noaa-icecore-2435 Quelccaya Ice Cap - Particle, d18O, and Accumulation Data Thompson, L.G.; Mosley-Thompson, E.; Grootes, P.M.; Pourchet, M. Quelccaya Ice Cap - Particle, d18O, and Accumulation Data 1993-12-09 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/2435 Investigator L.G. Thompson Investigator E. Mosley-Thompson Investigator P.M. Grootes Investigator M. Pourchet earth science paleoclimate ice cores ice age,null,null,year Common Era,null,ice cores,null,null,N,null earth science paleoclimate ice cores particles,bulk ice,null,count per milliliter,null,ice cores,null,electric sensing particle size analysis,N,>1.59 micrometers earth science paleoclimate ice cores electrical conductivity,bulk ice,null,microsiemens per centimeter,null,ice cores,null,null,N,null earth science paleoclimate ice cores accumulation rate,bulk ice,null,standard deviation unit,null,ice cores,normalized,null,N,null earth science paleoclimate ice cores accumulation rate,bulk ice,null,meter per year,null,ice cores,null,null,N,null earth science paleoclimate ice cores particles,bulk ice,null,count per milliliter,null,ice cores,null,electric sensing particle size analysis,N,>0.63 micrometers earth science paleoclimate ice cores particles,bulk ice,null,count per milliliter,null,ice cores,null,electric sensing particle size analysis,N,0.63-0.80 micrometers earth science paleoclimate ice cores delta 18O,bulk ice,null,per mil SMOW,null,ice cores,null,null,N,null earth science paleoclimate ice core accumulation earth science paleoclimate ice core mineralogy earth science paleoclimate ice core oxygen isotopes geoscientificInformation PAGES 2k Network PAGES LOTRED SA2k 470 AD 1984 AD 1480 cal yr BP -34 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 L. G. Thompson, E. Mosley-Thompson, P. M. Grootes, M. Pourchet, S. Hastenrath 1984 Journal of Geophysical Research: Atmospheres 89 D3 4638-4646 10.1029/JD089iD03p04638 http://onlinelibrary.wiley.com/enhanced/doi/10.1029/JD089iD03p04638/

The objective of this work is to evaluate the potential of tropical glaciers and ice caps for the reconstruction of past climatic conditions by the analysis of firn and ice cores. Samples were collected in pits and from cores retrieved on three snow fields in the South American Andes: Quelccaya Ice Cap and Huascarán in Peru and Chimborazo in Ecuador. These are compared with results from west Africa and Indonesia. Measurements include the microparticle concentration, oxygen isotopic abundance ratios, and total beta radioactivity, which in polar regions often exhibit seasonal depositional cycles. Annual variations in these three parameters are fairly well defined on Quelccaya and Huascarán and are apparently absent on Chimborazo. The Quelccaya Ice Cap contains the best preserved annual signal for all three parameters and, although in some instances the annual cycle is difficult to distinguish, the measurement of more than one stratigraphic parameter aids in the interpretation of the firn core records. The relatively flat bottom topography under Quelccaya suggests a simple ice flow regime, and depth-age calculations indicate that an ice core to bedrock should contain a record of 600 to 1300 years. This inference was confirmed by drilling to bedrock in 1983. This investigation of tropical glaciers indicates that the Quelccaya Ice Cap on the eastern edge of the Peruvian Andes has excellent potential to contain a lengthy and interpretable record of climatic conditions within the tropics of South America. STUDY NOTES: Additional References: Thompson, L.G., E. Mosley-Thompson and Benjamin Morales Arnao. 1984. Major El Nino/Southern Oscillation events recorded in stratigraphy of the tropical Quelccaya Ice Cap. Science, 226 (4670), 50-52. Thompson, L. G., E. Mosley-Thompson, J. F. Bolzan and B. R. Koci. 1985. A 1500 year record of tropical precipitation recorded in ice cores from the Quelccaya Ice Cap, Peru. Science, 229(4717), 971-973

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/quelccaya/readme_quelccaya.txt More Information; Quelccaya Data Readme File GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/quelccaya/q83summ.txt Data File; Quelccaya Summit Core Particles, d18O, Conductivity, and Accumulation Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/quelccaya/fieldcon.txt Data File; Conductivity Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/quelccaya/quelccaya1992.xls Excel Data File; Quelccaya Particles, d18O, Conductivity, and Accumulation Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/quelccaya/q83cor1.txt Data File; Quelccaya Core 1 Particles, d18O, Conductivity, and Accumulation Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11