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TitleNeoglacial ice expansion and late Holocene cold-based ice cap dynamics on Cumberland Peninsula, Baffin Island, Arctic Canada
AuthorMargreth, A; Dyke, A S; Gosse, J C; Telka, A M
SourceQuaternary Science Reviews vol. 91, 2014 p. 242-256,
LinksSupplement (PDF 1.05 MB)
Alt SeriesEarth Sciences Sector, Contribution Series 20140119
PublisherElsevier BV
Mediapaper; on-line; digital
File formatpdf
NTS16E; 16L; 25H; 26I
AreaCumberland Peninsula; Baffin Island
Lat/Long WENS-65.0000 -63.0000 67.0000 65.0000
Subjectsgeochronology; paleontology; radiocarbon dates; fossils; Holocene; sea ice; ice; climatic fluctuations; flora; vegetation; cores; Medieval Warm Period; Quaternary
ProgramGEM: Geo-mapping for Energy and Minerals Multiple Metals - Cumberland Peninsula (Baffin Island, Nunavut)
AbstractRadiocarbon dating of fossil flora and fauna collected along receding cold-based ice caps and cold-based sections of polythermal glaciers on Cumberland Peninsula reveal insights into Neoglacial ice expansion and late Holocene ice dynamics. The taphonomic advantages of subfossilized moss were exploited to precisely document regional expansions of ice caps through the late Holocene. When compared with climate proxies and records of volcanic eruptions, the moss radiocarbon age distributions indicate i) onset of Neoglaciation shortly after 5 ka, concomitant with increased sea ice cover, ii) intensification of ice expansion between 1.9 and 1.1 ka, followed by halt of ice growth, or ice recession during the Medieval Warm Period, and iii) renewed ice expansion after 0.8 ka, in response to cooling related to a combination of large volcanic eruptions and low solar activity. Overall, the observations support a model of near-instantaneous glacial response to regional climate controls and that these responses were synchronous throughout eastern Canadian Arctic and possibly eastern Greenland.

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