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The Iso2k database: a global compilation of paleo-δ18O and δ2H records to aid understanding of Common Era climate

Bronwen Konecky 1 Nicholas Mckay 2 Olga Churakova (sidorova) 3, 4 Laia Comas-Bru 5 Émilie Dassié 6 Kristine Delong 7 Georgina Falster 1 Matt Fischer 8 Matthew Jones 9 Lukas Jonkers 10 Darrell Kaufman 2 Guillaume Leduc 11 Shreyas Managave 12 Belen Martrat 13 Thomas Opel 14 Anais Orsi 15 Judson Partin 16 Hussein Sayani 17 Elizabeth Thomas 18 Diane Thompson 19 Jonathan Tyler 20 Nerilie Abram 21 Alyssa Atwood 22 Olivier Cartapanis 23, 24 Jessica Conroy 25 Mark Curran 26 Sylvia Dee 27 Michael Deininger 28 Dmitry Divine 29 Zoltán Kern 30 Trevor Porter 31 Samantha Stevenson 32 Lucien von Gunten 33 Marie-Alexandrine Sicre 34
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 (δ18O) or hydrogen (δ2H) 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 nonexperts 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 (sidorova), Laia Comas-Bru, Émilie Dassié, et al.. The Iso2k database: a global compilation of paleo-δ18O and δ2H records to aid understanding of Common Era climate. Earth System Science Data, Copernicus Publications, 2020, 12 (3), pp.2261-2288. ⟨10.5194/essd-12-2261-2020⟩. ⟨insu-02947242⟩

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