noaa-ocean-19461 Southern Continental Margin of Australia Benthic Foraminifera Stable Isotope Data, Lynch-Stieglitz 1994 Lynch-Stieglitz, J.; Fairbanks, R.G.; Charles, C.D. Southern Continental Margin of Australia Benthic Foraminifera Stable Isotope Data, Lynch-Stieglitz 1994 2015-11-16 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/19461 Investigator J. Lynch-Stieglitz Investigator R.G. Fairbanks Investigator C.D. Charles earth science paleoclimate paleoceanography delta 18O,Cibicidoides mundula,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 13C,benthic foraminifer,null,per mil PDB,null,paleoceanography,null,null,N,Cibicidoides robertsonianus earth science paleoclimate paleoceanography delta 18O,Cibicidoides wuellerstorfi,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 18O,Uvigerina sp.,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 13C,Uvigerina sp.,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 13C,Cibicidoides wuellerstorfi,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 13C,Cibicidoides mundula,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 18O,benthic foraminifer,null,per mil PDB,null,paleoceanography,null,null,N,Cibicidoides cicatricosus earth science paleoclimate paleoceanography delta 18O,benthic foraminifer,null,per mil PDB,null,paleoceanography,null,null,N,Globobulimina sp. earth science paleoclimate paleoceanography longitude,null,null,degree east,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 18O,Cibicidoides pachyderma,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 13C,benthic foraminifer,null,per mil PDB,null,paleoceanography,null,null,N,Cibicidoides cicatricosus earth science paleoclimate paleoceanography delta 13C,Cibicidoides pachyderma,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,C,Core name earth science paleoclimate paleoceanography delta 18O,benthic foraminifer,null,per mil PDB,null,paleoceanography,null,null,N,Cibicidoides robertsonianus earth science paleoclimate paleoceanography delta 13C,benthic foraminifer,null,per mil PDB,null,paleoceanography,null,null,N,Globobulimina sp. earth science paleoclimate paleoceanography latitude,null,null,degree north,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography depth,null,null,centimeter,null,paleoceanography,null,null,N,null earth science paleoclimate paleocean oxygen isotopes earth science paleoclimate paleocean carbon isotopes geoscientificInformation Complete -42.31 -37.55 138.583 144.59 Ocean Indian Ocean Southeast Continental Margin of Australia>LATITUDE -40>LONGITUDE 141.5 None Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

325 Broadway, E/NE31

Boulder CO 80305-3328 USA online ASCII Lynch-Stieglitz, J., R.G. Fairbanks, and C.D. Charles 1994 Paleoceanography 9 1 7-29 10.1029/93PA02446

Sediment cores from the southern continental margin of Australia are near the formation region of Antarctic Intermediate Water (AAIW) and Subantarctic Mode Water and record the changes in these water masses from the last glacial maximum through the present. Carbon and oxygen isotopes were measured on the benthic foraminiferal species Planulina wuellerstrorfi for both the Recent and last glacial maximum sections of the cores and were then used to reconstruct temperature and carbon isotopic water column profiles. The glacial oxygen isotope profile indicates a vertical temperature structure for this region similar to that in today's Subantarctic Zone. Although intermediate water d13C cannot be used as a nutrient tracer in this region because of the large influence of air-sea carbon isotopic exchange on this water mass, d13C can be used as a water mass tracer. Today, AAIW properties reflect contributions from cool, fresh Antarctic Surface Waters (2/3) and warm, salty waters from the Indian Ocean (1/3). When examined in conjuction with the glacial d13C and d18C data from the north Indian and Southern Oceans, our data suggest a much reduced contribution of North Indian Ocean intermediate water to glacial Antarctic Intermediate Water relative to the contribution of Antarctic Surface Water. This fresher, cooler glacial Antarctic Intermediate Water would be distributed to the intermediate-depth ocean, thus decreasing the transport of salt produced in the North Indian Ocean to the rest of the world's oceans. Combined with evidence for a reduced influence of North Atlantic Deep Water, these results suggest major changes in the pathways for the redistribution of heat and salt in the glacial ocean. STUDY NOTES: Sample preparation notes- Common acid bath, MAT 251, roasted before analysis, measurements on grouped foraminifera Data comes from these South Indian Ocean cores: Core Name Lat Lon Depth RS67-GC3 -37.55 138.583 1476 m RS67-GC13 -38.465 140.167 2525 m RS67-GC16 -38.333 140.182 1650 m RS67-GC27 -38.648 141.192 506 m RS67-GC52 -41.182 143.958 1145 m RS78-GC18 -41.385 144.233 814 m SO36-SL7 -42.31 144.67 1085 m SO36-SL17 -42.05 144.59 1042 m VM18-222 -38.567 140.617 1904 m Provided Keywords: Australia, benthic foraminifera, isotopes, Last Glacial Maximum

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lynch-stieglitz1994/lynch-stieglitz1994.txt Formatted Text File; Foram Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11