Sea-level and Deep Water Temperature 430KYr Reconstructions Waelbroeck, C.; Labeyrie, L.D.; Michel, E.; Duplessy, J.-C.; McManus, J.F.; Lambeck, K.; Balbon, E.; Labracherie, M. Waelbroeck, C. Labeyrie, L.D. Michel, E. Duplessy, J.-C. McManus, J.F. Lambeck, K. Balbon, E. Labracherie, M. Sea Level Reconstruction sea level earth science/paleoclimate/paleocean (ODP 677>LATITUDE 1.2>LONGITUDE -83.73) (NA87-22>LATITUDE 55.5>LONGITUDE -14.7) (MD94-101>LATITUDE -42.5>LONGITUDE 79.4167) We show that robust regressions can be established between relative sea-level (RSL) data and benthic foraminifera oxygen isotopic ratios from the North Atlantic and Equatorial Pacific Ocean over the last climatic cycle. We then apply these regressions to long benthic isotopic records retrieved at one North Atlantic and one Equatorial Pacific site to build a composite RSL curve, as well as the associated confidence interval, over the last four climatic cycles. Our proposed reconstruction of RSL is in good agreement with the sparse RSL data available prior to the last climatic cycle. We compute bottom water temperature changes at the two sites and at one Southern Indian Ocean site, taking into account potential variations in North Atlantic local deep-water d18O. Our results indicate that a Last Glacial Maximum (LGM) enrichment of the ocean mean oxygen isotopic ratio of 0.95% is the lowest value compatible with unfrozen deep waters in the Southern Indian Ocean if local deep water d18O did not increase during glacials with respect to present. Such a value of the LGM mean ocean isotopic enrichment would impose a maximum decrease in local bottom water d18O at the North Atlantic site of 0.30% during glacials. STUDY NOTES: Reconstructed global mean ocean d18O and sea level, plus computed deep water temperature for the North Atlantic, South Indian, and Equatorial Pacific Oceans, derived from benthic foraminifera oxygen isotopes, as described in Waelbroeck et al. (2002). Age model is based on 14C then SPECMAP, and has been adjusted around Termination II to be consistent with coral U-Th dates. North Atlantic deep water temperature is derived from a splice of benthic d18O records from 3 neighboring cores: NA87-22 (55°30'N, 14°42'W, 2161 m), NA87-25 (55°12'N, 14°45'W, 2320 m), and ODP980 (55°29'N, 14°42'W, 2179 m). South Indian site deep water temperature is derived from core MD94-101 (42°30'S, 79°25'E, 2920 m) benthic d18O. Equatorial Pacific deep water temperature is derived from a splice of benthic d18O records from 2 neighboring cores: V19-30 (03°21'S, 83°21'W, 3091 m) and ODP677 (01°12'N, 83°44'W, 3461 m). NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Waelbroeck, C. Investigator : Labeyrie, L.D. Investigator : Michel, E. Investigator : Duplessy, J.-C. Investigator : McManus, J.F. Investigator : Lambeck, K. Investigator : Balbon, E. Investigator : Labracherie, M. 2010-11-16 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/10496 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/waelbroeck2002/waelbroeck2002.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/waelbroeck2002/waelbroeck2002.xls https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/waelbroeck2002/waelbroeck2002.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/waelbroeck2002/waelbroeck2002.xls English https://www.ncdc.noaa.gov/paleo/study/10496 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/waelbroeck2002/waelbroeck2002.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/waelbroeck2002/waelbroeck2002.xls Waelbroeck, C., L. Labeyrie, E. Michel, J.C. Duplessy, J. McManus, K. Lambeck, E. Balbon, and M. Labracherie. 2002. Sea-level and deep water temperature changes derived from benthic foraminifera isotopic records. Quaternary Science Reviews, Vol. 21, pp. 295-305. START YEAR: 429500 cal yr BP * END YEAR: 500 cal yr BP -83.73 -42.5 79.4167 55.5