Drivers and fluxes of dissolved organic carbon along the northern Antarctic Peninsula during late summer
Abstract Dissolved organic carbon (DOC) is a key component of the biogeochemical carbon cycle in the Southern Ocean. However, there are still significant gaps in understanding the role of DOC in polar environments, due to the limitations of spatiotemporal sampling. In this study, we investigated the...
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Academia Brasileira de Ciências
2024-12-01
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| Series: | Anais da Academia Brasileira de Ciências |
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| author | RAQUEL AVELINA LETICIA C. DA CUNHA RODRIGO KERR CÁSSIA O. FARIAS CLAUDIA HAMACHER MAURICIO M. MATA |
| author_facet | RAQUEL AVELINA LETICIA C. DA CUNHA RODRIGO KERR CÁSSIA O. FARIAS CLAUDIA HAMACHER MAURICIO M. MATA |
| author_sort | RAQUEL AVELINA |
| collection | DOAJ |
| description | Abstract Dissolved organic carbon (DOC) is a key component of the biogeochemical carbon cycle in the Southern Ocean. However, there are still significant gaps in understanding the role of DOC in polar environments, due to the limitations of spatiotemporal sampling. In this study, we investigated the regional aspects controlling the distribution and diffusive and advective fluxes of DOC along the northern Antarctic Peninsula (NAP) during austral late summers of 1995 and between 2015 and 2019. DOC concentrations ranged from 33.1 to 157.6 μmol kg-1. The NAP showed regional differences in both its hydrographic conditions and DOC distribution. The regional variability reflected the main biogeochemical sources and fates of DOC associated with the Antarctic Circumpolar Current inflows, the Weddell Gyre transport and the meltwater input. The intensity of the advective fluxes of DOC was 106 times greater than the diffusive fluxes. However, ocean fronts along NAP environments are mesoscale structures for observations of downward and upward diffusive fluxes of DOC. This study adds insights on the role of DOC as a proxy for a better understanding of the coupling between physical and biogeochemical processes over time in an environment sensitive to climate change. |
| format | Article |
| id | doaj-art-ca9aa7f7f7ff4dccb308f52508338828 |
| institution | OA Journals |
| issn | 1678-2690 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Academia Brasileira de Ciências |
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| series | Anais da Academia Brasileira de Ciências |
| spelling | doaj-art-ca9aa7f7f7ff4dccb308f525083388282025-08-20T02:36:52ZengAcademia Brasileira de CiênciasAnais da Academia Brasileira de Ciências1678-26902024-12-0196suppl 210.1590/0001-3765202420240573Drivers and fluxes of dissolved organic carbon along the northern Antarctic Peninsula during late summerRAQUEL AVELINAhttps://orcid.org/0000-0002-8283-2104LETICIA C. DA CUNHAhttps://orcid.org/0000-0001-8035-1430RODRIGO KERRhttps://orcid.org/0000-0002-2632-3137CÁSSIA O. FARIAShttps://orcid.org/0000-0003-4578-0883CLAUDIA HAMACHERhttps://orcid.org/0000-0002-4807-3247MAURICIO M. MATAhttps://orcid.org/0000-0002-9028-8284Abstract Dissolved organic carbon (DOC) is a key component of the biogeochemical carbon cycle in the Southern Ocean. However, there are still significant gaps in understanding the role of DOC in polar environments, due to the limitations of spatiotemporal sampling. In this study, we investigated the regional aspects controlling the distribution and diffusive and advective fluxes of DOC along the northern Antarctic Peninsula (NAP) during austral late summers of 1995 and between 2015 and 2019. DOC concentrations ranged from 33.1 to 157.6 μmol kg-1. The NAP showed regional differences in both its hydrographic conditions and DOC distribution. The regional variability reflected the main biogeochemical sources and fates of DOC associated with the Antarctic Circumpolar Current inflows, the Weddell Gyre transport and the meltwater input. The intensity of the advective fluxes of DOC was 106 times greater than the diffusive fluxes. However, ocean fronts along NAP environments are mesoscale structures for observations of downward and upward diffusive fluxes of DOC. This study adds insights on the role of DOC as a proxy for a better understanding of the coupling between physical and biogeochemical processes over time in an environment sensitive to climate change.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652024000401110&lng=en&tlng=enbiological pumpcarbon cyclediffusive fluxesadvective fluxesorganic matterSouthern Ocean |
| spellingShingle | RAQUEL AVELINA LETICIA C. DA CUNHA RODRIGO KERR CÁSSIA O. FARIAS CLAUDIA HAMACHER MAURICIO M. MATA Drivers and fluxes of dissolved organic carbon along the northern Antarctic Peninsula during late summer Anais da Academia Brasileira de Ciências biological pump carbon cycle diffusive fluxes advective fluxes organic matter Southern Ocean |
| title | Drivers and fluxes of dissolved organic carbon along the northern Antarctic Peninsula during late summer |
| title_full | Drivers and fluxes of dissolved organic carbon along the northern Antarctic Peninsula during late summer |
| title_fullStr | Drivers and fluxes of dissolved organic carbon along the northern Antarctic Peninsula during late summer |
| title_full_unstemmed | Drivers and fluxes of dissolved organic carbon along the northern Antarctic Peninsula during late summer |
| title_short | Drivers and fluxes of dissolved organic carbon along the northern Antarctic Peninsula during late summer |
| title_sort | drivers and fluxes of dissolved organic carbon along the northern antarctic peninsula during late summer |
| topic | biological pump carbon cycle diffusive fluxes advective fluxes organic matter Southern Ocean |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652024000401110&lng=en&tlng=en |
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