# Antarctic Ice Cores Revised 800KYr CO2 Data #----------------------------------------------------------------------- # 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://ncdc.noaa.gov/paleo/study/17975 # # Original_Source_URL: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2015co2siple.txt # # Description/Documentation lines begin with # # Data lines have no # # # Archive: Ice Cores #-------------------- # Contribution_Date # Date: 2015-02-04 #-------------------- # Title # Study_Name: Antarctic Ice Cores Revised 800KYr CO2 Data #-------------------- # Investigators # Investigators: Bereiter, B.; Eggleston, S.; Schmitt, J.; Nehrbass-Ahles, C.; Stocker, T.F.; Fischer, H.; Kipfstuhl, S.; Chappellaz, J. #-------------------- # Description_and_Notes # Description: Revised EPICA Dome C and Antarctic composite ice core atmospheric CO2 data. This new version of CO2 composite # replaces the old version of Luthi et al. (2008), which contains the analytical bias described in Bereiter et al. 2015 # and lower quality data in other sections. For details about the improvements relative to the previous version see supplementary # information of Bereiter et al. 2015. For detailed references of all records refer to the supplemetary information of # Bereiter et al. 2015. For latest anthropogenic data refer to NOAA/Mauna Loa record. Age unit is in years before present (yr BP) # where present refers to 1950 AD. Note, not all records shown in Excel worksheet "all records" are part of the composite. # # Composite built from the following: # -51-1800 yr BP: Law Dome (Rubino et al., 2013) # 1.8-2 kyr BP: Law Dome (MacFarling Meure et al., 2006) # 2-11 kyr BP: Dome C (Monnin et al., 2001 + 2004) # 11-22 kyr BP: WAIS (Marcott et al., 2014) minus 4 ppmv (see text) # 22-40 kyr BP: Siple Dome (Ahn et al., 2014) # 40-60 kyr BP: TALDICE (Bereiter et al., 2012) # 60-115 kyr BP: EDML (Bereiter et al., 2012) # 105-155 kyr BP: Dome C Sublimation (Schneider et al., 2013) # 155-393 kyr BP: Vostok (Petit et al., 1999) # 393-611 kyr BP: Dome C (Siegenthaler et al., 2005) # 612-800 kyr BP: Dome C (Bereiter et al., 2014) # # If millennial scale or smaller details of the composite are studied, we recommend to look into all records available # for that period and not only in the composite. # #-------------------- # Publication # Authors: Bernhard Bereiter, Sarah Eggleston, Jochen Schmitt, Christoph Nehrbass-Ahles, Thomas F. Stocker, Hubertus Fischer, Sepp Kipfstuhl and Jerome Chappellaz # Published_Date_or_Year: 2015-01-23 # Published_Title: Revision of the EPICA Dome C CO2 record from 800 to 600 kyr before present # Journal_Name: Geophysical Research Letters # Volume: # Edition: # Issue: # Pages: # DOI: 10.1002/2014GL061957 # Online_Resource: http://onlinelibrary.wiley.com/doi/10.1002/2014GL061957/abstract # Full_Citation: # Abstract: The European Project for Ice Coring in Antarctica Dome ice core from Dome C (EDC) has allowed for the reconstruction of atmospheric CO2 concentrations for the last 800,000 years. Here we revisit the oldest part of the EDC CO2 record using different air extraction methods and sections of the core. For our established cracker system, we found an analytical artifact, which increases over the deepest 200 m and reaches 10.1 +/- 2.4 ppm in the oldest/deepest part. The governing mechanism is not yet fully understood, but it is related to insufficient gas extraction in combination with ice relaxation during storage and ice structure. The corrected record presented here resolves partly - but not completely - the issue with a different correlation between CO2 and Antarctic temperatures found in this oldest part of the records. In addition, we provide here an update of 800,000 years atmospheric CO2 history including recent studies covering the last glacial cycle. #------------------ # Publication # Authors: Dieter Luthi, Martine Le Floch, Bernhard Bereiter, Thomas Blunier, Jean-Marc Barnola, Urs Siegenthaler, Dominique Raynaud, Jean Jouzel, Hubertus Fischer, Kenji Kawamura, and Thomas F. Stocker # Published_Date_or_Year: 2008-05-15 # Published_Title: High-resolution carbon dioxide concentration record 650,000-800,000 years before present # Journal_Name: Nature # Volume: 453 # Edition: # Issue: # Pages: 379-382 # DOI: 10.1038/nature06949 # Online_Resource: http://www.nature.com/nature/journal/v453/n7193/full/nature06949.html # Full_Citation: # Abstract: Changes in past atmospheric carbon dioxide concentrations can be determined by measuring the composition of air trapped in ice cores from Antarctica. So far, the Antarctic Vostok and EPICA Dome C ice cores have provided a composite record of atmospheric carbon dioxide levels over the past 650,000 years. Here we present results of the lowest 200 m of the Dome C ice core, extending the record of atmospheric carbon dioxide concentration by two complete glacial cycles to 800,000 yr before present. From previously published data and the present work, we find that atmospheric carbon dioxide is strongly correlated with Antarctic temperature throughout eight glacial cycles but with significantly lower concentrations between 650,000 and 750,000 yr before present. Carbon dioxide levels are below 180 parts per million by volume (p.p.m.v.) for a period of 3,000 yr during Marine Isotope Stage 16, possibly reflecting more pronounced oceanic carbon storage. We report the lowest carbon dioxide concentration measured in an ice core, which extends the pre-industrial range of carbon dioxide concentrations during the late Quaternary by about 10 p.p.m.v. to 172–300 p.p.m.v. #------------------ # Funding_Agency # Funding_Agency_Name: European Union # Grant: #------------------ # Funding_Agency # Funding_Agency_Name: Swiss National Science Foundation # Grant: P2BEP2_152071 #------------------ # Funding_Agency # Funding_Agency_Name: University of Bern # Grant: #------------------ # Funding_Agency # Funding_Agency_Name: French Polar Institute (IPEV) # Grant: 902 #------------------ # Site_Information # Site_Name: Siple Dome # Location: Antarctica # Country: # Northernmost_Latitude: -80.02 # Southernmost_Latitude: -80.02 # Easternmost_Longitude: -119.52 # Westernmost_Longitude: -119.52 # Elevation: 1530 m #------------------ # Data_Collection # Collection_Name: Antarctica2015CO2Siple # Earliest_Year: 48720 # Most_Recent_Year: 7294 # Time_Unit: Cal. Year BP # Core_Length: m # Notes: #------------------ # Chronology: # # Tuned to GICC05/AICC2012 by Ahn et al. (2014) # AICC2012: http://www.ncdc.noaa.gov/paleo/study/15076 # #---------------- # Variables # # Data variables follow that are preceded by "##" in columns one and two. # 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_m depth, , , m, , , , ,N ##age_gas_calBP age, gas, , calendar years before present, , , , tuned to GICC05/AICC2012 by Ahn et al. (2014),N ##age_gas_calBPerr age uncertainty, gas, , years, , , , ,N ##co2_ppm CO2 concentration, , , ppmv, , , corrected, ,N ##co2_1s_ppm CO2 concentration sigma mean, , , ppmv, , , , ,N ##notes notes - publication and laboratory,,,,,,,,C # #---------------- # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Values: # depth_m age_gas_calBP age_gas_calBPerr co2_ppm co2_1s_ppm notes 490.19 7294.00 0.70 264.83 1.04 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 490.92 7319.25 0.45 263.74 0.17 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 491.61 7342.80 0.50 261.90 0.83 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 492.47 7372.20 0.40 263.17 0.32 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 493.00 7390.25 0.85 263.98 0.66 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 493.54 7408.55 0.45 263.37 0.43 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 494.16 7429.70 0.40 261.96 0.22 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 494.72 7448.75 0.35 262.36 0.16 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 495.25 7466.95 0.85 262.47 0.95 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 496.10 7495.40 3.20 265.16 0.14 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 496.57 7511.35 0.85 262.94 0.91 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 497.04 7527.80 0.90 263.68 0.31 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 497.42 7540.75 0.35 262.77 0.77 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 497.95 7559.35 0.95 262.69 0.93 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 498.38 7574.20 0.70 262.52 0.83 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 498.95 7594.20 0.90 262.62 0.19 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 499.41 7610.05 0.35 264.33 0.09 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 499.87 7627.65 0.45 261.96 0.47 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 500.42 7648.45 0.75 263.23 0.10 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 501.12 7674.95 0.65 263.03 0.39 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 501.49 7689.05 0.45 262.97 0.13 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 502.14 7713.50 10.20 261.89 0.05 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 502.68 7733.95 10.25 261.43 0.50 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 502.98 7745.15 0.75 264.15 0.34 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 504.04 7785.50 2.40 263.75 0.03 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 504.75 7812.60 0.50 260.85 0.27 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 505.17 7828.75 2.25 263.06 0.71 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 506.06 7863.10 1.90 262.80 0.31 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 506.14 7866.00 0.80 263.79 0.47 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 506.62 7884.45 0.45 264.12 0.32 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 507.05 7901.15 1.95 263.61 0.36 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 507.30 7911.05 0.45 262.31 0.10 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 507.48 7917.95 1.65 262.62 0.02 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 508.15 7944.05 1.75 263.63 0.75 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 508.81 7969.80 0.50 263.77 0.00 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 508.94 7974.65 0.95 266.74 0.71 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 508.99 7976.90 1.30 266.62 0.18 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 510.06 8017.80 2.00 262.73 0.74 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 510.13 8020.35 0.75 266.33 0.76 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 510.31 8027.15 1.85 262.97 0.20 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 510.85 8047.15 0.65 264.11 1.09 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 510.99 8052.05 1.65 261.92 0.56 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 511.34 8065.35 0.85 263.98 0.70 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 511.46 8070.00 1.90 261.15 0.10 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 511.84 8084.25 1.35 265.00 0.50 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 512.75 8123.25 1.45 262.53 0.24 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 512.98 8134.20 2.50 265.26 0.30 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 