James Ross Island Ice Core 14,000 Year Deuterium Temperature Data Mulvaney, R.; Abram, N.J.; Hindmarsh, R.C.A.; Arrowsmith, C.; Fleet, L.; Triest, J.; Sime, L.C.; Alemany, O.; Foord, S. Mulvaney, R. Abram, N.J. Hindmarsh, R.C.A. Arrowsmith, C. Fleet, L. Triest, J. Sime, L.C. Alemany, O. Foord, S. earth science/paleoclimate/climate reconstructions|ice cores (ice age at sample end,null,null,calendar year before present,null,climate reconstructions|ice cores,null,null,N,null) earth science/paleoclimate/climate reconstructions|ice cores (surface temperature,null,one standard error lower bound,degree Celsius,null,climate reconstructions|ice cores,anomalized|corrected,null,N,null) earth science/paleoclimate/climate reconstructions|ice cores (surface temperature,null,one standard error upper bound,degree Celsius,null,climate reconstructions|ice cores,anomalized|corrected,null,N,null) earth science/paleoclimate/climate reconstructions|ice cores (ice age at sample start,null,null,calendar year before present,null,climate reconstructions|ice cores,null,null,N,null) earth science/paleoclimate/ice cores (delta 2H,bulk ice,null,per mil VSMOW,null,ice cores,averaged,null,N,null) earth science/paleoclimate/climate reconstructions|ice cores (ice age,null,null,calendar year before present,null,climate reconstructions|ice cores,null,null,N,null) earth science/paleoclimate/ice cores (delta 2H,bulk ice,null,per mil VSMOW,null,ice cores,null,null,N,null) earth science/paleoclimate/climate reconstructions|ice cores (surface temperature,null,null,degree Celsius,null,climate reconstructions|ice cores,anomalized|corrected,null,N,null) earth science/paleoclimate/ice core (James Ross Island>LATITUDE -64.2017>LONGITUDE -57.685) Rapid warming over the past 50 years on the Antarctic Peninsula is associated with the collapse of a number of ice shelves and accelerating glacier mass loss. In contrast, warming has been comparatively modest over West Antarctica and significant changes have not been observed over most of East Antarctica, suggesting that the ice-core palaeoclimate records available from these areas may not be representative of the climate history of the Antarctic Peninsula. Here we show that the Antarctic Peninsula experienced an early-Holocene warm period followed by stable temperatures, from about 9,200 to 2,500 years ago, that were similar to modern-day levels. Our temperature estimates are based on an ice-core record of deuterium variations from James Ross Island, off the northeastern tip of the Antarctic Peninsula. We find that the late-Holocene development of ice shelves near James Ross Island was coincident with pronounced cooling from 2,500 to 600 years ago. This cooling was part of a millennial-scale climate excursion with opposing anomalies on the eastern and western sides of the Antarctic Peninsula. Although warming of the northeastern Antarctic Peninsula began around 600 years ago, the high rate of warming over the past century is unusual (but not unprecedented) in the context of natural climate variability over the past two millennia. The connection shown here between past temperature and ice-shelf stability suggests that warming for several centuries rendered ice shelves on the northeastern Antarctic Peninsula vulnerable to collapse. Continued warming to temperatures that now exceed the stable conditions of most of the Holocene epoch is likely to cause ice-shelf instability to encroach farther southward along the Antarctic Peninsula. STUDY NOTES: Deutrium (dD) data and temperature reconstruction from the James Ross Island ice core, Antarctic Peninsula, for the last 14,000 years. Data is presented on the JRI-1 Holocene age scale decribed in the methods and using the fixed time points given in Supplementary Table 1 of Mulvaney et al. 2012 An unconformity exists in the JRI ice core during the late deglacial interval and the JRI-1 age scale does not cover the portion of the ice record before this point Temperature anomalies are relative to the 1961-1990 interval and were calculated by correcting for changes in ocean isotopic composition and then applying a temperature dependence of 6.4 +/- 1.3 (s.e.m.) per mill per degree C derived in Abram et al 2011, JGR. The uncertainty window for temperature anomalies is the standard error of the isotope-temperature dependence NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Mulvaney, R. Investigator : Abram, N.J. Investigator : Hindmarsh, R.C.A. Investigator : Arrowsmith, C. Investigator : Fleet, L. Investigator : Triest, J. Investigator : Sime, L.C. Investigator : Alemany, O. Investigator : Foord, S. 2013-03-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/13954 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/james-ross-island/james-ross-island2012dd.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/james-ross-island/james-ross-island2012dd10yr.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/james-ross-island/nature11391-s2.xls https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/james-ross-island/james-ross-island2012dd100yr.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/james-ross-island/james-ross-island2012dd.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/james-ross-island/james-ross-island2012dd10yr.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/james-ross-island/nature11391-s2.xls https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/james-ross-island/james-ross-island2012dd100yr.txt English https://www.ncdc.noaa.gov/paleo/study/13954 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/james-ross-island/james-ross-island2012dd.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/james-ross-island/james-ross-island2012dd10yr.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/james-ross-island/nature11391-s2.xls https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/james-ross-island/james-ross-island2012dd100yr.txt Robert Mulvaney, Nerilie J. Abram, Richard C. A. Hindmarsh, Carol Arrowsmith, Louise Fleet, Jack Triest, Louise C. Sime, Olivier Alemany, and Susan Foord. 2012. Recent Antarctic Peninsula warming relative to Holocene climate and ice-shelf history. Nature, Vol. 489, Issue 7414, pp. 141-144, 6-September-2012. DOI: 10.1038/nature11391 START YEAR: 14263 cal yr BP * END YEAR: -60 cal yr BP -57.685 -64.2017 -57.685 -64.2017