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Freshwater displacement effect on the Weddell Gyre carbon budget
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dc.contributor.author | Taylor, Benjamin A. | |
dc.contributor.author | MacGilchrist, Graeme A. | |
dc.contributor.author | Mazloff, Matthew R. | |
dc.contributor.author | Talley, Lynne D. | |
dc.date.accessioned | 2023-10-03T10:30:02Z | |
dc.date.available | 2023-10-03T10:30:02Z | |
dc.date.issued | 2023-09-26 | |
dc.identifier | 294186407 | |
dc.identifier | 8be37bd5-86d0-4955-b250-0d711cd5c374 | |
dc.identifier | 85173476992 | |
dc.identifier.citation | Taylor , B A , MacGilchrist , G A , Mazloff , M R & Talley , L D 2023 , ' Freshwater displacement effect on the Weddell Gyre carbon budget ' , Geophysical Research Letters , vol. 50 , no. 18 , e2023GL103952 . https://doi.org/10.1029/2023GL103952 | en |
dc.identifier.issn | 0094-8276 | |
dc.identifier.other | RIS: urn:63E873C300E6E614475FCB345954D774 | |
dc.identifier.other | ORCID: /0000-0003-1409-8937/work/143917953 | |
dc.identifier.uri | https://hdl.handle.net/10023/28492 | |
dc.description | This work was funded by NSF's Southern Ocean Carbon and Climate Observations and Modeling (SOCCOM) Project under NSF awards PLR-1425989 and OPP-1936222. G.A.M was additionally supported under UKRI Grant MR/W013835/1. M.R.M. also acknowledges support from NASA grant 80NSSC20K1076 and NSF grants OCE-1924388 and OPP-2149501. | en |
dc.description.abstract | The Weddell Gyre mediates carbon exchange between the abyssal ocean and atmosphere, which is critical to global climate. This region also features large and highly variable freshwater fluxes due to seasonal sea ice, net precipitation, and glacial melt; however, the impact of these freshwater fluxes on the regional carbon cycle has not been fully appreciated. Using a novel budget analysis of dissolved inorganic carbon (DIC) mass in the Biogeochemical Southern Ocean State Estimate, we highlight two freshwater-driven transports. Where freshwater with minimal DIC enters the ocean, it displaces DIC-rich seawater outwards, driving a lateral transport of 75 ± 5 Tg DIC/year. Additionally, sea ice export requires a compensating import of seawater, which carries 48 ± 11 Tg DIC/year into the gyre. Though often overlooked, these freshwater displacement effects are of leading order in the Weddell Gyre carbon budget in the state estimate and in regrouped box-inversion estimates, with implications for evaluating basin-scale carbon transport. | |
dc.format.extent | 3279168 | |
dc.language.iso | eng | |
dc.relation.ispartof | Geophysical Research Letters | en |
dc.subject | Carbon budget | en |
dc.subject | Freshwater | en |
dc.subject | Weddell | en |
dc.subject | Oceanic carbon transport | en |
dc.subject | Sea ice | en |
dc.subject | Divergence | en |
dc.subject | 3rd-DAS | en |
dc.subject | SDG 13 - Climate Action | en |
dc.title | Freshwater displacement effect on the Weddell Gyre carbon budget | en |
dc.type | Journal article | en |
dc.contributor.sponsor | Medical Research Council | en |
dc.contributor.institution | University of St Andrews. School of Earth & Environmental Sciences | en |
dc.identifier.doi | https://doi.org/10.1029/2023GL103952 | |
dc.description.status | Peer reviewed | en |
dc.identifier.grantnumber | MR/W013835/1 | en |
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