Drip water isotopes in semi-arid karst: implications for speleothem paleoclimatology

Simple item page
dc.contributor.authorCuthbert, MOen_AU
dc.contributor.authorBaker, AAen_AU
dc.contributor.authorJex, CNen_AU
dc.contributor.authorGraham, PWen_AU
dc.contributor.authorTreble, PCen_AU
dc.contributor.authorAndersen, MSen_AU
dc.contributor.authorAcworth, RIen_AU
dc.date.accessioned2014-10-28T04:52:01Zen_AU
dc.date.available2014-10-28T04:52:01Zen_AU
dc.date.issued2014-06-01en_AU
dc.date.statistics2014-10-28en_AU
dc.description.abstractWe report the results of the first multi-year monitoring and modelling study of the isotopic composition of drip waters in a semi-arid karst terrane. High temporal resolution drip rate monitoring combined with monthly isotope drip water and rainfall sampling at Cathedral Cave, Australia, demonstrates that drip water discharge to the cave occurs irregularly, and only after occasional long duration and high volume rainfall events, where the soil moisture deficit and evapotranspiration is overcome. All drip waters have a water isotopic composition that is heavier than the weighted mean annual precipitation, some fall along the local meteoric water line, others trend towards an evaporation water line. It is hypothesised that, in addition to the initial rainfall composition, evaporation of unsaturated zone water, as well as the time between infiltration events, are the dominant processes that determine infiltration water isotopic composition. We test this hypothesis using a soil moisture balance and isotope model. Our research reports, for the first time, the potential role of sub-surface evaporation in altering drip water isotopic composition, and its implications for the interpretation of speleothem delta O-18 records from arid and semi-arid regions. © 2014, Elsevier Ltd.en_AU
dc.identifier.citationCuthbert, M. O., Baker, A., Jex, C. N., Graham, P. W., Treble, P. C., Andersen, M. S., & Acworth, R. I. (2014). Drip water isotopes in semi-arid karst: implications for speleothem paleoclimatology. Earth and Planetary Science Letters, 395, 194-204. doi:10.1016/j.epsl.2014.03.034en_AU
dc.identifier.govdoc5797en_AU
dc.identifier.issn0012-821Xen_AU
dc.identifier.journaltitleEarth and Planetary Science Lettersen_AU
dc.identifier.pagination194-204en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.epsl.2014.03.034en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/5962en_AU
dc.identifier.volume395en_AU
dc.language.isoenen_AU
dc.publisherElsevier Science BVen_AU
dc.subjectGroundwater rechargeen_AU
dc.subjectStable isotopesen_AU
dc.subjectArid landsen_AU
dc.subjectIsotopesen_AU
dc.subjectEvaporationen_AU
dc.subjectWateren_AU
dc.titleDrip water isotopes in semi-arid karst: implications for speleothem paleoclimatologyen_AU
dc.typeJournal Articleen_AU
Files
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Journal Articles