A cosmogenic nuclide chronology of the last glacial transition in North-West Nelson, New Zealand—new insights in Southern Hemisphere climate forcing during the last deglaciation

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dc.contributor.authorShulmeister, Jen_AU
dc.contributor.authorFink, Den_AU
dc.contributor.authorAugustinus, PCen_AU
dc.date.accessioned2021-12-16T00:14:04Zen_AU
dc.date.available2021-12-16T00:14:04Zen_AU
dc.date.issued2005-05-15en_AU
dc.date.statistics2021-11-08en_AU
dc.description.abstractWe present a new glacial chronology for the last glacial interglacial transition, c. 20 to 10 ka, from the Cobb Valley, NW Nelson, New Zealand, based on a suite of 10Be and 26Al cosmogenic exposure ages. This chronology describes one of the most comprehensive deglaciation sequences from a late Quaternary valley system in the Southern Hemisphere. We chronicle the decay from the last (local) glacial maximum as follows: onset of the last deglaciation that commenced no earlier than 18–19 ka, followed by numerous short-term still-stands and/or minor re-advances over the ensuing 3–4 kyr, and complete evacuation of ice by 14 ka. We find no evidence to indicate a late glacial re-advance commensurate with the Northern Hemisphere Younger Dryas chronozone. The absence of a major glacial re-advance in this valley during the latter stages of the last glacial interglacial transition (LGIT) precludes a thermal decline in excess of about 3 °C and suggests no decline. The absence of late LGIT re-advances in the mountains of North-West Nelson, while deglacial readvances occurred in the main ranges of the Southern Alps can be best explained if westerly wind forcing rather than large-scale thermal decline is the primary control on glacier fluctuations, at least during the deglaciation. These findings challenge models of global climate change predicated on synchrony of millennial-scale glacial transitions due to thermal changes between Northern and Southern Hemispheres. © 2005 Elsevier B.V.en_AU
dc.identifier.citationShulmeister, J., Fink, D., & Augustinus, P. C. (2005). A cosmogenic nuclide chronology of the last glacial transition in North-West Nelson, New Zealand—new insights in Southern Hemisphere climate forcing during the last deglaciation. Earth and Planetary Science Letters, 233(3–4), 455-466. doi:10.1016/j.epsl.2005.02.028en_AU
dc.identifier.issn0012-821Xen_AU
dc.identifier.issue3-4en_AU
dc.identifier.journaltitleEarth and Planetary Science Lettersen_AU
dc.identifier.pagination455-466en_AU
dc.identifier.urihttps://doi.org/10.1016/j.epsl.2005.02.028en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/12466en_AU
dc.identifier.volume233en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectNew Zealanden_AU
dc.subjectAge estimationen_AU
dc.subjectPaleoclimatologyen_AU
dc.subjectSouthern Hemisphereen_AU
dc.subjectGlaciersen_AU
dc.subjectClimatic changeen_AU
dc.titleA cosmogenic nuclide chronology of the last glacial transition in North-West Nelson, New Zealand—new insights in Southern Hemisphere climate forcing during the last deglaciationen_AU
dc.typeJournal Articleen_AU
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