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Authigenic mineral phases as a driver of the upper-ocean iron cycle.

التفاصيل البيبلوغرافية
العنوان: Authigenic mineral phases as a driver of the upper-ocean iron cycle.
المؤلفون: Tagliabue A; School of Environmental Sciences, University of Liverpool, Liverpool, UK. a.tagliabue@liverpool.ac.uk., Buck KN; College of Marine Science, University of South Florida, St. Petersburg, FL, USA.; College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR, USA., Sofen LE; Bigelow Laboratory for Ocean Sciences, East Boothbay, ME, USA., Twining BS; Bigelow Laboratory for Ocean Sciences, East Boothbay, ME, USA., Aumont O; LOCEAN, IRD-CNRS-Sorbonne Université-MNHN, IPSL, Paris, France., Boyd PW; Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Tasmania, Australia., Caprara S; College of Marine Science, University of South Florida, St. Petersburg, FL, USA., Homoky WB; School of Earth and Environment, University of Leeds, Leeds, UK., Johnson R; Bermuda Institute of Ocean Sciences, St. George's, Bermuda., König D; School of Environmental Sciences, University of Liverpool, Liverpool, UK.; Department of Oceanography, School of Ocean and Earth Science and Technology, University of Hawai'i at Mānoa, Honolulu, HI, USA., Ohnemus DC; Skidaway Institute of Oceanography, University of Georgia, Department of Marine Sciences, Savannah, GA, USA., Sohst B; Department of Ocean and Earth Sciences, Old Dominion University, Norfolk, VA, USA., Sedwick P; Department of Ocean and Earth Sciences, Old Dominion University, Norfolk, VA, USA.
المصدر: Nature [Nature] 2023 Aug; Vol. 620 (7972), pp. 104-109. Date of Electronic Publication: 2023 Aug 02.
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: Nature Publishing Group Country of Publication: England NLM ID: 0410462 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1476-4687 (Electronic) Linking ISSN: 00280836 NLM ISO Abbreviation: Nature Subsets: MEDLINE
أسماء مطبوعة: Publication: Basingstoke : Nature Publishing Group
Original Publication: London, Macmillan Journals ltd.
مواضيع طبية MeSH: Iron*/analysis , Iron*/chemistry , Iron*/metabolism , Minerals*/analysis , Minerals*/chemistry , Minerals*/metabolism , Seawater*/analysis , Seawater*/chemistry, Ligands ; Carbon Cycle ; Datasets as Topic ; Atlantic Ocean ; Bermuda ; Time Factors ; Seasons ; Solutions/chemistry ; Internationality
مستخلص: Iron is important in regulating the ocean carbon cycle 1 . Although several dissolved and particulate species participate in oceanic iron cycling, current understanding emphasizes the importance of complexation by organic ligands in stabilizing oceanic dissolved iron concentrations 2-6 . However, it is difficult to reconcile this view of ligands as a primary control on dissolved iron cycling with the observed size partitioning of dissolved iron species, inefficient dissolved iron regeneration at depth or the potential importance of authigenic iron phases in particulate iron observational datasets 7-12 . Here we present a new dissolved iron, ligand and particulate iron seasonal dataset from the Bermuda Atlantic Time-series Study (BATS) region. We find that upper-ocean dissolved iron dynamics were decoupled from those of ligands, which necessitates a process by which dissolved iron escapes ligand stabilization to generate a reservoir of authigenic iron particles that settle to depth. When this 'colloidal shunt' mechanism was implemented in a global-scale biogeochemical model, it reproduced both seasonal iron-cycle dynamics observations and independent global datasets when previous models failed 13-15 . Overall, we argue that the turnover of authigenic particulate iron phases must be considered alongside biological activity and ligands in controlling ocean-dissolved iron distributions and the coupling between dissolved and particulate iron pools.
(© 2023. The Author(s), under exclusive licence to Springer Nature Limited.)
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المشرفين على المادة: E1UOL152H7 (Iron)
0 (Ligands)
0 (Minerals)
0 (Solutions)
تواريخ الأحداث: Date Created: 20230802 Date Completed: 20230804 Latest Revision: 20230804
رمز التحديث: 20240628
DOI: 10.1038/s41586-023-06210-5
PMID: 37532817
قاعدة البيانات: MEDLINE
الوصف
تدمد:1476-4687
DOI:10.1038/s41586-023-06210-5