noaa-icecore-20350 Bruce Plateau, Antarctic Peninsula 100yr Ice Core d18O and Accumulation Goodwin, B.P.; Mosley-Thompson, E.; Wilson, A.B.; Porter, S.E.; Sierra-Hernandez, M.R. Bruce Plateau, Antarctic Peninsula 100yr Ice Core d18O and Accumulation 2016-07-22 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/20350 Investigator B.P. Goodwin Investigator E. Mosley-Thompson Investigator A.B. Wilson Investigator S.E. Porter Investigator M.R. Sierra-Hernandez earth science paleoclimate ice cores ice age,null,null,year Common Era,null,ice cores,null,null,N,null earth science paleoclimate ice cores accumulation rate,bulk ice,null,meter per year,null,ice cores,null,null,N,annual counting by (MSA); meters of water equivalent earth science paleoclimate ice cores delta 18O,bulk ice,null,per mil SMOW,null,ice cores,averaged,cavity ring-down spectroscopy,N,annual averages earth science paleoclimate ice core accumulation earth science paleoclimate ice core oxygen isotopes geoscientificInformation Pacific Decadal Oscillation Southern Annular Mode (SAM) 1900 AD 2009 AD 50 cal yr BP -59 cal yr BP Complete -66.038 -66.038 -64.078 -64.078 1976 1976 Continent Antarctica Bruce Plateau>LATITUDE -66.038>LONGITUDE -64.078 None Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

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Boulder CO 80305-3328 USA online ASCII Bradley P. Goodwin, Ellen Mosley-Thompson, Aaron B. Wilson, Stacy E. Porter, M. Roxana Sierra-Hernandez 2016 Journal of Climate 29 7 2579-2596 10.1175/JCLI-D-15-0354.1 http://journals.ametsoc.org/doi/full/10.1175/JCLI-D-15-0354.1

A new ice core drilled in 2010 to bedrock from the Bruce Plateau (BP) on the Antarctic Peninsula (AP) provides a high temporal resolution record of environmental conditions in this region. The extremely high annual accumulation rate at this site facilitates analysis of the relationships between annual net accumulation An on the BP and large-scale atmospheric oscillations. Over the last ~45 years, An on the BP has been positively correlated with both the southern annular mode (SAM) and Southern Oscillation index (SOI). Extending this analysis back to 1900 reveals that these relationships are not temporally stable, and they exhibit major shifts in the late-1940s and the mid-1970s that are contemporaneous with phase changes in the Pacific decadal oscillation (PDO). These varying multidecadal characteristics of the An-oscillation relationships are not apparent when only data from the post-1970s era are employed. Analysis of the longer ice core record reveals that the influence of the SAM on An depends not only on the phase of the SAM and SOI but also on the phase of the PDO. When the SAM's influence on BP An is reduced, such as under negative PDO conditions, BP An is modulated by variability in the tropical and subtropical atmosphere through its impacts on the strength and position of the circumpolar westerlies in the AP region. These results demonstrate the importance of using longer-term ice core-derived proxy records to test conventional views of atmospheric circulation variability in the AP region. STUDY NOTES: Antarctic Peninsula oxygen isotope (d18O) and accumulation rate data from an ice core drilled on Bruce Plateau.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/bruce/bruce2016accum.txt Data File; Bruce Plateau Ice Core Annual Net Accumulation GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/bruce/bruce2016d18o.txt Data File; Bruce Plateau Ice Core d18O USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11