| Title | Lake Agassiz Final drainage event in the northwest North Atlantic |
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| Author | Hillaire-Marcel, C; de Vernal, A; Piper, D J W |
| Source | Geophysical Research Letters vol. 34, L15601, 2007, 5 pages, https://doi.org/10.1029/2007GL030396  Open Access |
| Image |  |
| Year | 2007 |
| Alt Series | Earth Sciences Sector, Contribution Series 20070249 |
| Publisher | Wiley-Blackwell |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Province | Northern offshore region; Eastern offshore region |
| Area | Labrador Sea; Labrador Margin; Labrador Shelf; Labrador Slope |
| Lat/Long WENS | -64.0000 -44.0000 60.0000 44.0000 |
| Subjects | surficial geology/geomorphology; marine geology; glacial history; glacial lakes; deglaciation; drainage; drainage systems; Holocene; sedimentary rocks; paleoclimates; oceanography; paleogeography; Lake
Agassiz; Quaternary |
| Illustrations | sketch maps; graphs |
| Program | Geoscience for Oceans Management Geohazards and Constraints to Offshore Development |
| Program | CFCAS - Canadian Foundation for Climate and Atmospheric Sciences
|
| Program | NSERC Natural Sciences and Engineering Research Council of
Canada |
| Program | Fonds québecois de la recherche sur la nature et les
technologies |
| Released | 2007 08 02 |
| Abstract | The 8.2ka "climate" event recorded in Greenland ice cores is subject of debates with respect to causal linkage with a collapse of the Atlantic Meridional Overturning due to the drainage of the
late-glacial lake Agassiz.Here, we present records from the NW North Atlantic, down-current the flood discharge route, showing that the 9.5 - 8 ka interval was marked by a succession of events. The drainage itself corresponds to a twin-layer of
carbonate-rich turbidites deposited within the calibrated 8.35 - 8.5 ka interval. Proxies of sea-surface and deep-current conditions do not indicate significant concomitant changes in the NW North Atlantic. The dataset, however, supports the concept
that the 8.2ka "climate" event may represent one of the manifestations of climate instability during an interval with major changes of land drainage in NE America, due to the collapse of the Laurentide Ice Sheet, subsequent fast sea level rise and
large scale reorganization of the North Atlantic thermohaline circulation pattern. |
| GEOSCAN ID | 224268 |
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