noaa-icecore-14174 Quelccaya Ice Cap, Peru 1800 Year Oxygen Isotope, Dust, and Major Ions Data Thompson, L.G.; Mosley-Thompson, E.; Davis, M.E.; Zagorodnov, V.S.; Howat, I.M.; Mikhalenko, V.N.; Lin, P-N. Quelccaya Ice Cap, Peru 1800 Year Oxygen Isotope, Dust, and Major Ions Data 2013-04-04 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/14174 Investigator L.G. Thompson Investigator E. Mosley-Thompson Investigator M.E. Davis Investigator V.S. Zagorodnov Investigator I.M. Howat Investigator V.N. Mikhalenko Investigator P-N. Lin earth science paleoclimate ice cores ice age,null,null,year Common Era,null,ice cores,null,null,N,null earth science paleoclimate ice cores dust,bulk ice,null,count per milliliter,null,ice cores,averaged,null,N,null earth science paleoclimate ice cores sulfate,bulk ice,null,parts per billion,null,ice cores,averaged,null,N,null earth science paleoclimate climate reconstructions|ice cores age at sample start,null,null,year Common Era,null,climate reconstructions|ice cores,null,null,N,null earth science paleoclimate ice cores calcium,bulk ice,null,parts per billion,null,ice cores,averaged,null,N,null earth science paleoclimate ice cores accumulation rate,bulk ice,null,meter per year,null,ice cores,averaged,null,N,decadal average; m water equivalent/year earth science paleoclimate ice cores nitrate,bulk ice,null,parts per billion,null,ice cores,averaged,null,N,decadal average earth science paleoclimate ice cores magnesium,bulk ice,null,parts per billion,null,ice cores,averaged,null,N,decadal average earth science paleoclimate ice cores accumulation rate,bulk ice,null,meter per year,null,ice cores,null,null,N,m water equivalent/year earth science paleoclimate ice cores sodium,bulk ice,null,parts per billion,null,ice cores,averaged,null,N,null earth science paleoclimate ice cores chloride,bulk ice,null,parts per billion,null,ice cores,averaged,null,N,decadal average earth science paleoclimate ice cores ice age at sample end,null,null,year Common Era,null,ice cores,null,null,N,null earth science paleoclimate ice cores layer thickness,bulk ice,null,meter,null,ice cores,null,null,N,null earth science paleoclimate ice cores sulfate,bulk ice,null,parts per billion,null,ice cores,averaged,null,N,decadal average earth science paleoclimate ice cores fluoride,bulk ice,null,parts per billion,null,ice cores,averaged,null,N,null earth science paleoclimate ice cores calcium,bulk ice,null,parts per billion,null,ice cores,averaged,null,N,decadal average earth science paleoclimate ice cores delta 18O,bulk ice,null,per mil SMOW,null,ice cores,averaged,null,N,null earth science paleoclimate ice cores ammonium,bulk ice,null,parts per billion,null,ice cores,averaged,null,N,null earth science paleoclimate ice cores magnesium,bulk ice,null,parts per billion,null,ice cores,averaged,null,N,null earth science paleoclimate ice cores delta 18O,bulk ice,null,per mil SMOW,null,ice cores,averaged,null,N,decadal average earth science paleoclimate ice cores fluoride,bulk ice,null,parts per billion,null,ice cores,averaged,null,N,decadal average earth science paleoclimate ice cores ammonium,bulk ice,null,parts per billion,null,ice cores,averaged,null,N,decadal average earth science paleoclimate climate reconstructions|ice cores age at sample end,null,null,year Common Era,null,climate reconstructions|ice cores,null,null,N,null earth science paleoclimate ice cores nitrate,bulk ice,null,parts per billion,null,ice cores,averaged,null,N,null earth science paleoclimate ice cores potassium,bulk ice,null,parts per billion,null,ice cores,averaged,null,N,null earth science paleoclimate ice cores ice age at sample start,null,null,year Common Era,null,ice cores,null,null,N,null earth science paleoclimate ice cores dust,bulk ice,null,count per milliliter,null,ice cores,averaged,null,N,decadal average earth science paleoclimate ice cores sodium,bulk ice,null,parts per billion,null,ice cores,averaged,null,N,decadal average earth science paleoclimate climate reconstructions|ice