# Eirik Drift MIS 11 Marine Sediment Sr-Nd-Pb Isotope Geochemistry #----------------------------------------------------------------------- # World Data Center for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # NOTE: Please cite Publication, and Online_Resource and date accessed when using these data. # If there is no publication information, please cite Investigators, Title, and Online_Resource and date accessed. # # # Online_Resource: http://www.hurricane.ncdc.noaa.gov/pls/paleox/f?p=519:1:::::P1_STUDY_ID:16436 # # Online_Resource: http://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/reyes2014/reyes2014md99-2227.txt # # Description/Documentation lines begin with # # Data lines have no # # # Archive: Paleoceanography #-------------------- # Contribution_Date # Date: 2014-06-26 #-------------------- # Title # Study_Name: Eirik Drift MIS 11 Marine Sediment Sr-Nd-Pb Isotope Geochemistry #-------------------- # Investigators # Investigators: Reyes, A.V.; Carlson, A.E.; Beard, B.L.; Hatfield, R.G.; Stoner, J.S.; Winsor, K.; Welke, B.; Ullman, D.J. #-------------------- # Description_and_Notes # Description: Sr-Nd-Pb isotope geochemistry on the 0.1M HCl-leached silt fraction of marine sediment core MD99-2227. # #Sediment-type abbreviations (refer to supporting information ): # LDC low-detrital carbonate # DC detrital carbonate #-------------------- # Publication # Authors: Alberto V. Reyes, Anders E. Carlson, Brian L. Beard, Robert G. Hatfield, Joseph S. Stoner, Kelsey Winsor, Bethany Welke, and David J. Ullman # Published_Date_or_Year: 2014-06-26 # Published_Title: South Greenland ice-sheet collapse during Marine Isotope Stage 11 # Journal_Name: Nature # Volume: 510 # Edition: # Issue: 7506 # Pages: 525-528 # DOI: 10.1038/nature13456 # Online_Resource: http://www.nature.com/nature/journal/v510/n7506/full/nature13456.html # Full_Citation: # Abstract: Varying levels of boreal summer insolation and associated Earth system feedbacks led to differing climate and ice-sheet states during late-Quaternary interglaciations. In particular, Marine Isotope Stage (MIS) 11 was an exceptionally long interglaciation and potentially had a global mean sea level 6 to 13 metres above the present level around 410,000 to 400,000 years ago, implying substantial mass loss from the Greenland ice sheet (GIS). There are, however, no model simulations and only limited proxy data to constrain the magnitude of the GIS response to climate change during this 'super interglacial', thus confounding efforts to assess climate/ice--sheet threshold behaviour and associated sea-level rise. Here we show that the south GIS was drastically smaller during MIS11 than it is now, with only a small residual ice dome over southernmost Greenland. We use the strontium-neodymium-lead isotopic composition of proglacial sediment discharged from south Greenland to constrain the provenance of terrigenous silt deposited on the Eirik Drift, a sedimentary deposit off the south Greenland margin. We identify a major reduction in sediment input derived from south Greenland's Precambrian bedrock terranes, probably reflecting the cessation of subglacial erosion and sediment transport as a result of near-complete deglaciation of south Greenland. Comparison with ice-sheet configurations from