Santa Barbara Basin Deglacial Foraminiferal Stable Isotope Data Hill, T.M.; Kennett, J.P.; Pak, D.K.; Behl, R.J.; Robert, C.; Beaufort, L. Hill, T.M. Kennett, J.P. Pak, D.K. Behl, R.J. Robert, C. Beaufort, L. earth science/paleoclimate/paleoceanography (delta 18O,benthic foraminifer,null,per mil PDB,null,paleoceanography,null,null,N,Bolivina argentea >150 microns) earth science/paleoclimate/paleoceanography (delta 18O,Uvigerina peregrina,null,per mil PDB,null,paleoceanography,null,null,N,> 150 microns) earth science/paleoclimate/paleoceanography (delta 13C,Globigerina bulloides,null,per mil PDB,null,paleoceanography,null,null,N,> 150 microns) earth science/paleoclimate/paleoceanography (delta 13C,Uvigerina peregrina,null,per mil PDB,null,paleoceanography,null,null,N,> 150 microns) earth science/paleoclimate/paleoceanography (delta 18O,Globigerina bulloides,null,per mil PDB,null,paleoceanography,null,null,N,> 150 microns) earth science/paleoclimate/paleoceanography (age,null,null,radiocarbon year before present,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (depth,null,null,centimeter,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (delta 13C,benthic foraminifer,null,per mil PDB,null,paleoceanography,null,null,N,Bolivina argentea >150 microns) earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (MD02-2503>LATITUDE 34.28>LONGITUDE -120.03) A new piston core from Santa Barbara Basin, California provides evidence of the timing, magnitude, and character of deglaciation, including evidence of warming prior to Termination IA. IMAGES Site MD02-2503 (570 m water depth) consists of intermittently laminated hemipelagic sediments extending to Interstadial (D/O) event 6 (~34 ka), that accumulated at ~135 cm/ka. During the deglacial episode (16.75-10 ka), d18O values decreased by 3.2 permil in the planktonic species Globigerina bulloides, indicating a total warming of 8-9C recorded by surface-dwelling foraminifera (inferred by removing the 1 permil influence of ice volume change). Similarly, benthic species (Bolivina argentea and Uvigerina peregrina) record a 1.65 permil d18O decrease across the deglacial, interpreted as a 2-3C warming at upper intermediate depths. d18O values of both planktonic and benthics indicate that surface and intermediate waters began to warm ~2 ka prior to Termination IA, beginning at ~16.5 ka. Intermediate water warming exhibits similar structure and synchronous timing with surface waters. These findings are consistent with a growing number of records from around the globe that exhibit pre-Bolling warming prior to Termination IA, and extends the record of such processes to the northern Pacific. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Hill, T.M. Investigator : Kennett, J.P. Investigator : Pak, D.K. Investigator : Behl, R.J. Investigator : Robert, C. Investigator : Beaufort, L. 2006-07-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/5582 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hill2006c https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/m2503-c-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hill2006c https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/m2503-c-tab.txt English https://www.ncdc.noaa.gov/paleo/study/5582 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hill2006c https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/m2503-c-tab.txt Hill, T.M., J.P. Kennett, D.K. Pak, R.J. Behl, C. Robert, L. Beaufort2006Pre-Bolling warming in Santa Barbara Basin, California: surface and intermediate water records of early deglacial warmthQuaternary Science Reviews2521-222935-284510.1016/j.quascirev.2006.03.012https://www.sciencedirect.com/science/article/pii/S0277379106001521 START YEAR: 35757 cal yr BP * END YEAR: 141 cal yr BP -120.03 34.28 -120.03 34.28