[Parameters: Topic='PALEOCLIMATE', Term='OCEAN/LAKE RECORDS', Variable_Level_1='OXYGEN ISOTOPES']
Bahamas Benthic Foraminiferal Isotope DataEntry ID: NOAA_NCDC_PALEO_2000-028
Abstract: Bahamas Benthic Foraminiferal Isotope Data Calibration to VPDB The data are
presented with respect to VPDB based on an published values for NBS-19 of
-2.20 for 18O and 1.95 for 13C. Since they were first published, we have
undertaken an extensive intercalibration of our laboratory with a large segment
of the paleoceanography research community. The results of this
intercalibration are ... published and available from the WDC for
Paleoclimatology: Ostermann, D. R. and W. B. Curry, Calibration of stable
isotope data: An enriched 18O standard used for source gas mixing detection
and correction, Paleoceanography, v. 15, pp. 353-360, 2000.
As a result of this intercalibration, we discovered that our original data
needed a small revision. Thus we provide here both the original data as
published, and the revised data based on our further evaluations of mass
spectrometer performance. The differences between the data sets are small
(<0.05 permil for 13C and ~0.1 permil for 18O), but large enough to warrant
recalculation. The corrections are also dependent on sample size and isotopic
composition, so it is not possible to subtract a constant from the original to
obtain the revised data. It is this revised data that we recommend be used by
individuals interested in this data.
The revised data also contain about 600 more data points than when originally
published - they are included in the revised data as well.
Data Set Citation
Dataset Originator/Creator: W. B. Curry
Dataset Title: Bahamas Benthic Foraminiferal Isotope Data
Dataset Series Name: IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2000-028
Dataset Release Date: 4/2000
Dataset Release Place: Boulder, CO
Dataset Publisher: IGBP PAGES/World Data Center for Paleoclimatology
Issue Identification: 2000-028
Other Citation Details: NOAA/NCDC Paleoclimatology ProgramOnline Resource: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/paleocean/by_contributor/slo...
ISO Topic Category
Data Set Progress
Distribution Media: ftp
Distribution Format: text, excel
Slowey, N. C. and W. B. Curry, 1995, Glacial-integlacial differences in
circulation and carbon cycling within the upper western North Atlantic,
Paleoceanography, v. 10, pp. 715-732, 1995.
Curry, W. B., N. C. Slowey, and G. P. Lohmann, 1993, Oxygen and carbon
isotopic fractionation of aragonitic and calcitic benthic foraminifera on
Little Bahama Bank, Bahamas (abstract), EOS, Transactions of the America
Geophysical Union, v. 74, p. 368, 1993.
The data were added to in several subsequent publications; the data for these contributions are generally available elsewhere, but some is included in the revised file here called "lbb.revised.data.txt":
Marchitto, T. M., W. B. Curry, and D. W. Oppo, 1998, Millennial-scale changes in North Atlantic circulation since the last glaciation, Nature, v. 393, pp. 557-561, 1998.
Curry, W. B., T. M. Marchitto, J. F. McManus, D. W. Oppo, and K. L. Laarkamp, 1999, Millennial-scale changes ventilation of the thermocline, intermediate and deep waters of the Glacial North Atlantic, Geophysical Monograph 112, pp. 59-76, 1999.
Lynch-Stieglitz, J., W. B. Curry, and N. C. Slowey, 1999, A geostrophic
transport estimate for the Florida Current from the oxygen isotope composition of benthic foraminifera. Paleoceanography, v. 14, pp. 360-373, 1999.
Lynch-Stieglitz, J., W. B. Curry, and N. C. Slowey, 1999, Weaker Gulf Stream during the Last Glacial Maximum, Nature, v. 402, pp. 644-648.
Creation and Review Dates
DIF Creation Date: 2006-12-27
Last DIF Revision Date: 2007-07-23