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245 00 |a Ice-shelf collapse from subsurface warming as a trigger for Heinrich events |h [electronic resource] |y English.
260        |a [S.l.] : |b National Academy of Sciences, |c 2011.
490        |a Proceedings of the National Academy of Sciences Early Edition |y English.
506        |a Please contact the owning institution for licensing and permissions. It is the user's responsibility to ensure use does not violate any third party rights.
520 3    |a Episodic iceberg-discharge events from the Hudson Strait Ice Stream (HSIS) of the Laurentide Ice Sheet, referred to as Heinrich events, are commonly attributed to internal ice-sheet instabilities, but their systematic occurrence at the culmination of a large reduction in the Atlantic meridional overturning circulation (AMOC) indicates a climate control. We report Mg/Ca data on benthic foraminifera from an intermediate-depth site in the northwest Atlantic and results from a climate-model simulation that reveal basin-wide subsurface warming at the same time as large reductions in the AMOC, with temperature increasing by approximately 2 °C over a 1–2 kyr interval prior to a Heinrich event. In simulations with an ocean model coupled to a thermodynamically active ice shelf, the increase in subsurface temperature increases basal melt rate under an ice shelf fronting the HSIS by a factor of approximately 6. By analogy with recent observations in Antarctica, the resulting ice-shelf loss and attendant HSIS acceleration would produce a Heinrich event.
533        |a Electronic reproduction. |c Florida International University, |d 2015. |f (dpSobek) |n Mode of access: World Wide Web. |n System requirements: Internet connectivity; Web browser software.
650    0 |a Climate Change.
650    0 |a Ice Shelves.
650    0 |a Icebergs.
650    0 |a Paleoclimatology.
700 1    |a Marcott, Shaun A..
700 1    |a Clark, Peter U..
700 1    |a Padman, Laurie.
700 1    |a Klinkhammer, Gary P..
700 1    |a Springer, Scott R..
700 1    |a Liu, Zhengyu.
700 1    |a Otto-Bliesner, Bette L..
700 1    |a Carlson, Anders E..
700 1    |a Ungerer, Andy.
700 1    |a Padman, June.
700 1    |a He, Feng.
700 1    |a Cheng, Jun.
700 1    |a Schmittner, Andreas.
830    0 |a dpSobek.
830    0 |a Sea Level Rise.
852        |a dpSobek |c Sea Level Rise
856 40 |u http://dpanther.fiu.edu/dpService/dpPurlService/purl/FI15062115/00001 |y Click here for full text
992 04 |a http://dpanther.fiu.edu/sobek/content/FI/15/06/21/15/00001/FI15062115_thm.jpg
997        |a Sea Level Rise


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