Assessment of austral autumn air–sea CO2 exchange in the Pacific sector of the Southern Ocean and dominant controlling factors
The factors that control the partial pressure of carbon dioxide (pCO2) in the Pacific sector of the Southern Ocean were investigated in April 2018, onboard the icebreaker, ARAON. The mean (± 1σ) of the sea surface pCO2 was estimated to be 431 ± 6 μatm in the north of the Ross Sea (NRS), 403 ± 18 μat...
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2023
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Online Access: | https://doi.org/10.3389/fmars.2023.1192959 https://doaj.org/article/30c0c6c3f07b47e1a3f11d0e112426b2 |
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ftdoajarticles:oai:doaj.org/article:30c0c6c3f07b47e1a3f11d0e112426b2 2023-06-11T04:06:51+02:00 Assessment of austral autumn air–sea CO2 exchange in the Pacific sector of the Southern Ocean and dominant controlling factors Ahra Mo Keyhong Park Jisoo Park Doshik Hahm Kitae Kim Young Ho Ko José Luis Iriarte Jung-Ok Choi Tae-Wook Kim 2023-05-01T00:00:00Z https://doi.org/10.3389/fmars.2023.1192959 https://doaj.org/article/30c0c6c3f07b47e1a3f11d0e112426b2 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmars.2023.1192959/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2023.1192959 https://doaj.org/article/30c0c6c3f07b47e1a3f11d0e112426b2 Frontiers in Marine Science, Vol 10 (2023) Southern Ocean surface CO2 partial pressure (pCO2) carbon cycle air-sea CO2 flux western Antarctic Peninsula Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2023 ftdoajarticles https://doi.org/10.3389/fmars.2023.1192959 2023-05-28T00:36:45Z The factors that control the partial pressure of carbon dioxide (pCO2) in the Pacific sector of the Southern Ocean were investigated in April 2018, onboard the icebreaker, ARAON. The mean (± 1σ) of the sea surface pCO2 was estimated to be 431 ± 6 μatm in the north of the Ross Sea (NRS), 403 ± 18 μatm in the Amundsen–Bellingshausen Sea (ABS), and 426 ± 16 μatm in the western Antarctic Peninsula and Weddell Sea (WAP/WS). The controlling factors for pCO2 in the NRS appeared to be meridionally different based on the southern boundary of the Antarctic Circumpolar Current (SB; ~62.5°S in the Ross Sea). The sea surface pCO2 exhibited a strong correlation with salinity and the difference between the O2/Ar (ΔO2/Ar) values of the sample and air-saturated water in the north and south of the SB, respectively. The pCO2 in the ABS and western WAP/WS displayed a strong correlation with salinity. Furthermore, ΔO2/Ar and sea ice formation appear to be the dominant factors that control pCO2 in the Confluence Zone (CZ) and northern parts of WAP/WS. The estimated air–sea CO2 fluxes (positive and negative values indicate the source and sink for atmospheric CO2, respectively) range from 3.1 to 18.8 mmol m−2 d−1 in the NRS, −12.7 to 17.3 mmol m−2 d−1 in the ABS, and −59.4 to 140.8 mmol m−2 d−1 in the WAP/WS. In addition, biology-driven large variations in the air–sea CO2 flux were observed in the CZ. Our results are the most recent observation data acquired in austral autumn in the Southern Ocean. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Bellingshausen Sea Ross Sea Sea ice Southern Ocean Weddell Sea Directory of Open Access Journals: DOAJ Articles Antarctic Antarctic Peninsula Austral Bellingshausen Sea Pacific Ross Sea Southern Ocean The Antarctic Weddell Weddell Sea Frontiers in Marine Science 10 |
institution |
Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Southern Ocean surface CO2 partial pressure (pCO2) carbon cycle air-sea CO2 flux western Antarctic Peninsula Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
Southern Ocean surface CO2 partial pressure (pCO2) carbon cycle air-sea CO2 flux western Antarctic Peninsula Science Q General. Including nature conservation geographical distribution QH1-199.5 Ahra Mo Keyhong Park Jisoo Park Doshik Hahm Kitae Kim Young Ho Ko José Luis Iriarte Jung-Ok Choi Tae-Wook Kim Assessment of austral autumn air–sea CO2 exchange in the Pacific sector of the Southern Ocean and dominant controlling factors |
