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SPADE SIGNED

Speleothems paleoclimate: accounting for isotopic disequilibrium

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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.

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

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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