cores sea surface temperature,null,null,degree Celsius,null,climate reconstructions|ice cores,averaged,null,N,null earth science paleoclimate ice cores chloride,bulk ice,null,parts per billion,null,ice cores,averaged,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 cores potassium,bulk ice,null,parts per billion,null,ice cores,averaged,null,N,decadal average earth science paleoclimate ice core physical properties earth science paleoclimate ice core oxygen isotopes earth science paleoclimate ice core reconstruction earth science paleoclimate ice core chemistry geoscientificInformation 200 AD 2010 AD 1750 cal yr BP -60 cal yr BP Complete -13.93 -13.93 -70.83 -70.83 5670 5670 Continent South America Peru Quelccaya Ice Cap>LATITUDE -13.93>LONGITUDE -70.83 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 Thompson, L.G., E. Mosley-Thompson, M.E. Davis, V.S. Zagorodnov, I.M. Howat, V.N. Mikhalenko, and P.-N. Lin. 2013 Science 340 6135 945-950 10.1126/science.1234210 http://www.sciencemag.org/content/340/6135/945

Ice cores from low latitudes can provide a wealth of unique information about past climate in the tropics, but they are difficult to recover and few exist. Here, we report annually resolved ice core records from the Quelccaya ice cap (5670 masl) in Peru which extend back ~1800 years and provide a high-resolution record of climate variability there. Oxygen isotopic ratios (d18O) are linked to sea-surface temperatures in the tropical eastern Pacific, while concentrations of ammonium and nitrate document the dominant role played by the migration of the Intertropical Convergence Zone in the region of the tropical Andes. Quelccaya continues to retreat and thin: Radiocarbon dates on wetland plants exposed along its retreating margins indicate it has not been smaller for at least six millennia. STUDY NOTES: Oxygen Isotope, dust and major ions data from ice cores collected on the Quelccaya Ice Cap, Peru. Data are at annual or decadal resolution for the past 1800 years. These new records are based on freshly cut ice samples; previous Quelccaya data were measured on bottled water samples. Included are Annual averages of d18O, net balance (accumulation), dust concentrations, and major ion concentrations for the Quelccaya Summit Dome (QSD) core from thermal year 226/227 to 2009/2010 CE; Decadal averages of d18O and net balance (accumulation) for the Quelccaya North Dome (QND) core from thermal year 1000/1001 to 1999/2000 CE; Decadal averages of sea surface temperatures (SSTs) in the NINO4 region from thermal year 230 to 2009/2010, reconstructed from the relationship between NINO4 SST and QSD d18O as shown in Fig S5 in the Supplementary Materials, Thompson et al. 2013; Annual layer thicknesses in Quelccaya Summit Dome core from thermal year 1000/1001 to 1899/1900 CE. These are not corrected for density or thinning. Annual layer thicknesses were determined by seasonal variations in dust and d18O, measured from high dust concentration and high d18O in successive dry seasons (austral winter). Also included are Huascaran d18O and NO3- data: d18O and nitrate from Huascaran 1993 Core 2. Decadal averages from thermal year 830/831 to 1991/1992, quasi-decadal averages from thermal year 200/201 to 829/830 CE. Huascaran decadal d18O data are from Thompson et al. (2006) PNAS, vol 103, 10,536-10,543.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/quelccaya/quelccaya2013huas.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/quelccaya/quelccaya2013nino4sst.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/quelccaya/quelccaya2013.xlsx GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/quelccaya/quelccaya2013layer-thickness.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/quelccaya/quelccaya2013nd-decadal.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/quelccaya/quelccaya2013.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/quelccaya/quelccaya2013sd-decadal.txt USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11