noaa-lake-16379 Asynchronous Little Ice Age glacier fluctuations in Iceland and European Alps linked to shifts in subpolar North Atlantic circulation Larsen, D.J.; Miller, G.H.; Geirsdóttir, A. Asynchronous Little Ice Age glacier fluctuations in Iceland and European Alps linked to shifts in subpolar North Atlantic circulation 2013-01-01 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/16379 Investigator D.J. Larsen Investigator G.H. Miller Investigator A. Geirsdóttir earth science paleoclimate paleolimnology sedimentation rate,sediment,null,centimeter per year,null,paleolimnology,averaged,null,N,seismic interpolated mean earth science paleoclimate paleolimnology ice rafted debris,sediment,null,count,null,paleolimnology,null,null,N,size fraction >= 2mm earth science paleoclimate paleolimnology varve thickness,null,null,centimeter,null,paleolimnology,averaged,null,N,null earth science paleoclimate paleolimnology age,null,null,year Common Era,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology sedimentation rate,sediment,null,centimeter per year,null,paleolimnology,averaged,null,N,decadal mean earth science paleoclimate paleolimnology sedimentation rate,sediment,null,centimeter per year,null,paleolimnology,averaged,null,N,interval mean earth science paleoclimate paleolimnology physical properties geoscientificInformation Arctic Little Ice Age (LIA) 860 AD 2000 AD 1090 cal yr BP -50 cal yr BP Complete 64.61897 64.64588 -19.85912 -19.83328 422 422 Continent Europe Northern Europe Iceland Lake Hvítárvatn10-7>LATITUDE 64.61897>LONGITUDE -19.83943 Continent Europe Northern Europe Iceland Lake Hvítárvatn09-6>LATITUDE 64.63483>LONGITUDE -19.84962 Continent Europe Northern Europe Iceland Lake Hvítárvatn03-3>LATITUDE 64.63805>LONGITUDE -19.85912 Continent Europe Northern Europe Iceland Lake Hvítárvatn03-1>LATITUDE 64.64172>LONGITUDE -19.83995 Continent Europe Northern Europe Iceland Lake Hvítárvatn03-2>LATITUDE 64.64305>LONGITUDE -19.84928 Continent Europe Northern Europe Iceland Lake Hvítárvatn03-4>LATITUDE 64.64588>LONGITUDE -19.83328 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 Larsen, D.J., Miller, G.H., Geirsdottir, A. 2013 Earth and Planetary Science Letters 380 52 - 59

Records of past glacier fluctuations are an important source of paleoclimate data and provide context for future changes in global ice volume. In the North Atlantic region, glacier chronologies can be used to track the response of terrestrial environments to variations in marine conditions including circulation patterns and sea ice cover. However, the majority of glacier records are discontinuous and temporally restricted, owing in part to the extensive advance of Northern Hemisphere glaciers during the Little Ice Age (LIA), the most recent and severe climate anomaly of the Neoglacial period. Here, we combine an absolutely dated and continuous record of Langjökull ice marginal fluctuations with new reconstructions of sediment flux through the past 1.2 ka using varved sediments from Hvítárvatn, a proglacial lake in Iceland’s central highlands. Large spatial and temporal variations in sediment flux related to changing ice cap dimensions are reconstructed from six sediment cores and seismic reflection profiles. Sediment data reveal two discrete phases of ice expansion occurring ca. 1400 to 1550 AD and ca. 1680 to 1890 AD. These advances are separated by a persistent interval of ice retreat, suggesting that a substantial period of warming interrupted LIA cold. The pattern of Icelandic glacier activity contrasts with that of European glaciers but shows strong similarities to reconstructed changes in North Atlantic oceanographic conditions, indicating differing regional responses to coupled ocean–atmosphere–sea ice variations. Our data suggest that subpolar North Atlantic circulation dynamics may have led to coherent asynchronous glacier fluctuations during the mid LIA and highlight the importance of circulation variability in triggering and transmitting multidecadal scale climate changes to nearby terrestrial environments. STUDY NOTES: Keywords, Iceland, Little Ice Age, glacier fluctuations, sediment yield, varves, NAO, AMOC, subpolar gyre, Arctic sea ice

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/iceland/hvitarvatn2013-6core-means.txt Data: Varve thickness, six-core means; hvitarvatn2013-10-7-thickness.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/iceland/hvitarvatn2013-03-2-ird.txt Data: Ice rafted debris, core hvitarvatn2013-03-2-ird; hvitarvatn2013-03-2-ird.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/iceland/hvitarvatn2013-10-7-ird.txt Data: Ice rafted debris, core hvitarvatn2013-10-7-ird; hvitarvatn2013-10-7-ird.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/iceland/hvitarvatn2013-09-6-ird.txt Data: Ice rafted debris, core hvitarvatn2013-09-6-ird; hvitarvatn2013-09-6-ird.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/iceland/hvitarvatn2013-03-3-thickness.txt Data: Varve thickness, core hvitarvatn2013-03-3-thickness.txt; hvitarvatn2013-03-3-thickness.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/iceland/hvitarvatn2013-09-6-thickness.txt Data: Varve thickness, core hvitarvatn2013-09-6-thickness; hvitarvatn2013-09-6-thickness.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/iceland/hvitarvatn2013-10-7-thickness.txt Data: Varve thickness, core hvitarvatn2013-10-7-thickness; hvitarvatn2013-10-7-thickness.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/iceland/hvitarvatn2013-03-1-ird.txt Data: Ice rafted debris, core hvitarvatn2013-03-1-ird; hvitarvatn2013-03-1-ird.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/iceland/hvitarvatn2013-03-2-thickness.txt Data: Varve thickness, core hvitarvatn2013-03-2-thickness.txt; hvitarvatn2013-03-2-thickness.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/iceland/hvitarvatn2013-03-1-thickness.txt Data: Varve thickness, core hvitarvatn2013-03-1-thickness; hvitarvatn2013-03-1-thickness.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/iceland/hvitarvatn2013-03-3-ird.txt Data: Ice rafted debris, core hvitarvatn2013-03-3-ird; hvitarvatn2013-03-3-ird.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/iceland/hvitarvatn2013-03-4-thickness.txt Data: Varve thickness, core hvitarvatn2013-03-4-thickness; hvitarvatn2013-03-4-thickness.txt USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11