Sea-air CO2 fluxes along the Brazilian continental margin
Measurements of the marine carbonate system on tropical and subtropical continental margins are poorly distributed in space and time, with many uncertainties persisting regarding the role of carbon exchanges at the ocean-atmosphere interface in these areas. To calculate sea-to-air CO2 fluxes in Ma...
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| Format: | Article |
| Language: | English |
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Instituto Oceanográfico da Universidade de São Paulo
2024-04-01
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| Series: | Ocean and Coastal Research |
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| Online Access: | https://journals.usp.br/ocr/article/view/222889 |
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| author | Helen Michelle de Jesus Affe Diogo Souza Bezerra Rocha Fernanda Reinhardt Piedras Gleyci Aparecida Oliveira Moser Moacyr Cunha de Araujo Filho Leticia Cotrim da Cunha |
| author_facet | Helen Michelle de Jesus Affe Diogo Souza Bezerra Rocha Fernanda Reinhardt Piedras Gleyci Aparecida Oliveira Moser Moacyr Cunha de Araujo Filho Leticia Cotrim da Cunha |
| author_sort | Helen Michelle de Jesus Affe |
| collection | DOAJ |
| description |
Measurements of the marine carbonate system on tropical and subtropical continental margins are poorly
distributed in space and time, with many uncertainties persisting regarding the role of carbon exchanges at the
ocean-atmosphere interface in these areas. To calculate sea-to-air CO2
fluxes in Marine Ecoregions along the
Brazilian continental margin (4°N to 34°S), we used data from the Surface Ocean CO2
Atlas (SOCAT v2020),
collected up to 400 km from the coast, at the surface (5 m), between 1991 and 2018, with the aim of investigating
the role of ecoregions as potential sinks or sources of atmospheric CO2
. The temperature and salinity of seawater
presented variability in the north-south direction mainly because of the broad latitudinal range, reflecting typical
patterns of tropical (T = 27.4°C ±1.49; S = 36.4 ±1.91) and subtropical waters (T = 22.8°C ±3.41; S = 35 ±2.91), in
addition to the greater or lesser influence of river inputs in each ecoregion. The pCO2
values in the surface waters
varied from 121.81 (Amazon) to 478.92 µatm (Eastern), differing significantly between ecoregions and showing
an expected decadal increasing trend, both in the atmosphere and in the seawater. The calculated values of CO2
fluxes showed non-homogeneous spatio-temporal variations, from -24.37 mmol m-2 d-1 (Rio Grande) to 9.87 mmol
m- 2 d-1 (Southeastern). Throughout the analyzed time series, we observed that the Northeast, Amazon and Eastern
ecoregions acted predominantly as sources of CO2
and the Southeastern ecoregions and, mainly, Rio Grande,
acted predominantly as sinks of atmospheric CO2
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| format | Article |
| id | doaj-art-275fcce640b4455398ae8233dd7d7a05 |
| institution | OA Journals |
| issn | 2675-2824 |
| language | English |
| publishDate | 2024-04-01 |
| publisher | Instituto Oceanográfico da Universidade de São Paulo |
| record_format | Article |
| series | Ocean and Coastal Research |
| spelling | doaj-art-275fcce640b4455398ae8233dd7d7a052025-08-20T02:20:13ZengInstituto Oceanográfico da Universidade de São PauloOcean and Coastal Research2675-28242024-04-0171Suppl. 210.1590/2675-2824071.22051hmdjaSea-air CO2 fluxes along the Brazilian continental marginHelen Michelle de Jesus AffeDiogo Souza Bezerra RochaFernanda Reinhardt PiedrasGleyci Aparecida Oliveira MoserMoacyr Cunha de Araujo FilhoLeticia Cotrim da Cunha Measurements of the marine carbonate system on tropical and subtropical continental margins are poorly distributed in space and time, with many uncertainties persisting regarding the role of carbon exchanges at the ocean-atmosphere interface in these areas. To calculate sea-to-air CO2 fluxes in Marine Ecoregions along the Brazilian continental margin (4°N to 34°S), we used data from the Surface Ocean CO2 Atlas (SOCAT v2020), collected up to 400 km from the coast, at the surface (5 m), between 1991 and 2018, with the aim of investigating the role of ecoregions as potential sinks or sources of atmospheric CO2 . The temperature and salinity of seawater presented variability in the north-south direction mainly because of the broad latitudinal range, reflecting typical patterns of tropical (T = 27.4°C ±1.49; S = 36.4 ±1.91) and subtropical waters (T = 22.8°C ±3.41; S = 35 ±2.91), in addition to the greater or lesser influence of river inputs in each ecoregion. The pCO2 values in the surface waters varied from 121.81 (Amazon) to 478.92 µatm (Eastern), differing significantly between ecoregions and showing an expected decadal increasing trend, both in the atmosphere and in the seawater. The calculated values of CO2 fluxes showed non-homogeneous spatio-temporal variations, from -24.37 mmol m-2 d-1 (Rio Grande) to 9.87 mmol m- 2 d-1 (Southeastern). Throughout the analyzed time series, we observed that the Northeast, Amazon and Eastern ecoregions acted predominantly as sources of CO2 and the Southeastern ecoregions and, mainly, Rio Grande, acted predominantly as sinks of atmospheric CO2 https://journals.usp.br/ocr/article/view/222889Atlantic OceanBlue AmazonCarbonate systemCO2 source or sinkBrazilian marine ecoregions. |
| spellingShingle | Helen Michelle de Jesus Affe Diogo Souza Bezerra Rocha Fernanda Reinhardt Piedras Gleyci Aparecida Oliveira Moser Moacyr Cunha de Araujo Filho Leticia Cotrim da Cunha Sea-air CO2 fluxes along the Brazilian continental margin Ocean and Coastal Research Atlantic Ocean Blue Amazon Carbonate system CO2 source or sink Brazilian marine ecoregions. |
| title | Sea-air CO2 fluxes along the Brazilian continental margin |
| title_full | Sea-air CO2 fluxes along the Brazilian continental margin |
| title_fullStr | Sea-air CO2 fluxes along the Brazilian continental margin |
| title_full_unstemmed | Sea-air CO2 fluxes along the Brazilian continental margin |
| title_short | Sea-air CO2 fluxes along the Brazilian continental margin |
| title_sort | sea air co2 fluxes along the brazilian continental margin |
| topic | Atlantic Ocean Blue Amazon Carbonate system CO2 source or sink Brazilian marine ecoregions. |
| url | https://journals.usp.br/ocr/article/view/222889 |
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