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dc.contributor.authorSubhas, Adam V.
dc.contributor.authorDong, Sijia
dc.contributor.authorNaviaux, John D.
dc.contributor.authorRollins, Nick E.
dc.contributor.authorZiveri, Patrizia
dc.contributor.authorGray, William
dc.contributor.authorRae, James W. B.
dc.contributor.authorLiu, Xuewu
dc.contributor.authorByrne, Robert H.
dc.contributor.authorChen, Sang
dc.contributor.authorMoore, Christopher
dc.contributor.authorMartell-Bonet, Loraine
dc.contributor.authorSteiner, Zvi
dc.contributor.authorAntler, Gilad
dc.contributor.authorHu, Huanting
dc.contributor.authorLunstrum, Abby
dc.contributor.authorHou, Yi
dc.contributor.authorKemnitz, Nathaniel
dc.contributor.authorStutsman, Johnny
dc.contributor.authorPallacks, Sven
dc.contributor.authorDugenne, Mathilde
dc.contributor.authorQuay, Paul D.
dc.contributor.authorBerelson, William M.
dc.contributor.authorAdkins, Jess F.
dc.identifier.citationSubhas , A V , Dong , S , Naviaux , J D , Rollins , N E , Ziveri , P , Gray , W , Rae , J W B , Liu , X , Byrne , R H , Chen , S , Moore , C , Martell-Bonet , L , Steiner , Z , Antler , G , Hu , H , Lunstrum , A , Hou , Y , Kemnitz , N , Stutsman , J , Pallacks , S , Dugenne , M , Quay , P D , Berelson , W M & Adkins , J F 2022 , ' Shallow calcium carbonate cycling in the North Pacific Ocean ' , Global Biogeochemical Cycles , vol. 36 , no. 5 , e2022GB007388 .
dc.identifier.otherPURE: 279645613
dc.identifier.otherPURE UUID: 2af2dd5d-0f67-4c42-a148-bbb43a8adea2
dc.identifier.otherRIS: urn:7C7A44B67B004BDF0AA20FDA0980555C
dc.identifier.otherORCID: /0000-0003-3904-2526/work/113398832
dc.identifier.otherWOS: 000799050400001
dc.identifier.otherScopus: 85130519107
dc.descriptionThis work was funded by NSF OCE-1220301 to W.B., NSF OCE-1220600 to J.F.A., and startup funding for A.V.S.en
dc.description.abstractThe cycling of biologically produced calcium carbonate (CaCO3) in the ocean is a fundamental component of the global carbon cycle. Here, we present experimental determinations of in situ coccolith and foraminiferal calcite dissolution rates. We combine these rates with solid phase fluxes, dissolved tracers, and historical data to constrain the alkalinity cycle in the shallow North Pacific Ocean. The in situ dissolution rates of coccolithophores demonstrate a nonlinear dependence on saturation state. Dissolution rates of all three major calcifying groups (coccoliths, foraminifera, and aragonitic pteropods) are too slow to explain the patterns of both CaCO3 sinking flux and alkalinity regeneration in the North Pacific. Using a combination of dissolved and solid-phase tracers, we document a significant dissolution signal in seawater supersaturated for calcite. Driving CaCO3 dissolution with a combination of ambient saturation state and oxygen consumption simultaneously explains solid-phase CaCO3 flux profiles and patterns of alkalinity regeneration across the entire N. Pacific basin. We do not need to invoke the presence of carbonate phases with higher solubilities. Instead, biomineralization and metabolic processes intimately associate the acid (CO2) and the base (CaCO3) in the same particles, driving the coupled shallow remineralization of organic carbon and CaCO3. The linkage of these processes likely occurs through a combination of dissolution due to zooplankton grazing and microbial aerobic respiration within degrading particle aggregates. The coupling of these cycles acts as a major filter on the export of both organic and inorganic carbon to the deep ocean.
dc.relation.ispartofGlobal Biogeochemical Cyclesen
dc.rightsCopyright © 2022. American Geophysical Union. All Rights Reserved. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the final published version of the work, which was originally published at
dc.subjectCalcium carbonateen
dc.subjectCarbon cycleen
dc.subjectGB Physical geographyen
dc.titleShallow calcium carbonate cycling in the North Pacific Oceanen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Earth & Environmental Sciencesen
dc.contributor.institutionUniversity of St Andrews. Centre for Energy Ethicsen
dc.contributor.institutionUniversity of St Andrews. St Andrews Isotope Geochemistryen
dc.description.statusPeer revieweden

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