Auxiliary Material for Paper 2012GL053047

Jeremy S. Hoffman
Geology Department, Augustana College, Rock Island, Illinois, USA

Now at College of Earth, Ocean and Atmospheric Sciences, Oregon State University, Corvallis, Oregon, USA

Anders E. Carlson
Department of Geoscience, University of Wisconsin-Madison, Madison, Wisconsin, USA

Center for Climatic Research, University of Wisconsin-Madison, Madison, Wisconsin, USA

Kelsey Winsor
Department of Geoscience, University of Wisconsin-Madison, Madison, Wisconsin, USA

Gary P. Klinkhammer
College of Earth, Ocean and Atmospheric Sciences, Oregon State University, Corvallis, Oregon, USA

Allegra N. LeGrande
NASA Goddard Institute for Space Studies and Center for Climate System Research, Columbia University, New York, New York, USA

John T. Andrews
Institute for Alpine and Arctic Research and Department of Geological Sciences, University of Colorado Boulder, Boulder, Colorado, USA

Jeffrey C. Strasser
Geology Department, Augustana College, Rock Island, Illinois, USA


Hoffman, J. S., A. E. Carlson, K. Winsor, G. P. Klinkhammer, A. N. LeGrande, J. T. Andrews, and J. C. Strasser (2012), Linking the 8.2 ka event and its freshwater forcing in the Labrador Sea, Geophys. Res. Lett., 39, L18703, doi:10.1029/2012GL053047.

Introduction

The auxiliary material contains a text file, one figure, and three tables.

1. 2012gl053047-txts01.txt
Text S1. Contains detailed description of the core site and methodology along with additional auxiliary references. 

2. 2012gl053047-fs01.pdf
Figure S1. Hydrography of core site HU87033-017; (a) temperature [Locarnini et al., 2010], (b) salinity [Antonov et al., 2010], (c) density and (d) delta 18O of calcite precipitated in isotopic equilibrium with the water [Hillaire-Marcel et al., 2001]. Line colors represent different month averages. Also plotted on (a) is the N. pachyderma (s) CT and on (d) is the N. pachyderma (s) delta 18O of calcite for ~0.9 ka (vertical bars reflect uncertainty of +/-1.3 degree C and +/-0.05 per mil, respectively).

3. 2012gl053047-ts01.txt
Table S1. 14C dates used for HU87033-017 [Andrews et al., 1999]. Additional delta R from Barber et al. [1999].3.1. Column Depth (cm), depth in core HU87033-0173.2. Column 14C age, 14C age of the dated material3.3. Column 1 sigma, analytical uncertainty of the dated material3.4. Column Calibrated*, calibrated age of the sample with a 450 yr reservoir age3.5. Column 1 sigma, calibrated uncertainty3.6. Column delta R 310, calibrated age of the to dates with an additional reservoir age of 310 years3.7. Column 1 sigma, calibrated uncertainty

4. 2012gl053047-ts02.txt
Table S2. HU87033-017 percent sand (>63 microns), Mg/Ca, and calcification temperature (CT) calculated following Kozdon et al. [2009]. CT uncertainty is +/-1.3 degree C.4.1. Column Depth (cm), depth in core HU87033-0174.2. Column Age (yrs), age of the sampled material in calibrated years4.3. Column percent sand, weight percent sand4.4. Column Mg/Ca (mmol/mol), Mg/Ca record4.5. Column CT (degree C), Mg/Ca calibrated temperatures

5. 2012gl053047-ts03.txt
Table S3. HU87033-017 average delta 18Osw at 100-year resolution, propagated uncertainty of +/-0.3 per mil.5.1. Column Age (yrs), interpolated age of the detla 18Osw record5.2. Column delta 18Osw, the delta 18Osw record