High-Frequency Holocene Glacier Fluctuations in New Zealand Differ from the Northern Signature

Publication Type  Journal Article
Year of Publication  2009
Authors  Schaefer, J. M.; Denton, G. H.; Kaplan, M.; Putnam, A.; Finkel, R. C.; Barrell, D. J. A.; Andersen, B. G.; Schwartz, R.; Mackintosh, A.; Chinn, T.; Schluchter, C.
Journal Title  Science
Volume  324
Issue  5927
Pages  622-625
Journal Date  May 1
ISBN Number  0036-8075
Accession Number  ISI:000265608800038
Key Words  weathering-rind thickness; medieval warm period; cook-national-park; ice-age; southern alps; climate; temperature; circulation; patterns; moraines

Understanding the timings of interhemispheric climate changes during the Holocene, along with their causes, remains a major problem of climate science. Here, we present a high-resolution Be-10 chronology of glacier fluctuations in New Zealand's Southern Alps over the past 7000 years, including at least five events during the last millennium. The extents of glacier advances decreased from the middle to the late Holocene, in contrast with the Northern Hemisphere pattern. Several glacier advances occurred in New Zealand during classic northern warm periods. These findings point to the importance of regional driving and/ or amplifying mechanisms. We suggest that atmospheric circulation changes in the southwest Pacific were one important factor in forcing high-frequency Holocene glacier fluctuations in New Zealand.


439DWTimes Cited:1Cited References Count:31

URL  <Go to ISI>://000265608800038
DOI  DOI 10.1126/science.1169312