513.10 8140.60 1.90 266.48 0.31 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 513.28 8149.35 3.25 265.35 0.20 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 513.45 8158.00 3.80 264.42 0.26 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 513.69 8170.40 0.90 264.35 0.63 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 513.75 8173.60 0.80 262.07 1.02 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 514.17 8194.70 0.50 264.80 0.32 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 514.34 8203.65 2.25 266.10 0.48 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 514.73 8223.15 1.05 263.55 0.12 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 515.09 8241.50 1.00 263.11 0.79 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 515.35 8254.55 3.15 264.10 0.78 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 515.46 8259.90 2.00 264.08 0.64 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 515.82 8274.75 2.45 264.81 0.75 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 516.24 8290.85 0.75 262.27 0.03 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 516.50 8300.50 0.40 263.97 0.17 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 516.59 8303.85 0.35 262.50 0.50 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 516.69 8307.50 1.90 262.38 0.06 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 516.79 8311.15 2.05 263.80 0.80 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 517.25 8327.00 1.50 263.47 0.97 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 517.62 8337.95 0.35 263.31 1.05 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 517.92 8346.90 2.10 261.93 0.41 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 518.65 8369.00 1.20 261.88 0.76 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 518.84 8374.60 2.00 261.78 0.40 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 519.83 8404.55 0.75 264.47 0.23 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 520.38 8421.50 1.50 263.85 0.04 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 520.67 8430.25 0.75 263.25 1.04 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 520.94 8438.70 1.20 264.96 0.77 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 521.33 8450.65 0.75 265.48 0.60 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 521.98 8471.10 2.40 263.15 0.36 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 522.44 8485.35 0.65 262.75 0.03 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 522.94 8500.80 0.20 265.43 0.34 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 523.30 8511.60 0.30 264.93 0.84 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 523.92 8530.90 1.10 267.68 0.64 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 524.42 8546.45 0.35 264.25 0.71 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 525.13 8569.10 1.60 268.09 0.71 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 525.11 8568.30 0.20 265.58 0.03 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 525.61 8584.10 0.40 264.82 1.05 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 526.37 8607.95 0.35 265.83 0.16 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 527.04 8629.45 0.95 266.52 0.42 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 527.68 8649.30 0.60 266.15 0.92 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 528.41 8672.00 0.50 265.37 0.31 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 529.00 8690.00 0.50 268.89 0.55 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 529.51 8705.60 0.30 266.40 0.61 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 530.04 8721.95 0.25 265.33 0.24 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 530.52 8736.40 0.30 265.54 0.03 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 531.02 8751.95 0.45 266.45 1.09 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 531.45 8765.45 0.65 265.49 0.16 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 532.08 8784.65 0.65 266.86 0.11 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 532.57 8799.75 0.85 265.72 0.22 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 533.09 8815.60 1.90 266.28 0.46 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 533.52 8828.70 0.30 265.82 0.02 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 533.95 8842.05 1.55 266.87 0.20 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 534.52 8859.60 0.50 263.94 0.28 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 534.91 8871.60 1.70 266.76 0.90 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 535.43 8887.80 0.40 263.90 0.45 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 536.05 8907.05 1.55 263.63 0.32 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 536.28 8914.00 0.70 264.54 0.48 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 537.11 8939.70 1.00 262.36 1.02 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 537.52 8952.00 0.30 262.50 0.02 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 538.07 8968.85 1.65 264.27 0.45 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 538.52 8982.50 0.30 264.46 0.40 Siple Dome (7.3 - 9 kyr BP) Ahn et al. (2014 b) (Geophysical Research Letters) Oregon State University 726.01 21925.90 184.46 0.50 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 727.78 22292.20 187.22 0.45 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 728.05 22347.60 187.02 1.25 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 729.12 22550.10 184.68 0.20 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 729.49 22604.10 185.21 1.63 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 