California Current Reconstruction from Benthic Isotopes and Alkenone Temperatures: Readme file --------------------------------------------------------------------- NOAA Paleoclimatology Program and World Data Center for Paleoclimatology, Boulder --------------------------------------------------------------------- NOTE: PLEASE CITE ORIGINAL REFERENCE WHEN USING THIS DATA!!!!! NAME OF DATA SET: California Current Reconstruction from Benthic Isotopes and Alkenone Temperatures LAST UPDATE: 7/2001 (Original Receipt by WDCA Paleo) CONTRIBUTOR: Timothy Herbert, Brown University IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2001-058 SUGGESTED DATA CITATION: Herbert, T.D., et al., 2001, California Current Reconstruction from Benthic Isotopes and Alkenone Temperatures. IGBP PAGES/World Data Center A for Paleoclimatology Data Contribution Series #2001-058. NOAA/NGDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCE: T.D. Herbert, J.D. Schuffert, D. Andreasen, L. Heusser, M. Lyle, A. Mix, A.C. Ravelo, L.D. Stott, and J.C. Herguera, 2001, Collapse of the California current during glacial maxima linked to climate change on land, Science v. 293: p71-76. ADDITIONAL REFERENCES: Heusser, L.E., M. Lyle, and A. Mix, 2000, Vegetation and climate of the northwest coast of North America during the last 500 k.y.: High resolution pollen evidence from the northern California margin, In Lyle, M., I. Koizumi, C. Richter, and T.C. Moore Jr (eds.), Proc.ODP, Sci. Results, 167, p. 217-226. DeMenocal, P. and L. Baker, 2000, Data Report: Stable isotope data from Sites 1014 and 1020 (0.6-1.2 Ma), In Lyle, M., I. Koizumi, C. Richter, and T.C. Moore Jr (eds.), Proc.ODP, Sci. Results, 167, p. 145-150. Herbert, T.D., J.D. Schuffert, D. Thomas, K. Lange, A. Weinheimer, and J.-C. Herguera, 1998, Depth and seasonality of alkenone production along the California margin inferred from a core-top transect, Paleoceanography, v. 13, p. 263-271. Andreasen, D.H., M. Flower, M. Harvey, S. Chang, and A.C. Ravelo, 2000, Late Pleistocene oxygen and carbon isotopic records from Site 1011, 112, and 1018, In Lyle, M., I. Koizumi, C. Richter, and T.C. Moore Jr (eds.), Proc.ODP, Sci. Results, 167, p. 141-144 [and data set in accompanying CD-ROM) FUNDING SOURCE: U.S. National Science Foundation, Joint Oceanographic Institutions, U.S.-Mexico Foundation For Science, Inter-American Institute for Global Change. GEOGRAPHIC REGION: Coastal California and Baja California PERIOD OF RECORD: 0-790 kyr bp LIST OF FILES: Readme_Herbert2001.txt (this file), ODP1020.txt, ODP1012.txt, LaPaz21p.txt (tab-delimited ASCII text). DESCRIPTION: California Current Reconstruction from Benthic Isotopes and Alkenone Temperatures. 1. ODP 1020 Benthic Isotopes and Alkenone Temperatures Sediment core ODP 1020 41o 0.051'N Latitude 126° 26.024'W Longitude 3041.6 m Water depth Variable name and unit in each column from left to right: ODP Hole Core & section # for sample Top interval samples (cm) Composite depth (Herbert Science 2001 version) Benthic delta 18-O Uk'37 Uk'37 sea surface temperature (degree Celsius) MISSING VALUES HAVE BEEN ASSIGNED A FLAG OF -999 Data Precision: Isotope data from 0-550 ka were run in the lab of Alan Mix at Oregon State University. Isotope data covering Stages 17 through 20 come from Peter DeMenocal, Lamont-Doherty Observatory of Columbia University. Analytical error is ~0.1 per mil. The age model comes from tuning benthic delta 18O to an orbital age model. NOTE ALL AGE MODELS ARE SUBJECT TO REVISION! The Uk'37 data were analyzed at Brown University and have an analytical precision equal to +- 0.15 Degrees Celsius. 2. ODP 1012 benthic isotopes and alkenone temperatures Sediment core ODP 1012 32° 16.97 'N Latitude 118° 23.024'W Longitude 1783.3 m Water depth Variable name and unit in each column from left to right ODP Hole Core & section # for sample Top interval samples (cm) Composite depth (Herbert Science 2001 version) Benthic delta 18-O (in some cases averaged Cibicoides and Uvigerina With species correction applied) Uk'37 Uk'37 sea surface temperature (degree Celsius) MISSING VALUES HAVE BEEN ASSIGNED A FLAG OF -999 Data Precision: Isotope data were run in the lab of Christina Ravelo at U.C. Santa Cruz by D. Andreasen. Analytical error is ~0.1 per mil. The age model comes from tuning benthic delta 18O to an orbital age model- NOTE ALL AGE MODELS ARE SUBJECT TO REVISION! The Uk'37 data were analyzed at Brown University and have an analytical precision equal to +- 0.15 Degrees Celsius. 3. LAPAZ21P benthic isotopes and alkenone sea surface temperatures Sediment core LPAZ21P 22° 59.4 'N Latitude 109° 28.'W Longitude 624 m Water depth Variable name and unit in each column from left to right Core I.D. Core depth (m) Benthic delta 18-O Uk'37 Uk'37 sea surface temperature (degree Celsius) MISSING VALUES HAVE BEEN ASSIGNED A FLAG OF -999 Data Precision: Isotope data were run in the lab of Dr. Chris Charles at U.C. San Diego by J.C. Herguera (CICESE, Mexico). Analytical error is ~0.1 per mil. The age model comes from tuning benthic delta 18O to an orbital age model- NOTE ALL AGE MODELS ARE SUBJECT TO REVISION! The Uk'37 data were analyzed at Brown University and have an analytical precision equal to +- 0.15 Degrees Celsius.