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Research Article| March 01, 2010 Timing and magnitude of the sea-level jump preluding the 8200 yr event Marc P. Hijma; Marc P. Hijma * 1Department of Physical Geography, Faculty of Geosciences, Utrecht University, P.O. Box 80.115, 3508 TC Utrecht, Netherlands2Deltares Subsurface and Groundwater Systems—TNO Geological Survey of the Netherlands, P.O. Box 85.467, 3508 TC Utrecht, Netherlands *Current address: Faculty of Archaeology, Leiden University, Reuvensplaats 3, NL-2311 BE, Leiden, Netherlands; E-mail: m.p.hijma@umail.leidenuniv.nl. Search for other works by this author on: GSW Google Scholar Kim M. Cohen Kim M. Cohen 1Department of Physical Geography, Faculty of Geosciences, Utrecht University, P.O. Box 80.115, 3508 TC Utrecht, Netherlands2Deltares Subsurface and Groundwater Systems—TNO Geological Survey of the Netherlands, P.O. Box 85.467, 3508 TC Utrecht, Netherlands Search for other works by this author on: GSW Google Scholar Author and Article Information Marc P. Hijma * 1Department of Physical Geography, Faculty of Geosciences, Utrecht University, P.O. Box 80.115, 3508 TC Utrecht, Netherlands2Deltares Subsurface and Groundwater Systems—TNO Geological Survey of the Netherlands, P.O. Box 85.467, 3508 TC Utrecht, Netherlands Kim M. Cohen 1Department of Physical Geography, Faculty of Geosciences, Utrecht University, P.O. Box 80.115, 3508 TC Utrecht, Netherlands2Deltares Subsurface and Groundwater Systems—TNO Geological Survey of the Netherlands, P.O. Box 85.467, 3508 TC Utrecht, Netherlands *Current address: Faculty of Archaeology, Leiden University, Reuvensplaats 3, NL-2311 BE, Leiden, Netherlands; E-mail: m.p.hijma@umail.leidenuniv.nl. Publisher: Geological Society of America Received: 09 Jun 2009 Revision Received: 14 Oct 2009 Accepted: 23 Oct 2009 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2010 Geological Society of America Geology (2010) 38 (3): 275–278. https://doi.org/10.1130/G30439.1 Article history Received: 09 Jun 2009 Revision Received: 14 Oct 2009 Accepted: 23 Oct 2009 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Marc P. Hijma, Kim M. Cohen; Timing and magnitude of the sea-level jump preluding the 8200 yr event. Geology 2010;; 38 (3): 275–278. doi: https://doi.org/10.1130/G30439.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Evidence from terrestrial, glacial, and global climate model reconstructions suggests that a sea-level jump caused by meltwater release was associated with the triggering of the 8.2 ka cooling event. However, there has been no direct measurement of this jump using precise sea-level data. In addition, the chronology of the meltwater pulse is based on marine data with limited dating accuracy. The most plausible mechanism for triggering the cooling event is the sudden, possibly multistaged drainage of the Laurentide proglacial Lakes Agassiz and Ojibway through the Hudson Strait into the North Atlantic ca. 8470 ± 300 yr ago. Here we show with detailed sea-level data from Rotterdam, Netherlands, that the sea-level rise commenced 8450 ± 44 yr ago. Our timing considerably narrows the existing age of this drainage event and provides support for the hypothesis of a double-staged lake drainage. The jump in sea level reached a local magnitude of 2.11 ± 0.89 m within 200 yr, in addition to the ongoing background relative sea-level rise (1.95 ± 0.74 m). This magnitude, observed at considerable distance from the release site, points to a global-averaged eustatic sea-level jump that is double the size of previous estimates (3.0 ± 1.2 m versus 0.4–1.4 m). The discrepancy suggests either a coeval Antarctic contribution or, more likely, a previous underestimate of the total American lake drainage. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.