noaa-icecore-22476 Law Dome Ice Core 1,800 Year Oxygen Isotope Data Plummer, C.T.; Curran, M.A.J.; van Ommen, T.D.; Rasmussen, S.O.; Moy, A.D.; Vance, T.; Clausen, H.B.; Vinther, B.M.; Mayewski, P.A. Law Dome Ice Core 1,800 Year Oxygen Isotope Data 2017-05-19 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/22476 Investigator C.T. Plummer Investigator M.A.J. Curran Investigator T.D. van Ommen Investigator S.O. Rasmussen Investigator A.D. Moy Investigator T. Vance Investigator H.B. Clausen Investigator B.M. Vinther Investigator P.A. Mayewski earth science paleoclimate ice cores delta 18O,bulk ice,null,per mil SMOW,null,ice cores,null,isotope ratio mass spectrometry,N,null earth science paleoclimate ice cores age,null,null,year Common Era,null,ice cores,null,null,N,null earth science paleoclimate ice core oxygen isotopes geoscientificInformation 173 AD 1995 AD 1777 cal yr BP -45 cal yr BP Complete -66.73 -66.73 112.83 112.83 1390 1390 Continent Antarctica Law Dome>LATITUDE -66.73>LONGITUDE 112.83 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 C.T. Plummer, M.A.J. Curran, T.D. van Ommen, S.O. Rasmussen, A.D. Moy, T.R. Vance, H.B. Clausen, B.M. Vinther, and P.A. Mayewski 2012 Climate of the Past 8 6 1929-1940 10.5194/cp-8-1929-2012 https://www.clim-past.net/8/1929/2012/

Volcanic eruptions are an important cause of natural climate variability. In order to improve the accuracy of climate models, precise dating and magnitude of the climatic effects of past volcanism are necessary. Here we present a 2000-yr record of Southern Hemisphere volcanism recorded in ice cores from the high accumulation Law Dome site, East Antarctica. The ice cores were analysed for a suite of chemistry signals and are independently dated via annual layer counting, with 11 ambiguous years at 23 BCE, which has presently the lowest error of all published long Antarctic ice cores. Independently dated records are important to avoid circular dating where volcanic signatures are assigned a date from some external information rather than using the date it is found in the ice core. Forty-five volcanic events have been identified using the sulphate chemistry of the Law Dome record. The low dating error and comparison with the NGRIP (North Greenland Ice Core Project) volcanic records (on the GICC05 timescale) suggest Law Dome is the most accurately dated Antarctic volcanic dataset, which will improve the dating of individual volcanic events and potentially allow better correlation between ice core records, leading to improvements in global volcanic forcing datasets. One of the most important volcanic events of the last two millennia is the large 1450s CE event, usually assigned to the eruption of Kuwae, Vanuatu. In this study, we review the evidence surrounding the presently accepted date for this event, and make the case that two separate eruptions have caused confusion in the assignment of this event. Volcanic sulphate deposition estimates are important for modelling the climatic response to eruptions. The largest volcanic sulphate events in our record are dated at 1458 CE (Kuwae?, Vanuatu), 1257 and 422 CE (unidentified). STUDY NOTES: Annual oxygen isotope (d18O) data from the Law Dome ice core, East Antarctica for 173 - 1995 CE.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2012d18o.txt Formatted Text Data File; Law Dome Ice Core d18O Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11