numerical models suggests that the GIS lost about 4.5 to 6 metres of sea-level-equivalent volume during MIS11. This is evidence for late-Quaternary GIS collapse after it crossed a climate/ice-sheet stability threshold that may have been no more than several degrees above pre-industrial temperatures. #------------------ # Funding_Agency # Funding_Agency_Name: US National Science Foundation # Grant: ARC-0902571, ARC-0902751 #------------------ # Site_Information # Site_Name: MD99-2227 # Location: Ocean>Atlantic Ocean>North Atlantic Ocean # Country: # Northernmost_Latitude: 58.21 # Southernmost_Latitude: 58.21 # Easternmost_Longitude: -48.37 # Westernmost_Longitude: -48.37 # Elevation: -3460 m #------------------ # Data_Collection # Collection_Name: Reyes2014MD99-2227 # Earliest_Year: 426800 # Most_Recent_Year: 391300 # Time_Unit: Cal. Year BP # Core_Length: # Notes: #------------------ # Chronology: # # # # #---------------- # Variables # # Data variables follow (have no #) # Data line variables format: Variables list, one per line, shortname-tab-longname-tab-longname components (9 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data) ## depth_cm depth, , , cm, , , , , N ## age_ka age, , , 10^3 years before present, , , , , N ## sand% sand content, , , dry weight%, , , , , N ## silt% silt content, , , dry weight%, , , , , N ## sed_type sediment description, , , , , , , , C ## Sr_ppm Sr concentration, CaCO3-free silt, , ppm, , , , isotope dilution, N ## Rb_ppm Rb concentration, CaCO3-free silt, , ppm, , , , isotope dilution, N ## 87Rb/86Sr 87Rb/86Sr, CaCO3-free silt, , , , , , , N ## 87Sr/86Sr 87Sr/86Sr, CaCO3-free silt, , , , , , TIMS, N ## 87Sr/86S_2SE 2x std-error on 87Sr/86Sr, CaCO3-free silt, , , , , , TIMS, N ## Nd_ppm Nd concentration, CaCO3-free silt, , ppm, , , , isotope dilution, N ## Sm_ppm Sm concentration, CaCO3-free silt, , ppm, , , , isotope dilution, N ## 147Sm/144Nd 147Sm/144Nd, CaCO3-free silt, , , , , , , N ## 143Nd/144Nd 143Nd/144Nd, CaCO3-free silt, , , , , , TIMS, N ## 143Nd/144Nd 2x std-error on 143Nd/144Nd, CaCO3-free silt, , , , , , TIMS, N ## eNd epsilon Nd, CaCO3-free silt, , epsilon units relative to CHUR 143/144 Nd, , , , , N ## 206Pb/204Pb 206Pb/204Pb, CaCO3-free silt, , , , , , TIMS, N ## 207Pb/204Pb 207Pb/204Pb, CaCO3-free silt, , , , , , TIMS, N ## 208Pb/204Pb 208Pb/204Pb, CaCO3-free silt, , , , , , TIMS, N #---------------- # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Values: -999 depth_cm age_ka sand% silt% sed_type Sr_ppm Rb_ppm 87Rb/86Sr 87Sr/86Sr 87Sr/86Sr_2SE Nd_ppm Sm_ppm 147Sm/144Nd 143Nd/144Nd 143Nd/144Nd_2SE eNd 206Pb/204Pb 207Pb/204Pb 208Pb/204Pb 3870 391.3 0.6 32.4 -999 414 56.1 0.3917 0.710892 0.000008 23.7 4.9 0.1247 0.512118 0.000008 -10.1 18.348 15.507 38.661 3890 393.9 0.5 32.8 -999 378 40.9 0.3130 0.710015 0.000011 24.1 5.1 0.1285 0.512138 0.000009 -9.7 18.060 15.458 38.364 3910 396.5 0.5 35.0 -999 447 34.4 0.2222 0.709551 0.000019 23.5 5.0 0.1284 0.512116 0.000008 -10.2 17.899 15.422 38.192 3925 398.4 0.4 37.3 -999 642 37.9 0.1709 0.709705 0.000010 21.4 4.5 0.1275 0.512171 0.000007 -9.1 18.083 15.459 38.401 3945 401.0 0.5 44.7 -999 492 36.9 0.2170 0.709359 0.000012 23.7 5.1 0.1294 0.512210 0.000007 -8.4 18.149 15.499 38.449 3965 402.5 0.3 46.1 -999 322 39.8 0.3574 0.709877 0.000012 