivity to the net CO(2) flux effect on the Southern Ocean carbon cycle, especially considering the impacts caused by climate change. Text Antarc* Antarctic Antarctic Peninsula Antarctica Southern Ocean PubMed Central (PMC) Antarctic Antarctic Peninsula Gerlache ENVELOPE(99.033,99.033,-66.500,-66.500) Gerlache Strait ENVELOPE(-62.333,-62.333,-64.500,-64.500) Southern Ocean Scientific Reports 10 1 |
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Article Monteiro, Thiago Kerr, Rodrigo Machado, Eunice da Costa Seasonal variability of net sea-air CO(2) fluxes in a coastal region of the northern Antarctic Peninsula |
topic_facet |
Article |
description |
We show an annual overview of the sea-air CO(2) exchanges and primary drivers in the Gerlache Strait, a hotspot for climate change that is ecologically important in the northern Antarctic Peninsula. In autumn and winter, episodic upwelling events increase the remineralized carbon in the sea surface, leading the region to act as a moderate or strong CO(2) source to the atmosphere of up to 40 mmol m(–2) day(–1). During summer and late spring, photosynthesis decreases the CO(2) partial pressure in the surface seawater, enhancing ocean CO(2) uptake, which reaches values higher than − 40 mmol m(–2) day(–1). Thus, autumn/winter CO(2) outgassing is nearly balanced by an only 4-month period of intense ocean CO(2) ingassing during summer/spring. Hence, the estimated annual net sea-air CO(2) flux from 2002 to 2017 was 1.24 ± 4.33 mmol m(–2) day(–1), opposing the common CO(2) sink behaviour observed in other coastal regions around Antarctica. The main drivers of changes in the surface CO(2) system in this region were total dissolved inorganic carbon and total alkalinity, revealing dominant influences of both physical and biological processes. These findings demonstrate the importance of Antarctica coastal zones as summer carbon sinks and emphasize the need to better understand local/regional seasonal sensitivity to the net CO(2) flux effect on the Southern Ocean carbon cycle, especially considering the impacts caused by climate change. |
format |
Text |
author |
Monteiro, Thiago Kerr, Rodrigo Machado, Eunice da Costa |
author_facet |
Monteiro, Thiago Kerr, Rodrigo Machado, Eunice da Costa |
author_sort |
Monteiro, Thiago |
title |
Seasonal variability of net sea-air CO(2) fluxes in a coastal region of the northern Antarctic Peninsula |
title_short |
Seasonal variability of net sea-air CO(2) fluxes in a coastal region of the northern Antarctic Peninsula |
title_full |
Seasonal variability of net sea-air CO(2) fluxes in a coastal region of the northern Antarctic Peninsula |
title_fullStr |
Seasonal variability of net sea-air CO(2) fluxes in a coastal region of the northern Antarctic Peninsula |
title_full_unstemmed |
Seasonal variability of net sea-air CO(2) fluxes in a coastal region of the northern Antarctic Peninsula |
title_sort |
seasonal variability of net sea-air co(2) fluxes in a coastal region of the northern antarctic peninsula |
publisher |
Nature Publishing Group UK |
publishDate |
2020 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7483740/ https://doi.org/10.1038/s41598-020-71814-0 |
long_lat |
ENVELOPE(99.033,99.033,-66.500,-66.500) ENVELOPE(-62.333,-62.333,-64.500,-64.500) |
geographic |
Antarctic Antarctic Peninsula Gerlache Gerlache Strait Southern Ocean |
geographic_facet |
Antarctic Antarctic Peninsula Gerlache Gerlache Strait Southern Ocean |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Southern Ocean |
op_source |
Sci Rep |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7483740/ http://dx.doi.org/10.1038/s41598-020-71814-0 |
op_rights |
© The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41598-020-71814-0 |
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Scientific Reports |
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10 |
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