Enter Note Done
Go to previous page in this tab
Session
  • Presentation | PP43B: Reconstructing Past Sea Level and Ice Sheets over Glacial Cycles II Oral
  • Oral
  • Share Icon
    Map Icon
    Bookmark Icon
  • PP43B-02: Episodic Eastern Canadian Arctic Holocene snowline decline and the aborted onset of continental glaciation ~1960 CE
    • Schedule
    Notes
  • Location Icon211-213
    NOLA CC
    Set Timezone
    •  
    View Map

Generic 'disconnected' Message
Author(s):
Gifford Miller, University of Colorado at Boulder (First Author, Presenting Author)
Nicolas Young, Columbia University, Lamont-Doherty Earth Observatory
Jonathan Raberg, University of Colorado at Boulder
Simon Pendleton, Plymouth State University
Martha Raynolds, University of Alaska Fairbanks
Helga Bültmann, Institute of Biology and Biotechnology of Plants, Münster University


More than 500 radiocarbon dates on tundra plants killed by expanding glaciers across Baffin Island, Eastern Canadian Arctic, define glacier response to declining summer insolation through the Holocene, with the coldest century between 1750 and 1850 CE. Between 3 and 2 thousand years ago the declining snowline intercepted the remnant Laurentide Ice Sheet, turning its mass balance positive, and initiating 'The Next Ice Age'. The new Laurentide Ice Sheet reached maximum dimensions ~1960 CE, when the 'Next Ice Age' was terminated by warming summers resulting from the additional anthropogenic greenhouse gases. The regional snowline is now >1600 m above its 1800 CE level.



Scientific Discipline
Neighborhood
Type
Main Session
Discussion