noaa-other-16993 Deep Sea Sediment 1.5 Million Year Foraminiferal Amino Acid Racemization Data Kaufman, D.S.; Cooper, K.; Behl, R.J.; Billups, K.; Bright, J.; Gardner, K.; Hearty, P.; Jakobsson, M.; Mendes, I.; O'Leary, M.; Polyak, L.; Rasmussen, T.L.; Rosa, F.; Schmidt, M.W. Deep Sea Sediment 1.5 Million Year Foraminiferal Amino Acid Racemization Data 2014-07-23 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/16993 Investigator D.S. Kaufman Investigator K. Cooper Investigator R.J. Behl Investigator K. Billups Investigator J. Bright Investigator K. Gardner Investigator P. Hearty Investigator M. Jakobsson Investigator I. Mendes Investigator M. O'Leary Investigator L. Polyak Investigator T.L. Rasmussen Investigator F. Rosa Investigator M.W. Schmidt earth science paleoclimate others geoscientificInformation 1500000 cal yr BP 0 cal yr BP Complete -90 90 -180 180 Geographic Region Global Global>LATITUDE >LONGITUDE 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

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Boulder CO 80305-3328 USA online ASCII Darrell S. Kaufman, Katherine Cooper, Richard Behl, Katharina Billups, Jordon Bright, Karleen Gardner, Paul Hearty, Martin Jakobsson, Isabel Mendes, Michael O'Leary, Leonid Polyak, Tine Rasmussen, Francisca Rosa, and Matthew Schmidt 2013 Quaternary Geochronology 16 50-61 10.1016/j.quageo.2012.07.006 http://www.sciencedirect.com/science/article/pii/S1871101412001537

The deep-sea environment is among the most stable on Earth, making it well suited for amino acid geochronology. Foraminifera with calcareous tests are distributed across the World Ocean and are often recovered in sufficient abundance from sediment cores to derive robust mean amino acid D/L values of multiple replicates from each stratigraphic level. The extent of racemization (D/L) can be compared with independent age control, which in most cases is based on correlation with global marine oxygen-isotope stages and radiocarbon ages from the same stratigraphic levels. In this study, we report the results of amino acid racemization analysis of multiple foraminifera species from well-dated sediment cores taken from the Pacific, Atlantic, and Arctic oceans. The composite of results analyzed to date (179 samples, each composed of an average of 8.6 subsamples = 1531 analyses) show that D/L values generally increase systematically down core, and are similar for samples of comparable ages from different deep-sea sites. Previously published equations that relate D/L values of aspartic and glutamic acids to post-depositional temperature and sample age for Pulleniatina obliquiloculata generally conform to the D/L trends for species analyzed in this study. Laboratory heating experiments were used to quantify the difference in the rate of racemization between P. obliquiloculata and other taxa. For example, aspartic acid in P. obliquiloculata racemizes an average of 12-16% faster than in the common high-latitude species, Neogloboquadrina pachyderma (s). Apparently, the unexpectedly high D/L values previously reported for N. pachyderma (s) older than 35 ka from the Arctic Ocean cannot be attributed to taxonomic effects. STUDY NOTES: Amino acid racemization (AAR) data on mono-specific foraminifera from deep sea sediments. D/L aspartic acid and glutamic acid for multiple foraminifera species from marine sediment cores from the Pacific, Atlantic, and Arctic oceans.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/aar/kaufman2013foram/kaufman2013foram.xls Excel Data File; Deep Sea Foraminiferal AAR Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/aar/kaufman2013foram/kaufman2013foram.txt Text Data File; Deep Sea Foraminiferal AAR Data USA/NOAA DIF Version 9.8.4 2019-03-27 2019-03-27