noaa-lake-6195 Lower Murray Lake, Ellesmere Island 5000 Year Varve Thickness Data Cook, T.L.; Bradley, R.S.; Stoner, J.S.; Francus, P. Lower Murray Lake, Ellesmere Island 5000 Year Varve Thickness Data 2008-11-01 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/6195 Investigator T.L. Cook Investigator R.S. Bradley Investigator J.S. Stoner Investigator P. Francus earth science paleoclimate paleolimnology varve thickness,sediment,null,dimensionless,null,paleolimnology,averaged|normalized,null,N,null earth science paleoclimate paleolimnology density,sediment,null,gram per cubic centimeter,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology accumulation rate,sediment,null,gram per square centimeter per year,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology age,null,null,year Common Era,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology varve thickness,sediment,null,centimeter,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology accumulation rate,sediment,null,dimensionless,null,paleolimnology,averaged|normalized,null,N,null earth science paleoclimate paleolimnology varve thickness,sediment,null,centimeter,null,paleolimnology,corrected,null,N,corrected for turbidites earth science paleoclimate paleolimnology physical properties geoscientificInformation PAGES 2k Network PAGES Arctic 2k 5186 cal yr BP -54 cal yr BP Complete 81.3333 81.3333 -69.5 -69.5 106 106 Continent North America Canada Nunavut Lower Murray Lake>LATITUDE 81.3333>LONGITUDE -69.5 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 Cook, T.L., R.S. Bradley, J. S. Stoner, and P. Francus 2009 Journal of Paleolimnology 41 1 77-94 10.1007/s10933-008-9252-0

Sediments in Lower Murray Lake, northern Ellesmere Island, Nunavut Canada (81deg21'N, 69deg32'W) contain annual laminations (varves) that provide a record of sediment accumulation through the past 5000+ years. Annual mass accumulation was estimated based on measurements of varve thickness and sediment bulk density. Comparison of Lower Murray Lake mass accumulation with instrumental climate data, long-term records of climatic forcing mechanisms and other regional paleoclimate records suggests that lake sedimentation is positively correlated with regional melt season temperatures driven by radiative forcing. The temperature reconstruction suggests that recent temperatures are ~2.6C higher than minimum temperatures observed during the Little Ice Age, maximum temperatures during the past 5200 years exceeded modern values by ~0.6C, and that minimum temperatures observed approximately 2900 varve years BC were ~3.5C colder than recent conditions. Recent temperatures were the warmest since the fourteenth century, but similar conditions existed intermittently during the period spanning ~4000-1000 varve years ago. A highly stable pattern of sedimentation throughout the period of record supports the use of annual mass accumulation in Lower Murray Lake as a reliable proxy indicator of local climatic conditions in the past. STUDY NOTES: Varve thickness, density, and accumulation rate data for Lower Murray Lake, Ellesmere Island, Canada, for the last 5,000 years.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/ellesmere/lower-murray2008.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/ellesmere/lower-murray2008.xls USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11