730.03 22650.80 188.49 0.23 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 731.15 22749.30 190.01 0.25 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 732.14 22833.60 186.13 0.13 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 733.90 22994.00 189.40 1.13 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 734.11 23013.80 190.53 0.64 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 735.19 23107.30 190.08 0.82 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 736.06 23185.00 188.60 0.87 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 737.12 23276.70 197.67 1.29 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 738.05 23358.40 193.53 1.72 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 739.04 23445.20 186.78 0.46 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 740.10 23600.50 187.99 0.41 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 741.37 23873.80 183.13 0.03 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 742.30 24077.70 184.68 0.62 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 743.17 24269.80 186.73 0.92 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 744.86 24643.60 180.57 2.72 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 747.25 25163.60 180.69 0.78 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 748.11 25351.10 182.66 0.08 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 748.95 25543.60 183.38 0.62 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 750.07 25786.00 186.54 0.58 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 751.13 26016.00 184.52 0.41 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 752.18 26254.50 184.57 0.52 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 752.46 26315.00 183.77 0.53 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 753.13 26460.70 186.01 0.81 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 753.48 26537.10 185.51 0.53 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 754.23 26703.70 185.44 0.33 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 754.93 26857.80 186.43 0.22 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 755.37 26954.90 188.08 0.80 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 755.77 27042.00 187.39 0.21 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 755.96 27084.80 186.27 0.06 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 756.35 27170.20 194.93 0.48 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 756.86 27280.10 190.06 0.47 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 757.65 27441.90 191.95 0.84 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 758.01 27502.80 191.23 1.92 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 758.51 27549.70 191.53 1.94 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 758.94 27586.40 191.95 0.38 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 759.82 27661.30 191.46 0.69 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 760.12 27687.00 192.71 0.08 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 760.42 27714.10 190.61 1.64 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 760.48 27718.60 189.30 0.32 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 761.20 27820.70 187.59 0.87 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 761.50 27866.40 190.58 0.49 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 761.62 27885.00 189.28 0.12 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 761.89 27927.10 188.99 0.39 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 762.19 27973.20 189.29 0.31 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 763.02 28097.30 189.96 0.64 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 763.78 28214.10 191.82 0.28 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 764.16 28271.60 191.59 0.32 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 764.77 28369.70 192.63 1.67 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 765.05 28413.90 189.16 0.24 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 765.13 28426.90 189.65 0.56 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 765.98 28577.40 193.10 0.05 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 766.33 28626.40 192.82 0.16 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 766.96 28724.30 193.80 0.20 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 767.75 28841.90 193.89 0.34 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 768.12 28902.70 192.69 0.54 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 768.43 28948.60 193.26 0.73 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 768.84 29008.90 192.87 0.49 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 769.74 29150.70 192.26 0.17 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 770.10 29205.30 188.10 0.03 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 770.40 29249.60 192.39 0.97 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 770.93 29323.90 191.01 0.89 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 771.23 29366.10 189.83 0.30 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 771.53 29410.20 189.21 0.66 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 772.87 29609.20 189.24 0.04 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 773.36 29681.20 189.77 0.25 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 773.77 29742.80 191.28 0.27 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 774.41 29837.80 190.97 0.16 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 775.18 29952.10 191.38 1.23 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 775.49 29999.00 191.57 0.22 