noaa-lake-25610 Database of Arctic Holocene Temperature Records McKay, N.P.; Kaufman, D.S. Database of Arctic Holocene Temperature Records 2018-11-09 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/25610 Investigator N.P. McKay Investigator D.S. Kaufman earth science paleoclimate paleolimnology reconstruction geoscientificInformation Air Temperature Reconstruction Complete 60 90 -180 180 Geographic Region Arctic Arctic>LATITUDE >LONGITUDE 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 McKay, N.P., Kaufman, D.S., Routson, C.C., Erb, M.P., and Zander, P.D. 2018 Geophysical Research Letters 45 21 1-10 10.1029/2018GL079773

The middle to late Holocene (8,200 years ago to present) in the Arctic is characterized by cooling temperatures and the regrowth and advance of glaciers. Whether this Neoglaciation was a threshold response to linear cooling, or was driven by a regional or Arctic-wide acceleration of cooling, is unknown. Here we examine the largest-yet-compiled multiproxy database of Arctic Holocene temperature change, along with model simulations, to investigate regional and Arctic-wide increases in cooling rate, the synchronicity of Neoglacial onset, and the observed and simulated rates of temperature change. We find little support for an Arctic-wide onset of Neoglacial cooling but do find intervals when regions experienced rapid increases in long-term cooling rate, both in the observations and in climate model simulations. In the model experiments, Neoglacial cooling is associated with indirectly forced millennial-scale variability in meridional heat transport superposed on the long-term decline of summer insolation. STUDY NOTES: Provided Keywords: air temperature, ice elevation

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/arctic/mckay2018/lipdfiles/ Data Folder; LiPD Data Files Used in Study GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/arctic/mckay2018/mckay2018-RecordsUsedMetadata.txt NOAA Template File; Metadata for Records Used in Synthesis GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/arctic/mckay2018/mckay2018-metadata.txt NOAA Template File; Arctic Study Metadata GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/arctic/mckay2018/prob_density/ Data Folder; Probability Density Data from Figure 2 in publication USA/NOAA DIF Version 9.8.4 2019-03-27 2019-03-27