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The Iso2k database: a global compilation of paleo-δ 18 O and δ 2 H records to aid understanding of Common Era climate

Bronwen Konecky 1 Nicholas Mckay 2 Olga Churakova 3 Laia Comas-Bru 4 Emilie Dassié 5 Kristine Delong 6 Georgina Falster 1 Matt Fischer 7 Matthew Jones 8 Lukas Jonkers 9 Darrell Kaufman 2 Guillaume Leduc 10 Shreyas Managave 11 Belen Martrat 12 Thomas Opel 13 Anais Orsi 14 Judson Partin 15 Hussein Sayani 16 Elizabeth Thomas 17 Diane Thompson 18 Jonathan Tyler 19 Nerilie Abram 20 Alyssa Atwood 21 Olivier Cartapanis 22 Jessica Conroy 23 Mark Curran 24 Sylvia Dee 25 Michael Deininger 26 Dmitry Divine 27 Zoltán Kern 28 Trevor Porter 29 Samantha Stevenson 30 Lucien von Gunten 31
Abstract : Reconstructions of global hydroclimate during the Common Era (CE; the past ∼ 2000 years) are important for providing context for current and future global environmental change. Stable isotope ratios in water are quantitative indicators of hydroclimate on regional to global scales, and these signals are encoded in a wide range of natural geologic archives. Here we present the Iso2k database, a global compilation of previously published datasets from a variety of natural archives that record the stable oxygen (δ 18 O) or hydrogen (δ 2 H) isotopic compositions of environmental waters, which reflect hydroclimate changes over the CE. The Iso2k database contains 759 isotope records from the terrestrial and marine realms, including glacier and ground ice (210); speleothems (68); corals, sclerosponges, and mollusks (143); wood (81); lake sediments and other terrestrial sediments (e.g., loess) (158); and marine sediments (99). Individual datasets have temporal resolutions ranging from sub-annual to centennial and include chronological data where available. A fundamental feature of the database is its comprehensive metadata, which will assist both experts and nonex-perts in the interpretation of each record and in data synthesis. Key metadata fields have standardized vocabularies to facilitate comparisons across diverse archives and with climate-model-simulated fields. This is the first global-scale collection of water isotope proxy records from multiple types of geological and biological archives. It is suitable for evaluating hydroclimate processes through time and space using large-scale synthesis , model-data intercomparison and (paleo)data assimilation. The Iso2k database is available for download at https://doi.org/10.25921/57j8-vs18 (Konecky and McKay, 2020) and is also accessible via the NOAA/WDS Paleo Data landing page: https://www.ncdc.noaa.gov/paleo/study/29593 (last access: 30 July 2020).
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Bronwen Konecky, Nicholas Mckay, Olga Churakova, Laia Comas-Bru, Emilie Dassié, et al.. The Iso2k database: a global compilation of paleo-δ 18 O and δ 2 H records to aid understanding of Common Era climate. Earth Syst. Sci. Data, 2020, 12, pp.2261 - 2288. ⟨10.5194/essd-12-2261-2020⟩. ⟨hal-02989903⟩

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