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SPADE SIGNED

Speleothems paleoclimate: accounting for isotopic disequilibrium

Total Cost €

0

EC-Contrib. €

0

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.

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

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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