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...

Full description

Bibliographic Details
Published in:Scientific Reports
Main Authors: Monteiro, Thiago, Kerr, Rodrigo, Machado, Eunice da Costa
Other Authors: 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
Language:English
Published: Springer Science and Business Media LLC 2020
Subjects:
Online Access: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
id crspringernat:10.1038/s41598-020-71814-0
record_format openpolar
spelling 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
institution Open Polar
collection Springer Nature (via Crossref)
op_collection_id 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
_version_ 1766282461067608064