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Paper in press: Margins matter for the Arctic barium budget

GN01 Barium Isotope Data

What controls the distribution of dissolved barium in the Arctic? This is the question we tried to answer in a recent study led by Laura Whitmore. The study integrates measurements of dissolved and particulate barium and barium isotope compositions measured on samples collected during four GEOTRACES Arctic expeditions in 2015—GN01, GN02, GN03, and GN04 (HLY1502,…

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Paper in press: Studying sinking in the subarctic Pacific

Study led my Muntsa Roca-Martí published in Elem. Sci. Anth. examining the composition, modification, and export of particulate bioelements (C, N, P, Si) at Ocean Station Papa. This comprehensive characterization of marine particles was conducted as part of the first EXPORTS field campaign in the northeast Pacific, and the paper is part of a special…

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Paper in press: A perspective on the progress of GEOTRACES

Review of recent developments in the study of trace elements and their isotopes in the ocean published today. This study rounds out a Virtual Special Issue of Chemical Geology entitled: Cycles of trace elements and isotopes in the ocean – GEOTRACES and beyond…, and is authored by the Guest Editors: Tim Conway, Tristan Horner, Yves Plancherel, and…

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Paper in press: More than mud

Study led by Ann Dunlea and Logan Tegler published in Chemical Geology. This study investigates how pelagic clays can record the iron isotope composition of seawater and explores what these records reveal about iron cycling in the South Pacific over the last 95 million years. Full citation: Dunlea, A. G., Tegler, L. A., Peucker-Ehrenbrink, B.,…

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Paper in press: Barium isotopes

Barium Isotopes, published today by Cambridge University Press as part of the series Geochemical Tracers in Earth System Science. Led by Tristan Horner and Peter Crockford, the book reviews the latest and greatest developments in barium isotope geochemistry. Full citation: Horner, T. J., & Crockford, P. W. (2021). Barium Isotopes: Drivers, Dependencies, and Distributions through…

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Paper in press: Groundwater goes global

Study led by Kim Mayfield published in Nat. Commun. illustrating the impact of groundwater inputs on marine isotope budgets (including for barium!). Full citation: Mayfield, K. K., Eisenhauer, A., Ramos, D. P. S., Higgins, J. A., Horner, T. J., Auro, M., Magna, T., Moosdorf, N., Charette, M. A., Gonneea, M. E., Brady, C. E., Komar,…

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Paper in press: Bringing barite formation into focus

Study led by Francisca Martínez-Ruiz published in Front. Earth Sci. showing similar patterns of barite precipitation throughout the mesopelagic ocean, suggesting a common (organo)mineralization driving process. This paper is part of a special issue entitled: The Oceanic Particle Flux and its Cycling Within the Deep Water Column. Full citation: Martínez Ruíz, F. C., Paytan, A.,…

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Paper in press: Barium-isotopic mass balance of subduction zones

Study led by Sune Nielsen published in Geochim. et Cosmochim. Acta exploring the ‘ins and outs’ of the Aleutian and Ryukyu Arcs, showing only minor fractionations associated with Ba mobilization from the down-going slab, thus underscoring the utility of Ba isotopes to apportion fluid sources to arc magmas. Full citation: Nielsen, S. G., Shu, Y.,…

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