Index Catalog // ScholarsArchive@OSU

Creator:: Cuzzone, Joshua K., Clark, Peter U., Carlson, Anders E., Ullman, David J., Rinterknecht, Vincent R., Milne, Glenn A., Lunkka, Juha-Pekka, Wohlfarth, Barbara, Marcott, Shaun A., and Caffee, Marc
Abstract:: The last deglaciation of the Scandinavian Ice Sheet (SIS) from ∼21,000 to 13,000 yr ago is well-constrained by several hundred ¹⁰Be and ¹⁴C ages. The subsequent retreat history, however, is established primarily from minimum-limiting ¹⁴C ages and incomplete Baltic-Sea varve records, leaving a substantial fraction of final SIS retreat history...
Resource Type:: Article

Creator:: Clark, Jorie, McCabe, A. Marshall, Bowen, David Q., and Clark, Peter U.
Abstract:: We summarize 121 ¹⁴C and in-situ cosmogenic (¹⁰Be and ³⁶Cl) ages that constrain fluctuations of the Irish Ice Sheet (IIS) since the Last Glacial Maximum (LGM) that can be linked to abrupt climate changes in the North Atlantic region. These data provide a robust means to date ice-sheet fluctuations because...
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Full Text:: deglaciation Jorie Clark a,*, A. Marshall McCabe b, David Q. Bowen c, Peter U. Clark a aCollege of Earth

Creator:: Meissner, Katrin J. and Clark, Peter U.
Abstract:: The last deglaciation was interrupted by three major cooling events, the Younger Dryas, the Preboreal Oscillation and the 8.2-ka cold event. As the Laurentide Ice Sheet retreated, different outlets from Lake Agassiz became available causing the proglacial lake to drain to a new level in a rather short timescale (flood)...
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Full Text:: therefore causing a cool event in the Northern Hemisphere. Citation: Meissner, K. J., and P. U. Clark (2006

Creator:: Marshall, Shawn J. and Clark, Peter U.
Abstract:: We simulate three-dimensional ice temperature fields to examine spatial-temporal history of the subglacial thermal environment during the last glacial cycle. Model results suggest that 60–80% of the Laurentide Ice Sheet was cold-based (frozen to the bed) at the LGM, and therefore unable to undergo large-scale basal flow. The fraction of...
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Full Text:: of Geomatics Engineering, University of Calgary, Calgary, Alberta, Canada Peter U. Clark Department

Creator:: Carlson, Anders E. and Clark, Peter U.
Abstract:: We review and synthesize the geologic record that constrains the sources of sea level rise and freshwater discharge to the global oceans associated with retreat of ice sheets during the last deglaciation. The Last Glacial Maximum (~26–19 ka) was terminated by a rapid 5–10 m sea level rise at 19.0–19.5...
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Full Text:: the Labrador Sea causing the 8.2 ka event. Citation: Carlson, A. E., and P. U. Clark (2012), Ice

Creator:: Roy, Martin, Clark, Peter U., Duncan, Robert A., and Hemming, Sidney R.
Abstract:: Glacial sedimentary sequences in the north central United States record multiple advances of the Laurentide Ice Sheet (LIS) since ~2 Ma. Although the tills found in these sequences were deposited by southward flowing glacial lobes, little information is available on the geometry of flow lines in the interior of the...
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Full Text:: 2007; Published 18 September 2007. Roy, M., P. U. Clark, R. A. Duncan, and S. R. Hemming (2007

Creator:: Gomez, Natalya, Pollard, David, Mitrovica, Jerry X., Huybers, Peter, and Clark, Peter U.
Abstract:: We investigate the stability of marine ice sheets by coupling a gravitationally self-consistent sea level model valid for a self-gravitating, viscoelastically deforming Earth to a 1-D marine ice sheet-shelf model. The evolution of the coupled model is explored for a suite of simulations in which we vary the bed slope...
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Full Text:: , and P. U. Clark (2012), Evolution of a coupled marine ice sheet–sea level model, J. Geophys. Res., 117

Creator:: Ersek, Vasile, Mix, Alan C., and Clark, Peter U.
Abstract:: We examine the relation between δ¹⁸O in rainwater collected in southwestern Oregon and climate variables including temperature, parcel trajectory, precipitation amount, and specific humidity. Local surface air temperature at the time of sample collection explains a large proportion of δ¹⁸O variability, suggesting that paleoclimatic archives that are related to rainfall...
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Full Text:: composition of the most enriched samples. Citation: Ersek, V., A. C. Mix, and P. U. Clark (2010), Variations

Creator:: Carlson, Anders E., Clark, Peter U., Raisbeck, Grant M., and Brook, Edward J.
Abstract:: Retreat of the Laurentide Ice Sheet (LIS) following the Last Glacial Maximum 21 000 yr BP affected regional to global climate and accounted for the largest proportion of sea level rise. Although the late Pleistocene LIS retreat chronology is relatively well constrained, its Holocene chronology remains poorly dated, limiting our...
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Full Text:: Laurentide Ice Sheet ANDERS E. CARLSON* AND PETER U. CLARK Department of Geosciences, Oregon State

Creator:: Pisias, Nicklas G., Clark, Peter U., and Brook, Edward J.
Abstract:: Recent analysis of 38 globally distributed paleoclimatic records covering Marine Isotope Stage 3 (MIS 3) 60–26 ka demonstrated that the two leading empirical orthogonal functions (EOFs) explaining the data are the Greenland ice-core signal (“northern” signal) and the Antarctic ice-core signal (“southern” signal). Here singular spectral analysis (SSA) is used...
Resource Type:: Article
Full Text:: analysis of a set of 38 published proxy records that significantly expand the global coverage (Clark et

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