200 years of isotope and chemical records in a firn core from Hercules Névé, northern Victoria Land, Antarctica

noaa-icecore-22401 Hercules Nèvé, Antarctica 220 Year Ice Core d18O and Accumulation Data Stenni, B.; Caprioli, R.; Cimino, L.; Cremisini, C.; Flora, O.; Gragnani, R.; Longinelli, A.; Maggi, V.; Torcini, S. Hercules Nèvé, Antarctica 220 Year Ice Core d18O and Accumulation Data 2017-07-18 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/22401 Investigator B. Stenni Investigator R. Caprioli Investigator L. Cimino Investigator C. Cremisini Investigator O. Flora Investigator R. Gragnani Investigator A. Longinelli Investigator V. Maggi Investigator S. Torcini earth science paleoclimate ice cores delta 18O,bulk ice,null,per mil SMOW,null,ice cores,null,isotope ratio mass spectrometry,N,uncertainty 0.05 per mil earth science paleoclimate ice cores accumulation rate,bulk ice,null,kilogram per square meter per year,null,ice cores,null,null,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 accumulation earth science paleoclimate ice core oxygen isotopes geoscientificInformation 1770 AD 1992 AD 180 cal yr BP -42 cal yr BP Complete -73.1 -73.1 165.4 165.4 2960 2960 Continent Antarctica Hercules Névé>LATITUDE -73.1>LONGITUDE 165.4 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 B. Stenni, R. Caprioli, L. Cimino, C. Cremisini, O. Flora, R. Gragnani, A. Longinelli, V. Maggi and S. Torcini 1999 200 years of isotope and chemical records in a firn core from Hercules Névé, northern Victoria Land, Antarctica Annals of Glaciology 29 106-112 https://www.igsoc.org/annals/29/

A 42.2 m firn core was collected at the Hercules Nèvé Plateau (100 km inland and 2960 m a.s.l.) in Northern Victoria Land, during the 1994-95 Italian Antarctic Expedition. Chemical (Cl-, NO3-, SO4-2 and H2O2) and isotope (d18O) analyses were performed to evaluate the snow-accumulation rate at this site. Tritium measurements were performed in the upper part of the core in order to narrow down the dating of the core. High nss SO4-2 concentrations seem to be related to some explosive volcanic eruptions, such as Tambora (1815) and the preceding event called "Unknown" (A.D. 1809), Coseguina (A.D. 1835), Makjan (A.D. 1861), Krakatoa (A.D. 1883) and Tarawera (A.D. 1886). A comparison between the seasonal variations observed in the isotope and chemical profiles was carried out in order to reduce the dating uncertainty, using the tritium and the volcanic markers as time constraints. A deposition period of 222 years was thus determined. The 3 year smoothed d18O profile shows more negative values from the bottom of the core (dated A.D. 1770) throughout all the 19th century, suggesting 'cooler' conditions in agreement with other East Antarctic ice-core records. Subsequently, a general increase in d18O values is observed. The calculated average snow-accumulation rates between the above-mentioned time markers are 111-129 kg m-2 a-1. STUDY NOTES: Herlules Névé, Antarctica ice core d18O and accumulation data for the past 220 years.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/hercules/hercules1999accum.txt Formatted Text Data File; Hercules Nèvé Ice Core Accumulation Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/hercules/hercules1999d18o.txt Formatted Text Data File; Hercules Nèvé Ice Core d18O Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11