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 776.19 30101.50 188.25 0.59 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 776.73 30181.70 188.48 0.62 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 777.37 30277.90 186.52 0.08 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 777.60 30312.70 185.99 0.60 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 778.17 30400.50 184.30 0.30 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 779.06 30528.80 182.94 0.43 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 780.26 30713.00 187.14 0.20 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 780.67 30775.70 190.33 0.73 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 781.83 31105.20 188.00 0.06 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 782.60 31356.40 188.48 0.78 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 783.14 31524.10 189.95 0.36 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 783.97 31792.10 193.71 1.23 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 784.06 31818.40 192.93 1.13 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 784.44 31933.90 192.51 0.11 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 784.78 32026.90 193.33 0.43 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 785.49 32079.60 193.91 1.12 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 786.45 32147.50 196.42 0.49 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 786.49 32150.60 196.91 1.31 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 787.85 32307.90 192.47 1.94 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 788.23 32361.20 195.25 0.28 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 788.78 32434.80 194.11 0.53 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 789.26 32511.10 194.61 0.37 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 789.69 32594.60 194.43 0.41 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 790.17 32677.80 195.08 0.29 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 790.40 32714.10 195.94 0.26 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 791.02 32813.10 199.30 2.55 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 791.44 32880.90 196.70 0.80 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 792.22 33009.00 196.33 0.46 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 793.04 33148.30 197.65 0.22 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 793.95 33417.50 196.90 0.54 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 794.22 33491.40 197.13 0.41 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 794.43 33555.30 197.80 0.27 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 795.16 33758.10 200.03 0.69 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 795.38 33841.00 195.63 0.74 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 795.57 33885.70 195.27 0.45 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 795.75 33907.50 194.46 0.66 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 795.91 33925.90 194.47 0.03 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 796.22 33957.00 196.47 0.45 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 796.59 33991.50 195.41 0.33 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 797.34 34064.20 195.93 1.02 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 798.58 34190.30 194.89 0.62 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 799.20 34250.80 195.79 0.76 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 799.81 34312.80 196.27 0.24 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 800.03 34334.40 196.20 0.32 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 802.21 34556.90 199.65 0.74 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 802.70 34602.60 199.49 0.64 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 802.89 34620.00 200.29 0.43 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 803.17 34647.80 198.89 0.98 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 803.82 34710.60 197.16 1.20 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 804.72 34825.60 202.80 0.03 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 805.06 34866.80 203.09 0.48 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 806.90 35089.60 198.78 0.57 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 807.51 35165.80 203.60 0.36 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 808.48 35281.70 205.38 0.10 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 808.90 35337.00 204.47 1.22 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 809.10 35359.40 203.62 0.87 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 809.34 35383.00 201.36 0.26 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 809.90 35445.80 200.30 0.80 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 810.20 35497.10 201.06 1.01 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 810.26 35508.50 202.04 0.90 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 810.38 35530.70 201.89 0.65 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 810.59 35568.00 201.83 0.99 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 811.16 35672.50 201.81 0.24 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 811.36 35701.60 200.50 0.63 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 812.18 35854.60 203.29 1.07 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 812.66 35948.30 198.80 0.37 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 813.41 36086.50 204.12 1.32 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 813.87 36173.10 201.78 0.23 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 