Academic Journal
The Changing Biological Carbon Pump of the South Atlantic Ocean
| العنوان: | The Changing Biological Carbon Pump of the South Atlantic Ocean |
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| المؤلفون: | Delaigue, L., Sulpis, O., Reichart, G.‐j., Humphreys, M. |
| المساهمون: | Royal Netherlands Institute for Sea Research (NIOZ), Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement (CEREGE), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Universiteit Utrecht / Utrecht University Utrecht |
| المصدر: | ISSN: 0886-6236. |
| بيانات النشر: | CCSD American Geophysical Union |
| سنة النشر: | 2024 |
| المجموعة: | Institut National de la Recherche Agronomique: ProdINRA |
| مصطلحات موضوعية: | anthropogenic CO2, biological carbon pump intensification, south subtropical convergence, [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
| الوصف: | International audience ; Abstract Global marine anthropogenic CO 2 inventories have traditionally emphasized the North Atlantic's role in the carbon cycle, while Southern hemisphere processes are less understood. The South Subtropical Convergence (SSTC) in the South Atlantic, a juncture of distinct nutrient‐rich waters, offers a valuable study area for discerning the potential impacts of climate change on the ocean's biological carbon pump (C soft ). Using discrete observations from GLODAPv2.2022 and BGC‐Argo at 40°S in the Atlantic Ocean from 1972 to 2023, an increase in dissolved inorganic carbon (DIC) of +1.44 ± 0.11 μmol kg −1 yr −1 in surface waters was observed. While anthropogenic CO 2 played a role, variations in the contribution of C soft were observed. Discrepancies emerged in assessing C soft based on the tracers employed: when using AOU, C soft(AOU) recorded an increase of +0.20 ± 0.03 μmol kg −1 yr −1 , while using nitrate as the reference, C soft(NO3) displayed an increase of +0.85 ± 0.07 μmol kg −1 yr −1 . Key processes such as water mass composition shifts, changes in oxygenation, remineralization in the Southern Ocean, and the challenges they pose in accurately representing the evolving C soft are discussed. These findings highlight that while global studies primarily attribute DIC increase to anthropogenic CO 2 , observations at 40°S reveal an intensified biological carbon pump, showing that regional DIC changes are more complex than previously thought and emphasizing the need for better parameterizations to compute the BCP in the marine carbon budget. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| ردمك: | 978-0-01-310360-8 0-01-310360-1 |
| Relation: | WOS: 001310360100001 |
| DOI: | 10.1029/2024GB008202 |
| الاتاحة: | https://hal.science/hal-04714587 https://hal.science/hal-04714587v1/document https://hal.science/hal-04714587v1/file/Global%20Biogeochemical%20Cycles%20-%202024%20-%20Delaigue%20-%20The%20Changing%20Biological%20Carbon%20Pump%20of%20the%20South%20Atlantic%20Ocean.pdf https://doi.org/10.1029/2024GB008202 |
| Rights: | http://creativecommons.org/licenses/by/ ; info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.69D8C70A |
| قاعدة البيانات: | BASE |
| ردمك: | 9780013103608 0013103601 |
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| DOI: | 10.1029/2024GB008202 |