25.2 5.2 0.1254 0.512032 0.000007 -11.8 17.637 15.417 38.297 3970 402.8 0.1 35.6 -999 323 37.4 0.3356 0.710060 0.000009 20.0 3.8 0.1165 0.511666 0.000008 -19.0 17.048 15.298 37.848 3980 403.6 0.1 45.4 -999 312 33.3 0.3085 0.709949 0.000010 18.8 3.7 0.1193 0.511697 0.000007 -18.4 16.947 15.272 37.547 3990 404.3 0.2 34.4 -999 296 42.6 0.4165 0.709829 0.000009 19.4 3.9 0.1227 0.511949 0.000008 -13.4 17.570 15.385 38.069 4000 405.0 0.1 59.3 LDC 294 32.3 0.3174 0.709130 0.000009 19.8 4.1 0.1245 0.511955 0.000007 -13.3 17.365 15.334 37.852 4005 405.4 0.0 87.1 LDC 300 30.0 0.2898 0.708952 0.000010 16.1 3.3 0.1260 0.511968 0.000010 -13.1 17.030 15.319 37.418 4010 405.8 0.1 73.8 LDC 301 24.0 0.2305 0.708856 0.000037 21.5 4.8 0.1350 0.511820 0.000008 -16.0 17.200 15.335 37.727 4020 406.5 0.3 37.0 -999 300 36.1 0.3483 0.709377 0.000010 24.9 5.3 0.1287 0.512153 0.000007 -9.5 17.857 15.424 38.195 4025 406.9 0.6 38.5 -999 593 35.3 0.1722 0.709270 0.000010 21.2 4.6 0.1320 0.512351 0.000006 -5.6 18.397 15.530 38.565 4035 407.6 0.3 37.6 -999 408 34.7 0.2461 0.709291 0.000009 23.3 5.0 0.1302 0.512197 0.000008 -8.6 17.952 15.481 38.339 4045 408.3 0.5 38.9 -999 450 31.7 0.2039 0.709251 0.000011 23.7 5.1 0.1301 0.512206 0.000007 -8.4 18.000 15.456 38.266 4055 409.1 0.3 34.2 -999 454 30.7 0.1953 0.709199 0.000010 24.7 5.3 0.1306 0.512186 0.000007 -8.8 18.035 15.459 38.394 4060 410.0 0.6 34.5 -999 277 34.4 0.3597 0.709334 0.000009 20.1 4.2 0.1251 0.512029 0.000008 -11.9 17.840 15.415 38.149 4070 412.0 0.3 36.6 -999 384 35.9 0.2704 0.709735 0.000011 26.0 5.4 0.1262 0.512008 0.000008 -12.3 17.645 15.377 38.019 4080 414.0 0.1 32.1 LDC 327 40.7 0.3598 0.710664 0.000010 23.2 4.5 0.1173 0.511688 0.000009 -18.5 16.920 15.242 37.646 4090 415.5 1.2 27.4 -999 449 32.3 0.2081 0.709365 0.000009 22.6 5.0 0.1337 0.512365 0.000006 -5.3 18.134 15.463 38.257 4100 416.4 32.0 67.3 -999 256 37.4 0.4224 0.709726 0.000008 20.7 4.4 0.1287 0.512175 0.000009 -9.0 -999.000 -999.000 -999.000 4110 417.4 0.7 51.7 -999 431 34.8 0.2338 0.709864 0.000010 21.5 4.6 0.1296 0.512157 0.000007 -9.4 17.827 15.413 38.101 4135 419.7 0.2 80.7 -999 353 34.6 0.2835 0.710396 0.000013 24.0 4.5 0.1147 0.511585 0.000007 -20.5 16.678 15.182 37.082 4140 420.1 0.4 62.4 -999 334 37.2 0.3227 0.710955 0.000009 22.1 4.4 0.1218 0.511934 0.000007 -13.7 17.142 15.279 37.310 4155 421.3 1.5 41.1 -999 302 49.8 0.4782 0.712932 0.000009 23.2 4.8 0.1242 0.512005 0.000007 -12.3 17.520 15.321 37.653 4165 422.0 1.0 41.6 -999 301 47.0 0.4511 0.712343 0.000010 27.9 5.6 0.1208 0.511808 0.000007 -16.2 17.785 15.404 37.973 4170 422.4 1.0 38.5 -999 294 57.8 0.5694 0.713919 0.000009 25.9 5.2 0.1220 0.511953 0.000007 -13.4 17.804 15.377 38.016 4185 423.5 0.6 34.7 -999 286 58.3 0.5888 0.714933 0.000011 22.7 4.5 0.1200 0.511887 0.000008 -14.7 17.794 15.408 38.096 4190 423.9 0.5 29.9 -999 294 53.8 0.5301 0.714282 0.000009 21.0 3.9 0.1127 0.511690 0.000008 -18.5 -999.000 -999.000 -999.000 4200 424.6 1.1 33.1 -999 274 58.2 0.6158 0.714881 0.000015 24.7 4.8 0.1182 0.511873 0.000008 -14.9 17.948 15.400 38.184 4220 426.0 0.4 24.9 -999 281 59.4 0.6123 0.716013 0.000009 25.7 4.8 0.1133 0.511684 0.000007 -18.6 17.733 15.390 38.236 4240 426.8 25.4 34.5 DC 255 47.9 0.5439 0.717280 0.000009 17.1 3.2 0.1122 0.511569 0.000009 -20.9 17.794 15.465 38.739