topic_facet |
Southern Ocean surface CO2 partial pressure (pCO2) carbon cycle air-sea CO2 flux western Antarctic Peninsula Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
The factors that control the partial pressure of carbon dioxide (pCO2) in the Pacific sector of the Southern Ocean were investigated in April 2018, onboard the icebreaker, ARAON. The mean (± 1σ) of the sea surface pCO2 was estimated to be 431 ± 6 μatm in the north of the Ross Sea (NRS), 403 ± 18 μatm in the Amundsen–Bellingshausen Sea (ABS), and 426 ± 16 μatm in the western Antarctic Peninsula and Weddell Sea (WAP/WS). The controlling factors for pCO2 in the NRS appeared to be meridionally different based on the southern boundary of the Antarctic Circumpolar Current (SB; ~62.5°S in the Ross Sea). The sea surface pCO2 exhibited a strong correlation with salinity and the difference between the O2/Ar (ΔO2/Ar) values of the sample and air-saturated water in the north and south of the SB, respectively. The pCO2 in the ABS and western WAP/WS displayed a strong correlation with salinity. Furthermore, ΔO2/Ar and sea ice formation appear to be the dominant factors that control pCO2 in the Confluence Zone (CZ) and northern parts of WAP/WS. The estimated air–sea CO2 fluxes (positive and negative values indicate the source and sink for atmospheric CO2, respectively) range from 3.1 to 18.8 mmol m−2 d−1 in the NRS, −12.7 to 17.3 mmol m−2 d−1 in the ABS, and −59.4 to 140.8 mmol m−2 d−1 in the WAP/WS. In addition, biology-driven large variations in the air–sea CO2 flux were observed in the CZ. Our results are the most recent observation data acquired in austral autumn in the Southern Ocean. |
format |
Article in Journal/Newspaper |
author |
Ahra Mo Keyhong Park Jisoo Park Doshik Hahm Kitae Kim Young Ho Ko José Luis Iriarte Jung-Ok Choi Tae-Wook Kim |
author_facet |
Ahra Mo Keyhong Park Jisoo Park Doshik Hahm Kitae Kim Young Ho Ko José Luis Iriarte Jung-Ok Choi Tae-Wook Kim |
author_sort |
Ahra Mo |
title |
Assessment of austral autumn air–sea CO2 exchange in the Pacific sector of the Southern Ocean and dominant controlling factors |
title_short |
Assessment of austral autumn air–sea CO2 exchange in the Pacific sector of the Southern Ocean and dominant controlling factors |
title_full |
Assessment of austral autumn air–sea CO2 exchange in the Pacific sector of the Southern Ocean and dominant controlling factors |
title_fullStr |
Assessment of austral autumn air–sea CO2 exchange in the Pacific sector of the Southern Ocean and dominant controlling factors |
title_full_unstemmed |
Assessment of austral autumn air–sea CO2 exchange in the Pacific sector of the Southern Ocean and dominant controlling factors |
title_sort |
assessment of austral autumn air–sea co2 exchange in the pacific sector of the southern ocean and dominant controlling factors |
publisher |
Frontiers Media S.A. |
publishDate |
2023 |
url |
https://doi.org/10.3389/fmars.2023.1192959 https://doaj.org/article/30c0c6c3f07b47e1a3f11d0e112426b2 |
geographic |
Antarctic Antarctic Peninsula Austral Bellingshausen Sea Pacific Ross Sea Southern Ocean The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Antarctic Peninsula Austral Bellingshausen Sea Pacific Ross Sea Southern Ocean The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctic Peninsula Bellingshausen Sea Ross Sea Sea ice Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Bellingshausen Sea Ross Sea Sea ice Southern Ocean Weddell Sea |
op_source |
Frontiers in Marine Science, Vol 10 (2023) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fmars.2023.1192959/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2023.1192959 https://doaj.org/article/30c0c6c3f07b47e1a3f11d0e112426b2 |
op_doi |
https://doi.org/10.3389/fmars.2023.1192959 |
container_title |
Frontiers in Marine Science |
container_volume |
10 |
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1768379041175306240 |