New Zealand and Australia Pacific Region d18O and d13C data for the last 30,000 years Sikes, E.L.; Elmore, A.C.; Allen, K.A.; Cook, M.S.; Guilderson, T.P. Sikes, E.L. Elmore, A.C. Allen, K.A. Cook, M.S. Guilderson, T.P. earth science/paleoclimate/paleoceanography (delta 18O,Cibicidoides wuellerstorfi,null,per mil PDB,null,paleoceanography,null,isotope ratio mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (sample identification,null,null,null,null,paleoceanography,null,null,C,core name) earth science/paleoclimate/paleoceanography (collection water depth,null,null,meter,null,paleoceanography,null,null,N,water depth of core site) earth science/paleoclimate/paleoceanography (age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (delta 13C,Cibicidoides wuellerstorfi,null,per mil PDB,null,paleoceanography,null,isotope ratio mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (depth,null,null,centimeter,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (RR0503-87JPC>LATITUDE -37.2635>LONGITUDE 176.6643) (RR0503 41JPC>LATITUDE -39.88>LONGITUDE 177.67) (RR0503-79JPC>LATITUDE -36.9587>LONGITUDE 176.5928) (RS147-GC07>LATITUDE -45.15>LONGITUDE 146.28) (H214>LATITUDE -36.92>LONGITUDE 177.43) (RR0503-125JPC>LATITUDE -36.1983>LONGITUDE 176.8892) (RR0503 83TC/JPC>LATITUDE -36.7375>LONGITUDE 176.6398) (Z2112>LATITUDE -33.53>LONGITUDE 166.53) Changes in ocean circulation are thought to have contributed to lowering glacial atmospheric CO2 levels by enhancing deep ocean sequestration of carbon that was returned to the atmosphere during glacial terminations. High-resolution benthic foraminiferal d13C and d18O records from a depth transect of cores in the Southwest Pacific Ocean presented here provide evidence that both wind-and thermohaline-driven circulation drove CO2from the ocean during the last deglaciation. Shallow geochemical stratification in the glacial Southern Ocean was followed by a short pulse of rapid d13C enrichment to intermediate water depths during Heinrich Stadial1, indicative of better-ventilated intermediate waters co-occurring with documented wind-driven upwelling in the Southern Ocean. Intermediate depth d13C enrichment paused at the start of the Antarctic Cold Reversal (~14.7ka), implying a brief shallow restratification, while deeper layers were progressively flushed of d13C-depleted and d18O-enriched waters, likely caused by the increasing influence of deep waters sourced from the North Atlantic. The coincidence of atmospheric CO2increases with these geochemical shifts in both shallow and deep cores suggests that shifts in both atmospheric and oceanic circulation contributed to the deglacial rise of CO2. STUDY NOTES: Cores in study with location name and age model basis: RR0503 87TC/JPC Bay of Plenty tephrachronology; RR0503 79JPC Bay of Plenty tephrachronology; RR0503 83TC/JPC Bay of Plenty tephrachronology; H214 Bay of Plenty tephrachronology; RR0503 125JPC Bay of Plenty tephrachronology; RR0503 41JPC Bay of Plenty tephrachronology; RS147-GC07 South Tasman Rise 14C AMS; Z2112 Z2112 14C AMS NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Sikes, E.L. Investigator : Elmore, A.C. Investigator : Allen, K.A. Investigator : Cook, M.S. Investigator : Guilderson, T.P. 2017-08-25 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/22585 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/sikes2016/sikes2016-gc07.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/sikes2016/sikes2016-41jpc.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/sikes2016/sikes2016-87tcjpc.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/sikes2016/sikes2016-z2112.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/sikes2016/sikes2016-h214.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/sikes2016/sikes2016-83tcjpc.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/sikes2016/sikes2016-125jpc.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/sikes2016/sikes2016-79jpc.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/sikes2016/sikes2016-gc07.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/sikes2016/sikes2016-41jpc.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/sikes2016/sikes2016-87tcjpc.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/sikes2016/sikes2016-z2112.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/sikes2016/sikes2016-h214.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/sikes2016/sikes2016-83tcjpc.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/sikes2016/sikes2016-125jpc.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/sikes2016/sikes2016-79jpc.txt English https://www.ncdc.noaa.gov/paleo/study/22585 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/sikes2016/sikes2016-gc07.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/sikes2016/sikes2016-41jpc.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/sikes2016/sikes2016-87tcjpc.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/sikes2016/sikes2016-z2112.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/sikes2016/sikes2016-h214.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/sikes2016/sikes2016-83tcjpc.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/sikes2016/sikes2016-125jpc.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/sikes2016/sikes2016-79jpc.txt Sikes, Elisabeth L., Aurora C. Elmore, Katherine A. Allen, Mea S. Cook, and Thomas P. Guilderson2016Glacial water mass structure and rapid d18O and d13C changes during the last glacial termination in the Southwest PacificEarth and Planetary Science Letters45687-9710.1016/j.epsl.2016.09.043http://www.sciencedirect.com/science/article/pii/S0012821X16305234?via%3Dihub START YEAR: 36167 cal yr BP * END YEAR: 0 cal yr BP 146.28 -45.15 177.67 -33.53