814.34 36261.80 200.09 0.63 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 815.68 36506.30 198.96 0.95 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 816.13 36591.80 205.10 1.14 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 816.58 36669.60 203.77 0.16 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 816.85 36712.80 203.75 0.01 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 817.49 36820.20 202.76 1.16 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 818.19 36939.80 203.51 0.23 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 818.69 37023.40 206.36 1.13 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 819.42 37118.60 210.16 0.89 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 819.27 37143.20 207.35 0.16 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 820.33 37296.50 208.25 0.95 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 820.37 37302.00 209.66 0.59 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 820.58 37338.10 206.59 0.12 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 821.14 37431.00 212.51 1.47 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 821.32 37461.30 209.84 0.53 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 822.24 37618.60 214.30 0.40 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 822.41 37647.50 212.14 0.72 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 823.22 37777.20 212.09 1.62 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 823.90 37895.00 214.21 1.09 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 824.51 38000.30 211.21 0.68 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 825.04 38088.50 214.36 1.48 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 825.51 38165.60 208.34 0.59 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 825.66 38192.40 206.52 0.45 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 826.10 38284.20 207.41 0.17 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 826.62 38359.20 208.00 0.67 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 827.00 38412.80 210.79 0.64 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 827.40 38472.90 207.23 0.04 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 827.82 38533.20 210.08 0.40 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 828.10 38573.60 208.23 1.98 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 828.44 38621.80 204.79 0.46 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 828.78 38670.80 204.46 0.74 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 829.16 38723.40 206.54 0.31 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 829.76 38812.60 206.09 0.26 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 830.20 38874.70 205.65 0.02 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 830.79 38955.60 205.99 1.31 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 830.93 38976.80 202.34 1.42 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 831.44 39053.60 204.28 0.68 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 831.92 39120.50 207.32 0.20 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 832.89 39265.70 208.69 1.70 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 833.17 39303.20 209.50 0.47 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 833.30 39319.90 209.33 0.48 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 833.44 39339.80 207.87 0.79 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 833.72 39379.40 204.78 1.06 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 833.89 39402.90 191.53 0.90 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 834.25 39454.40 198.14 1.03 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 834.66 39515.40 200.40 1.36 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 835.38 39621.00 195.70 2.08 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 835.98 39709.20 196.67 1.06 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 836.31 39757.10 193.58 1.16 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 837.21 39885.00 193.87 0.20 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 837.33 39900.50 197.55 0.67 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 837.99 40042.70 192.60 2.21 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 838.28 40112.10 193.08 0.44 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 838.39 40145.30 193.69 0.42 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 839.10 40353.10 193.35 0.43 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 839.75 40540.30 193.84 0.13 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 841.28 40935.10 194.84 1.13 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 841.43 40953.80 194.49 0.90 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 850.69 42386.80 199.15 1.46 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 857.37 43762.50 196.82 0.69 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 861.59 44611.20 204.39 0.69 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 864.44 45230.00 210.42 2.17 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 869.48 46322.70 213.81 0.44 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 870.59 46564.50 210.14 1.41 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 871.60 46782.90 210.31 2.27 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 874.15 47330.30 203.17 0.34 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 877.50 48051.70 198.02 2.08 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University 880.59 48720.30 198.40 0.34 Siple Dome (20-40 kyr BP) Ahn et al. (2014 a) (Nature Communications) Oregon State University