Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/17220
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dc.contributor.authorMcCulloch, Robert-
dc.contributor.authorBentley, Michael J-
dc.contributor.authorPurves, Ross S-
dc.contributor.authorHulton, Nicholas R J-
dc.contributor.authorSugden, David E-
dc.contributor.authorClapperton, Chalmers M-
dc.date.accessioned2013-10-31T23:47:03Z-
dc.date.issued2000-05-
dc.identifier.urihttp://hdl.handle.net/1893/17220-
dc.description.abstractThere is uncertainty about the interhemispheric timing of climatic changes during the last glacial–interglacial transition. Different hypotheses, relying on different lines of evidence, point variously to the Northern Hemisphere leading the Southern Hemisphere and vice versa, or to synchrony between the hemispheres. Southern South America is well placed to test the various alternatives using both glacial and palaeoecological evidence. We argue here from a synthesis of key proxy records that there was a sudden rise in temperature that initiated deglaciation sychronously over 16° of latitude at 14 600–14 300 14C yr BP (17 500–17 150 cal. yr). There was a second step of warming in the Chilean Lake District at 13 000–12 700 14C yr BP (15 650–15 350 cal. yr), which saw temperatures rise to close to modern values. A third warming step, particularly clear in the south, occurred at ca. 10 000 14C yr BP (11 400 cal. yr), the latter achieving Holocene levels of warmth. Following the initial warming, there was a lagged response in precipitation as the westerlies, after a delay of ca. 1600 yr, migrated from their northern glacial location to their present latitude, which was attained by 12 300 14C yr BP (14 300 cal. yr). The latitudinal contrasts in the timing of maximum precipitation are reflected in regional contrasts in vegetation change and in glacier behaviour. The large scale of a 80-km glacier advance in the Strait of Magellan at 12 700–10 300 14C yr BP (15 350–12 250 cal. yr), which spans the Antarctic Cold Reversal and the Younger Dryas, was influenced by the return of the westerlies to southern latitudes. The delay in the migration of the westerlies coincides with the Heinrich 1 iceberg event in the North Atlantic. The suppressed global thermohaline circulation at the time may have affected sea-surface temperatures in the South Pacific, and the return of the westerlies to their present southerly latitude only followed ocean reorganisation to its present interglacial mode.en_UK
dc.language.isoen-
dc.publisherWiley-Blackwell-
dc.relationMcCulloch R, Bentley MJ, Purves RS, Hulton NRJ, Sugden DE & Clapperton CM (2000) Climatic inferences from glacial and palaeoecological evidence at the last glacial termination, southern South America, Journal of Quaternary Science, 15 (4), pp. 409-417.-
dc.rightsThe publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.-
dc.subjectSouth Americaen_UK
dc.subjectPatagoniaen_UK
dc.subjectlast glacial terminationen_UK
dc.subjectpalaeoecologyen_UK
dc.subjectice sheetsen_UK
dc.titleClimatic inferences from glacial and palaeoecological evidence at the last glacial termination, southern South Americaen_UK
dc.typeJournal Articleen_UK
dc.rights.embargodate2999-12-31T00:00:00Z-
dc.rights.embargoreasonThe publisher does not allow this work to be made publicly available in this Repository therefore there is an embargo on the full text of the work.-
dc.citation.jtitleJournal of Quaternary Science-
dc.citation.issn0267-8179-
dc.citation.volume15-
dc.citation.issue4-
dc.citation.spage409-
dc.citation.epage417-
dc.citation.publicationstatusPublished-
dc.citation.peerreviewedRefereed-
dc.type.statusPublisher version (final published refereed version)-
dc.identifier.urlhttp://onlinelibrary.wiley.com/doi/10.1002/1099-1417(200005)15:4%3C409::AID-JQS539%3E3.0.CO;2-%23/abstract-
dc.author.emailrobert.mcculloch@stir.ac.uk-
dc.contributor.affiliationBiological and Environmental Sciences-
dc.contributor.affiliationUniversity of Edinburgh-
dc.contributor.affiliationUniversity of Edinburgh-
dc.contributor.affiliationUniversity of Edinburgh-
dc.contributor.affiliationUniversity of Edinburgh-
dc.contributor.affiliationUniversity of Aberdeen-
dc.rights.embargoterms2999-12-31-
dc.rights.embargoliftdate2999-12-31-
dc.identifier.isi000087975500010-
Appears in Collections:Biological and Environmental Sciences Journal Articles

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