Seasonal variability of net sea-air CO2 fluxes in a coastal region of the northern Antarctic Peninsula
Abstract 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...
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crspringernat:10.1038/s41598-020-71814-0 2023-05-15T14:10:24+02:00 Seasonal variability of net sea-air CO2 fluxes in a coastal region of the northern Antarctic Peninsula Monteiro, Thiago Kerr, Rodrigo Machado, Eunice da Costa Conselho Nacional de Desenvolvimento Científico e Tecnológico Coordenação de Aperfeiçoamento de Pessoal de Nível Superior Brazilian National Institute of Science and Technology of Cryosphere FAPERGS 2020 http://dx.doi.org/10.1038/s41598-020-71814-0 https://www.nature.com/articles/s41598-020-71814-0.pdf https://www.nature.com/articles/s41598-020-71814-0 en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Scientific Reports volume 10, issue 1 ISSN 2045-2322 Multidisciplinary journal-article 2020 crspringernat https://doi.org/10.1038/s41598-020-71814-0 2022-01-04T15:18:09Z Abstract 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. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Southern Ocean Springer Nature (via Crossref) 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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Springer Nature (via Crossref) |
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crspringernat |
language |
English |
topic |
Multidisciplinary |
spellingShingle |
Multidisciplinary Monteiro, Thiago Kerr, Rodrigo Machado, Eunice da Costa Seasonal variability of net sea-air CO2 fluxes in a coastal region of the northern Antarctic Peninsula |
topic_facet |
Multidisciplinary |
description |
Abstract 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. |
author2 |
Conselho Nacional de Desenvolvimento Científico e Tecnológico Coordenação de Aperfeiçoamento de Pessoal de Nível Superior Brazilian National Institute of Science and Technology of Cryosphere FAPERGS |
format |
Article in Journal/Newspaper |
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 CO2 fluxes in a coastal region of the northern Antarctic Peninsula |
title_short |
Seasonal variability of net sea-air CO2 fluxes in a coastal region of the northern Antarctic Peninsula |
title_full |
Seasonal variability of net sea-air CO2 fluxes in a coastal region of the northern Antarctic Peninsula |
title_fullStr |
Seasonal variability of net sea-air CO2 fluxes in a coastal region of the northern Antarctic Peninsula |
title_full_unstemmed |
Seasonal variability of net sea-air CO2 fluxes in a coastal region of the northern Antarctic Peninsula |
title_sort |
seasonal variability of net sea-air co2 fluxes in a coastal region of the northern antarctic peninsula |
publisher |
Springer Science and Business Media LLC |
publishDate |
2020 |
url |
http://dx.doi.org/10.1038/s41598-020-71814-0 https://www.nature.com/articles/s41598-020-71814-0.pdf https://www.nature.com/articles/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 |
Scientific Reports volume 10, issue 1 ISSN 2045-2322 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41598-020-71814-0 |
container_title |
Scientific Reports |
container_volume |
10 |
container_issue |
1 |
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1766282461067608064 |