Atlantic and Pacific 800 KYr Benthic d18O Stacks Lisiecki, L.E.; Raymo, M.E. Lisiecki, L.E. Raymo, M.E. earth science/paleoclimate/paleoceanography (age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (delta 18O,benthic foraminifer,null,per mil,null,paleoceanography,averaged,null,N,Atlantic sites) earth science/paleoclimate/paleoceanography (delta 18O,benthic foraminifer,null,per mil,null,paleoceanography,averaged,null,N,Pacific sites) earth science/paleoclimate/paleocean (V21-146>LATITUDE 37.67>LONGITUDE 163.02) (ODP 849>LATITUDE .18>LONGITUDE -110.52) (ODP1089>LATITUDE -40.93>LONGITUDE 9.9) (ODP 677>LATITUDE 1.2>LONGITUDE -83.73) (ODP 983>LATITUDE 60.4>LONGITUDE -23.63) (ODP 925>LATITUDE 4.20415>LONGITUDE -43.4889) (ODP 806B>LATITUDE .32>LONGITUDE 159.35) (ODP1146>LATITUDE 19.45>LONGITUDE 116.27) (ODP664B>LATITUDE .1>LONGITUDE -23.23) (ODP 980>LATITUDE 55.48>LONGITUDE -14.7) (ODP1020>LATITUDE 41>LONGITUDE -126.43) (V19-28>LATITUDE -2.37>LONGITUDE -84.65) (ODP 846>LATITUDE -3.095>LONGITUDE -90.81833) (ODP 982>LATITUDE 57.517>LONGITUDE -15.8665) (ODP658C>LATITUDE 20.75>LONGITUDE -18.58) (ODP1012>LATITUDE 32.28>LONGITUDE -118.38) (RC13-229>LATITUDE -26>LONGITUDE 11) (ODP 1090>LATITUDE -42.908333>LONGITUDE 8.9) (ODP1143>LATITUDE 9.37>LONGITUDE 113.28) (ODP 984>LATITUDE 61.43>LONGITUDE -24.08) (ODP1123>LATITUDE -41.78>LONGITUDE -171.5) (ODP 926>LATITUDE 3.72>LONGITUDE -42.92) Benthic d18O is often used as a stratigraphic tool to place marine records on a common age model and as a proxy for the timing of ice volume/sea level change. However, Skinner and Shackleton (2005) found that the timing of benthic d18O change at the last termination differed by 3900 years between one Atlantic site and one Pacific site. These results suggest that benthic d18O change may not always accurately record the timing of deglaciation. We compare benthic d18O records from 20 Atlantic sites and 14 Pacific sites to evaluate systematic differences in the timing of terminations in benthic d18O. Analysis of sedimentation rates derived from the alignment of benthic d18O suggests a statistically significant Atlantic lead over Pacific benthic d18O change during the last six terminations. We estimate an average Pacific benthic d18O lag of 1600 years for Terminations 1-5, slightly larger than the delay expected from ocean mixing rates given that most glacial meltwater probably enters the North Atlantic. We additionally find evidence of ~4000-year Pacific d18O lags at approximately 128 ka and 330 ka, suggesting that stratigraphic correlation of d18O has the potential to generate age model errors of several thousand years during terminations. A simple model demonstrates that these lags can be generated by diachronous temperature changes and do not require slower circulation rates. Most importantly, diachronous benthic d18O responses must be taken into account when comparing Atlantic and Pacific benthic d18O records or when using benthic d18O records as a proxy for the timing of ice volume change. STUDY NOTES: Stacked (averaged) benthic foraminineral d18O records from 20 Atlantic sites and 14 Pacific sites, covering the past 800,000 years. Atlantic records are from ODP sites 980, 982, 983, 984, 552, 607, 664, 502, 658, 659, 925, 926, 927, 928, 929, 1090, and 1089, and sites RC13-229, GeoB1041, and GeoB1214. Pacific records are from ODP sites 677, 846, 849, 1012, 1020, 806, 1123, 1143, and 1146, and sites V19-28, V21-146, PC72, and PC18. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Lisiecki, L.E. Investigator : Raymo, M.E. 2012-07-18 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/13137 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lisiecki2009/lisiecki2009.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lisiecki2009/lisiecki2009.xls https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lisiecki2009/lisiecki2009.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lisiecki2009/lisiecki2009.xls English https://www.ncdc.noaa.gov/paleo/study/13137 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lisiecki2009/lisiecki2009.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lisiecki2009/lisiecki2009.xls Lisiecki, L.E. and M.E. Raymo. 2009. Diachronous benthic d18O responses during late Pleistocene terminations. Paleoceanography, 24, PA3210, doi:10.1029/2009PA001732 START YEAR: 800000 cal yr BP * END YEAR: 0 cal yr BP -171.5 -42.908333 163.02 61.43