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. Thompson, L.G. Mosley-Thompson, E. Davis, M.E. Zagorodnov, V.S. Howat, I.M. Mikhalenko, V.N. Lin, P-N. 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 earth science/paleoclimate/ice core earth science/paleoclimate/ice core earth science/paleoclimate/ice core (Quelccaya Ice Cap>LATITUDE -13.93>LONGITUDE -70.83) 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. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Thompson, L.G. Investigator : Mosley-Thompson, E. Investigator : Davis, M.E. Investigator : Zagorodnov, V.S. Investigator : Howat, I.M. Investigator : Mikhalenko, V.N. Investigator : Lin, P-N. 2013-04-04 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/14174 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/quelccaya/quelccaya2013huas.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/quelccaya/quelccaya2013nino4sst.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/quelccaya/quelccaya2013.xlsx https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/quelccaya/quelccaya2013layer-thickness.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/quelccaya/quelccaya2013nd-decadal.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/quelccaya/quelccaya2013.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/quelccaya/quelccaya2013sd-decadal.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/quelccaya/quelccaya2013huas.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/quelccaya/quelccaya2013nino4sst.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/quelccaya/quelccaya2013.xlsx https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/quelccaya/quelccaya2013layer-thickness.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/quelccaya/quelccaya2013nd-decadal.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/quelccaya/quelccaya2013.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/quelccaya/quelccaya2013sd-decadal.txt English https://www.ncdc.noaa.gov/paleo/study/14174 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/quelccaya/quelccaya2013huas.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/quelccaya/quelccaya2013nino4sst.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/quelccaya/quelccaya2013.xlsx https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/quelccaya/quelccaya2013layer-thickness.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/quelccaya/quelccaya2013nd-decadal.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/quelccaya/quelccaya2013.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/quelccaya/quelccaya2013sd-decadal.txt Thompson, L.G., E. Mosley-Thompson, M.E. Davis, V.S. Zagorodnov, I.M. Howat, V.N. Mikhalenko, and P.-N. Lin.2013Annually Resolved Ice Core Records of Tropical Climate Variability Over the Past ~1800 YearsScience3406135945-95010.1126/science.1234210http://www.sciencemag.org/content/340/6135/945 START YEAR: 200 AD * END YEAR: 2010 AD -70.83 -13.93 -70.83 -13.93