Twentieth-century surface temperature trends in the western
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TitleTwentieth-century surface temperature trends in the western ross sea, antarctica: Evidence from a high-resolution ice coreAbstractA 125-yr ice core record of climate from the Whitehall Glacier ice divide provides exceptionally highresolution stable isotope data from the northwest margin of the Ross Sea, Antarctica. This is the only proxy data available to extend the instrumental record of temperature in this region, where little is known about climate variability over the past two centuries. Using ECMWF Interim Re-Analysis (ERA-Interim) data, this study develops a precipitation-weighted ÃŽv Z 18O-temperature transfer function of 0.62A^circC -1, which is comparable to other proximal ice cores, such as Taylor, Talos, and LawDomes. Reconstructed mean annual temperatures show no significant change between 1882 and 2006. However, a decrease in cold season [April-September (AMJJAS)] temperatures of -1.59Ã‚^circ Ã‚Â± 0.84Ã‚^circC decade -1 (at 90% confidence) is observed since 1979. This cooling trend is in contrast to a surface temperature record from Ross Island (Scott Base) where significant spring warming is observed. It is also coincident with a positive trend in the southern annular mode, which is linked to stronger southerly winds and increased sea ice extent and duration in the western Ross Sea. Copyright 2012 American Meteorological Society.AcknowledgementsThis project was funded by the New Zealand Foundation of Research Science and Technology (now the Ministry for Science and Innovation) via contracts awarded to Victoria University of Wellington, GNS Science (VICX0704, CO5X0202) and an N.Z. Foundation for Research, Science, and Technology Postdoctoral Fellowship (Contract CO5X0902). We are grateful for logistical support for the ice core extraction (K049) by Antarctica New Zealand, Scott Base, and the U.S. Polar Program. TvO acknowledges support of the Australian GovernmentÅ› Cooperative Research Centres Programme through the Antarctic Climate and Ecosystems CRC. ERA-Interim data were obtained from the ECMRWF online at http://data.ecmwf.int/data. We are also grateful to the Italian Antarctic Program and the University of Wisconsin---Madison (Antarctic Meteorological Research Center) for the use of weather station data.
1st AuthorSinclair, K.AuthorSinclair, K.Bertler, N.Van Ommen, T.Year2012JournalJournal of ClimateVolume25Number10Pages3629-3636DOI10.1175/JCLI-D-11-00496.1KeywordsAntarctic oscillationAntarcticaClimate recordClimate variabilityIsotopic analysisSurface temperatures, ClimatologyIsotopesSea iceSurface properties, Atmospheric temperature, Antarctic Oscillationclimate changeclimate variationice coreisotopic analysisprecipitation assessmentsea surface temperaturestable isotopesurface temperaturetrend analysistwentieth century, Ross SeaSouthern Ocean, rank5Author KeywordsAntarctic OscillationAntarcticaClimate recordsClimate variabilityIsotopic analysisSurface temperature
TypeArticleCitationSinclair, K., Bertler, N., Bowen, M. and Arrigo, K. (2014) Twentieth century sea-ice trends in the Ross Sea from a high-resolution, coastal ice-core record. Geophysical Research Letters, 41(10): 3510-3516 doi:10.1002/2014GL059821
Twentieth-century surface temperature trends in the western Antarctica NZ, accessed 16 Aug 2022, https://adam.antarcticanz.govt.nz/nodes/view/63770, 10.1175/JCLI-D-11-00496.1