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Terrestrial climate signal of the "8200 yr B.P. cold event" in the Labrador Sea region

2009; Geological Society of America; Volume: 37; Issue: 9 Linguagem: Inglês

10.1130/g30043a.1

1943-2682

Tim Daley, F. Alayne Street‐Perrott, Neil J. Loader, Keith Barber, Paul Hughes, E. H. Fisher, J. D. Marshall,

Climate change and permafrost

Research Article| September 01, 2009 Terrestrial climate signal of the "8200 yr B.P. cold event" in the Labrador Sea region Timothy J. Daley; Timothy J. Daley * 1School of the Environment and Society, Swansea University, Swansea SA2 8PP, UK2Palaeoecology Laboratory (PLUS), School of Geography, University of Southampton, Southampton SO17 1BJ, UK *E-mail: t.j.daley@swansea.ac.uk. Search for other works by this author on: GSW Google Scholar F. Alayne Street-Perrott; F. Alayne Street-Perrott 1School of the Environment and Society, Swansea University, Swansea SA2 8PP, UK Search for other works by this author on: GSW Google Scholar Neil J. Loader; Neil J. Loader 1School of the Environment and Society, Swansea University, Swansea SA2 8PP, UK Search for other works by this author on: GSW Google Scholar Keith E. Barber; Keith E. Barber 2Palaeoecology Laboratory (PLUS), School of Geography, University of Southampton, Southampton SO17 1BJ, UK Search for other works by this author on: GSW Google Scholar Paul D.M. Hughes; Paul D.M. Hughes 2Palaeoecology Laboratory (PLUS), School of Geography, University of Southampton, Southampton SO17 1BJ, UK Search for other works by this author on: GSW Google Scholar Elizabeth H. Fisher; Elizabeth H. Fisher 3Department of Earth and Ocean Sciences, University of Liverpool, Liverpool L69 3GP, UK Search for other works by this author on: GSW Google Scholar James D. Marshall James D. Marshall 3Department of Earth and Ocean Sciences, University of Liverpool, Liverpool L69 3GP, UK Search for other works by this author on: GSW Google Scholar Author and Article Information Timothy J. Daley * 1School of the Environment and Society, Swansea University, Swansea SA2 8PP, UK2Palaeoecology Laboratory (PLUS), School of Geography, University of Southampton, Southampton SO17 1BJ, UK F. Alayne Street-Perrott 1School of the Environment and Society, Swansea University, Swansea SA2 8PP, UK Neil J. Loader 1School of the Environment and Society, Swansea University, Swansea SA2 8PP, UK Keith E. Barber 2Palaeoecology Laboratory (PLUS), School of Geography, University of Southampton, Southampton SO17 1BJ, UK Paul D.M. Hughes 2Palaeoecology Laboratory (PLUS), School of Geography, University of Southampton, Southampton SO17 1BJ, UK Elizabeth H. Fisher 3Department of Earth and Ocean Sciences, University of Liverpool, Liverpool L69 3GP, UK James D. Marshall 3Department of Earth and Ocean Sciences, University of Liverpool, Liverpool L69 3GP, UK *E-mail: t.j.daley@swansea.ac.uk. Publisher: Geological Society of America Received: 20 Jan 2009 Revision Received: 15 Apr 2009 Accepted: 28 Apr 2009 First Online: 02 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2009 Geological Society of America Geology (2009) 37 (9): 831–834. https://doi.org/10.1130/G30043A.1 Article history Received: 20 Jan 2009 Revision Received: 15 Apr 2009 Accepted: 28 Apr 2009 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Timothy J. Daley, F. Alayne Street-Perrott, Neil J. Loader, Keith E. Barber, Paul D.M. Hughes, Elizabeth H. Fisher, James D. Marshall; Terrestrial climate signal of the "8200 yr B.P. cold event" in the Labrador Sea region. Geology 2009;; 37 (9): 831–834. doi: https://doi.org/10.1130/G30043A.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 Accelerated melting of Greenland ice has raised concern about the future impact of enhanced freshwater discharge on regional climate through its effect on ocean circulation. An abrupt cooling event ca. 8200 cal. yr B.P. has been linked to meltwater from the decaying North American ice sheet. Oxygen isotopic analyses of cellulose from subfossil Sphagnum mosses, isolated from a Newfoundland peat core, reveal a pronounced anomaly ca. 8350 yr B.P. with a duration of ~150 years. The maximum estimated δ18Oprecipitation change, 4.53‰ ± 1.05‰ (Vienna Standard Mean Ocean Water), is the largest observed in the circum-North Atlantic region. The magnitude of change exceeds that predicted by recent paleoclimate simulations. Comparisons with recent records of surface and deep ocean proxies in the Labrador Sea and the wider North Atlantic region suggest synchroneity. However, an ~200 year delay between the responses of the Labrador Sea region and the Greenland Ice Sheet to the effects of meltwater release remains to be explained. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.