dc.contributor.author | McDermott, Frank | |
dc.contributor.author | Atkinson, Tim | |
dc.contributor.author | Fairchild, Ian J. | |
dc.contributor.author | Baldini, Lisa M. | |
dc.contributor.author | Mattey, David P. | |
dc.date.accessioned | 2012-06-26T13:38:49Z | |
dc.date.available | 2012-06-26T13:38:49Z | |
dc.date.copyright | 2011 Elsevier B.V. | en |
dc.date.issued | 2011-12 | |
dc.identifier.citation | Global and Planetary Change | en |
dc.identifier.uri | http://hdl.handle.net/10197/3697 | |
dc.description.abstract | Oxygen isotope data for well dated Holocene speleothems from Europe have been compiled for the first time. The data were analysed at 1 ka time slices through the Holocene by taking averages of 50 year duration. After filtering the data to exclude high altitude, high latitude and sites proximal to the Mediterranean Sea, the data exhibit surprisingly tight linear correlations between speleothem O isotope values and longitude. The slope of the data on δ18O vs. longitude plots changes systematically from the early to the late Holocene, exhibiting a much steeper zonal gradient in the early Holocene. Changes in the isotope gradient through the course of the Holocene reflect both a gradual increase in δ18O in speleothems from the western margin of the transect and a simultaneous decrease in speleothem δ18O on the eastern end of the transect. These changes follow summer insolation trends through most of the Holocene, but show marked deviations from c. 4 ka to the present day. Steeper early Holocene zonal isotope gradients are attributed primarily to a combination of early Holocene warming in the west and intense convective rainfall over the European continent in summer time driven by high early Holocene summer insolation. Although the absolute δ18O values preserved in speleothems do not precisely reflect the equilibrium values with respect to the waters from which they are precipitated, the tight isotope-longitude correlations indicate that speleothems are reliable recorders of combined rainfall O isotope signals and air temperature. | en |
dc.description.sponsorship | Science Foundation Ireland | en |
dc.format.extent | 1455713 bytes | |
dc.format.mimetype | application/pdf | |
dc.language.iso | en | en |
dc.publisher | Elsevier | en |
dc.relation.requires | Geological Sciences Research Collection | en |
dc.rights | This is the author’s version of a work that was accepted for publication in Global and Planetary Change. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Global and Planetary Change (Volume 79, Issues 3–4, December 2011, Pages 275–287) DOI: 10.1016/j.gloplacha.2011.01.005 | en |
dc.subject | Speleothems | en |
dc.subject | Oxygen isotopes | en |
dc.subject | Isotope gradients | en |
dc.subject | Holocene | en |
dc.subject | Climate Change | en |
dc.subject | Palaeoclimate | en |
dc.subject.lcsh | Speleothems | en |
dc.subject.lcsh | Oxygen--Isotopes | en |
dc.subject.lcsh | Paleoclimatology--Holocene | en |
dc.subject.lcsh | Climatic changes | en |
dc.title | A first evaluation of the spatial gradients in δ18Orecorded by European Holocene speleothems | en |
dc.type | Journal Article | en |
dc.internal.availability | Full text available | en |
dc.status | Peer reviewed | en |
dc.identifier.volume | 79 | en |
dc.identifier.issue | 3-4 | en |
dc.identifier.startpage | 275 | en |
dc.identifier.endpage | 287 | en |
dc.citation.other | Rapid climate change: lessons from the recent geological past | en |
dc.identifier.doi | 10.1016/j.gloplacha.2011.01.005 | |
dc.neeo.contributor | McDermott|Frank|aut| | en |
dc.neeo.contributor | Atkinson|Tim|aut| | en |
dc.neeo.contributor | Fairchild|Ian J.|aut| | en |
dc.neeo.contributor | Baldini|Lisa M.|aut| | en |
dc.neeo.contributor | Mattey|David P.|aut| | en |
dc.description.admin | au, ab. kpw22/6/12 | en |
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