The 8.2 ka cooling event caused by Laurentide ice saddle collapse
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چکیده
منابع مشابه
Parallel climate and vegetation responses to the early Holocene collapse of the Laurentide Ice Sheet
Parallel changes in lake-level and pollen data show that the rapid decline of the Laurentide Ice Sheet (LIS) between 10,000 and 8000 cal yr BP triggered a step-like change in North American climates: from an ice-sheet-and-insolation-dominated climate to a climate primarily controlled by insolation. Maps of the lake-level data from across eastern North America show a reorganization of climate pa...
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Brief Communication: Can recent ice discharges following the Larsen-B ice-shelf collapse be used to infer the driving mechanisms of millennial-scale variations of the Laurentide ice sheet? J. Alvarez-Solas, A. Robinson, and C. Ritz Dpto. Astrof́ısica y Ciencias de la Atmósfera, Universidad Complutense, Madrid, Spain Laboratoire des Sciences du Climat et de l’Environnement (LSCE)-UMR8212, France ...
متن کاملGlacier extent during the Younger Dryas and 8.2-ka event on Baffin Island, Arctic Canada.
Greenland ice cores reveal that mean annual temperatures during the Younger Dryas (YD) cold interval--about 12.9 to 11.7 thousand years ago (ka)--and the ~150-year-long cold reversal that occurred 8.2 thousand years ago were ~15° and 3° to 4°C colder than today, respectively. Reconstructing ice-sheet response to these climate perturbations can help evaluate ice-sheet sensitivity to climate chan...
متن کاملYounger Dryas Interval and Outflow from the Laurentide Ice Sheet
A boxmodel of the Great Lakes is used to estimate meltwater flow into the North Atlantic between 8000 and 14,000 calendar years B.P. Controls on the model include the oxygen isotopic composition of meltwaters and lake waters as measured in the shells of ostracodes. Outflow rates are highest when oxygen isotopic values of the lake waters are most negative, denoting a maximum glacial meltwater co...
متن کاملKeewatin Ice Sheet—Re-evaluation of the traditional concept of the Laurentide Ice Sheet
Patterns of dispersal of distinctive Proterozoic and Paleozoic erratics across terrain formed on Archean and Aphebian crystalline rocks indicate that (1) ice never f lowed from Hudson Bay into Keewatin in the region from the Manitoba border (lat 6 0 ° N ) northward at least to lat 65°N; (2) westward-southwestward f low out of the bay, probably from a Labradorean dispersal center, interfaced wit...
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ژورنال
عنوان ژورنال: Earth and Planetary Science Letters
سال: 2017
ISSN: 0012-821X
DOI: 10.1016/j.epsl.2017.06.011