Auxiliary material for Paper 2007GL031318 Rapid sea level rise and ice sheet response to 8,200-year climate event T. M. Cronin U.S. Geological Survey, Reston, Virginia, USA P. R. Vogt Naval Research Laboratory, Washington, D. C., USA D. A. Willard U.S. Geological Survey, Reston, Virginia, USA R. Thunell Department of Geological Sciences, University of South Carolina, Columbia, South Carolina, USA J. Halka Maryland Geological Survey, Baltimore, Maryland, USA M. Berke U.S. Geological Survey, Reston, Virginia, USA J. Pohlman U.S. Geological Survey, Woods Hole, Massachusetts, USA Cronin, T. M., P. R. Vogt, D. A. Willard, R. Thunell, J. Halka, M. Berke, and J. Pohlman (2007), Rapid sea level rise and ice sheet response to 8,200-year climate event, Geophys. Res. Lett., 34, L20603, doi:10.1029/2007GL031318. Introduction New radiocarbon dates from Marion-Dufresne 2003 cruise are given in table "2007GL031318-ts01.txt" corrected with atmospheric (plant material) and marine (shells) calibration models (Stuiver et al. 1998). There is no significant local reservoir effect (ÆR) on Chesapeake shell dates (Cronin et al. 2000, Colman et al., 2002). Old carbon led to anomalously old ages in some brackish water mollusks ((13C = -6 to -10ä) in coastal facies (e.g. MD99-2207, 1300 - 1000 cm; MD99-2204, 550-300 cm; MD03-2661, 2115-1850 cm). Comparison of paired Mulinia and plant dates from the marsh facies in MD03-2656 (528 - 851 cm) showed four plant samples older (mean = +275 years), and four younger (mean =-178 years) than shell dates. The age differences for two shell-seed pairs were +230 (580 cm) and - 260 years (644 cm). Table 2 lists age and elevation data for sea-level datums used in Fig. 3 in comparison between Chesapeake Bay and other sea-level curves. 1. 2007gl031318-ts01.txt New radiocarbon dates for Chesapeake Bay sediment cores used in Figures 1 and 2 in this study. 1.1 Column "lab #", Radiocarbon lab numbers, 6-digit #s are Beta Analytic; - OS #s are National Ocean Sciences Accelerator Mass Spectrometer, Woods Hole Oceanographic Institution 1.2 Column "core", Marion-Dufresne core number 1.3 Column "wdepth", m, water depth at core site 1.4 Column "depth", cm, core depth for radiocarbon sample 1.5 Column "lat", degrees, minutes, latitude north 1.6 Column "long", degrees, minutes, longitude west 1.7 Column "sample", material dated 1.8 Column "_13C", ä, carbon isotope value for dated sample, old carbon suspected when _13C is less than about 6 ä 1.9 Column "14Cage", yrs, uncorrected conventional radiocarbon age (mod=post- 1950) 1.10 Column "error", yrs, lab counting error 1.11 Column "calageyrBP", yrs, calibrated age, using Calib5.02 Program to convert radiocarbon to calibrated age (http://calib.qub.ac.uk/calib/) 1.12 Column "error_+", yrs, maximum calibrated age using 2_ uncertainty 1.13 Column "error_-", yrs, minimum calibrated age using 2_ uncertainty 1.14 Column "comment", remarks about sample age 2. 2007gl031318-ts02.txt Sea level datums for Chesapeake Bay sea-level curve in Figure 3 of this study. 1.1 Column "lab#", Radiocarbon lab numbers, WW=USGS Reston lab, 6-digit #s are Beta Analytic; - OS #s are National Ocean Sciences Accelerator Mass Spectrometer, Woods Hole Oceanographic Institution 1.2 Column "core", core name, number 1.3 Column "wdepth", m, water depth at core site 1.4 Column "depth", cm, core depth for radiocarbon sample 1.5 Column "lat", degrees, minutes, latitude north 1.6 Column "long", degrees, minutes, longitude west 1.7 Column "sample", material dated 1.8 Column "_13C", ä, carbon isotope value for dated sample, old carbon suspected when _13C is less than about 6 ä, 1.9 Column "depth_s", m, sample depth below sea level 1.10 Column "depth_sub", m, sample depth below sea level corrected for 1. mm/yr mean Holocene glacio-isostatic subsidence 1.11 Column "calageyrBP", yrs, calibrated age, using Calib5.02 Program to convert radiocarbon to calibrated age (http://calib.qub.ac.uk/calib/) 1.12 Column "error_+", yrs, maximum calibrated age using 2_ uncertainty 1.13 Column "error_-", yrs, minimum calibrated age using 2_ uncertainty 1.14 Column "ref", reference for seae-level datum (see below) Acknowledgments. C. Hillaire-Marcel and B. Ghaleb kindly provided U-series analyses. We thank S. Verardo and A. Lavenberg for help with micropaleontology.