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SPADE SIGNED

Speleothems paleoclimate: accounting for isotopic disequilibrium

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EC-Contrib. €

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Partnership

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 SPADE project word cloud

Explore the words cloud of the SPADE project. It provides you a very rough idea of what is the project "SPADE" about.

connections    difficult    quantifying    calibrations    treatment    speleothem    temperature    rainfall    devils    hemispheric    first    17o    transferring    dryland    amount    recording    shift    experiments    paleoclimate    limitation    geological    framework    model    land    slow    hole    modern    create    geochemical    quantitative    material    speleothems    reactions    scales    surface    disequilibrium    drought    suffers    quantify    flooding    assumed    sources    correct    impacts    form    vulnerable    underlying    carbonates    archives    events    recorders    data    combined    regions    droughts    moisture    comparisons    18o    patterns    israel    evaporation    overcome    classic    equilibrium    faster    understanding    chemical    respect    47    interplay    carbonate    isotopic    respective    laboratory    spade    climatic    soreq    cave    regarding    hypotheses    isolate    tracers    broadly    proxies    nevada    regional    consideration    innovative    records    variability    delta    climate    tools    hydrology    extended    analog   

Project "SPADE" data sheet

The following table provides information about the project.

Coordinator		 THE HEBREW UNIVERSITY OF JERUSALEM 

Organization address
address: EDMOND J SAFRA CAMPUS GIVAT RAM
city: JERUSALEM
postcode: 91904
website: www.huji.ac.il

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.
 Coordinator Country Israel [IL]
 Total cost 2˙000˙000 €
 EC max contribution 2˙000˙000 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2016-COG
 Funding Scheme ERC-COG
 Starting year 2017
 Duration (year-month-day) from 2017-09-01   to  2022-08-31

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    THE HEBREW UNIVERSITY OF JERUSALEM IL (JERUSALEM) coordinator 2˙000˙000.00

Map

 Project objective

Understanding and quantifying the impacts of climate change at the regional and hemispheric scales are particularly difficult with respect to changes in rainfall and temperature patterns that lead to extended droughts and flooding events. Isotopic records in speleothems are increasingly used to determine climate variability on land and for data-model comparisons. However, transferring speleothem records into quantitative climate parameters suffers from a major limitation: speleothem formation processes result in geochemical disequilibrium and there is currently no way to correct for it in paleoclimate data. SPADE will shift the treatment of paleoclimate archives from regarding them as recorders of slow geological processes to consideration of geological material as recording much faster chemical reactions. As such, they cannot be assumed to form at equilibrium. SPADE will create a new framework, based on one classic and two novel isotopic tracers in carbonates (δ18O-Δ17O-Δ47) to quantify disequilibrium in cave records and overcome this underlying limitation. SPADE’s unique approach is based first on laboratory experiments that isolate chemical processes of speleothem formation, to test their respective effects on isotopic disequilibrium. Then speleothem analog experiments and modern cave material are combined to create speleothem specific calibrations for these isotopic proxies. These SPADE results will then be applied to classic paleoclimate records of dryland hydrology, such as Soreq Cave (Israel) and Devils Hole (Nevada). SPADE will address long standing climatic hypotheses regarding the interplay between temperature, amount of rainfall, surface evaporation, moisture sources, and regional climate connections in these drought vulnerable regions, and will make these records much more useful. A detailed understanding of disequilibrium will enable the use of these innovative geochemical tools in speleothems and more broadly, in other paleoclimate carbonate archives.

 Publications

year authors and title journal last update
List of publications.
2020 Ny Riavo G. Voarintsoa, Eugeni Barkan, Shelly Bergel, Rolf Vieten, Hagit P. Affek
Triple oxygen isotope fractionation between CaCO3 and H2O in inorganically precipitated calcite and aragonite
published pages: 119500, ISSN: 0009-2541, DOI: 10.1016/j.chemgeo.2020.119500 		Chemical Geology 539 2020-03-23
2019 Eugeni Barkan, Hagit Affek, Boaz Luz, Shelly Bergel, Ny Riavo Voarintsoa, Israela Musan
Calibration of δ 17 O and 17 O excess values of three international standards: IAEA-603, NBS19 and NBS18
published pages: , ISSN: 0951-4198, DOI: 10.1002/rcm.8391 		Rapid Communications in Mass Spectrometry 2019-05-15

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