Possible evidence for wet Heinrich phases in tropical NE Australia: the Lynch's Crater deposit

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dc.contributor.authorMuller, Jen_AU
dc.contributor.authorKylander, Men_AU
dc.contributor.authorWust, RAJen_AU
dc.contributor.authorWeiss, Den_AU
dc.contributor.authorMartinez-Cortizas, Aen_AU
dc.contributor.authorLeGrande, ANen_AU
dc.contributor.authorJennerjahn, Ten_AU
dc.contributor.authorBehling, Hen_AU
dc.contributor.authorAnderson, WTen_AU
dc.contributor.authorJacobsen, GEen_AU
dc.date.accessioned2009-06-17T01:51:43Zen_AU
dc.date.accessioned2010-04-30T05:07:26Zen_AU
dc.date.available2009-06-17T01:51:43Zen_AU
dc.date.available2010-04-30T05:07:26Zen_AU
dc.date.issued2008-03en_AU
dc.date.statistics2008-03en_AU
dc.description.abstractUnarguably, one of the most significant paleoclimatological discoveries of the last two decades has been that of abrupt climate events (Dansgaard-Oeschger cycles and Heinrich events). Most evidence for these events has originated from the high-latitude Northern Hemisphere.. with few records documenting the response of the low latitude Southern Hemisphere. Here we present new data from Lynch's Crater, a unique terrestrial record from NE-Australia that may show evidence for southward propagations of the Intertropical Convergence Zone (ITCZ) during abrupt climate perturbations as a result of alteration of the low latitude air masses. Proxies for precipitation/wetness indicate enhanced rainfall in the region during Heinrich events (H events 1-3) and the 8.2 ka Northern Hemisphere cold event. A fully coupled atmosphere/ocean climate model simulating a 1 Sv freshwater influx to the North Atlantic Ocean produces a scenario which agrees with the climate changes shown by the Lynch's Crater record. The model shows precipitation anomalies that include a southward migration of the ITCZ and a zonal shift in mid-latitude storm tracks over the Southern Hemisphere equatorial region. These data indicate large-scale shifts of the austral summer ITCZ position that is known to control monsoonal precipitation in NE Australia. This terrestrial record from Australia may demonstrate the involvement of the tropical western Pacific Ocean in ITCZ migrations during abrupt climate events of the last glacial period. Defining such past migrations offers insight into the importance and role of the equatorial region in global climate dynamics. © 2007, Elsevier Ltd.en_AU
dc.identifier.citationMuller, J., Kylander, M., Wust, R. A. J., Weiss, D., Martinez-Cortizas, A., LeGrande, A. N., Jennerjahn, T., Behling, H., Anderson, W. T, & Jacobsen, G. (2008). Possible evidence for wet Heinrich phases in tropical NE Australia: the Lynch's Crater deposit. Quaternary Science Reviews, 27(5-6), 468-475. doi:10.1016/j.quascirev.2007.11.006en_AU
dc.identifier.govdoc1476en_AU
dc.identifier.issn0277-3791en_AU
dc.identifier.issue5-6en_AU
dc.identifier.journaltitleQuaternary Science Reviewsen_AU
dc.identifier.pagination468-475en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.quascirev.2007.11.006en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/1391en_AU
dc.identifier.volume27en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectClimatesen_AU
dc.subjectNorthern Hemisphereen_AU
dc.subjectPrecipitationen_AU
dc.subjectTropical regionsen_AU
dc.subjectAustraliaen_AU
dc.subjectPaleoclimatologyen_AU
dc.titlePossible evidence for wet Heinrich phases in tropical NE Australia: the Lynch's Crater depositen_AU
dc.typeJournal Articleen_AU
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