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Global Change Master Directory (GCMD)
California Current Reconstruction from Benthic Isotopes and Alkenone Temperatures
Entry ID: NOAA_NGDC_PALEO_HERBERT


Summary
Abstract: [from NOAA/NGDC/WDC-A Paleoclimatology]
Time series of alkenone unsaturation indices gathered along the
California margin reveal large (40 to 80C) glacial-interglacial
changes in sea surface temperature (SST) over the past 550,000
years. Interglacial times with SSTs equal to or exceeding that of the
Holocene contain peak abundances in the pollen of redwood, the
distinctive component of the temperate rainforest of the northwest
coast of California. In the region now dominated by the California
Current, SSTs warmed 10,000 to 15,000 years in advance of deglaciation
at each of the past five glacial maxima. SSTs did not rise in advance
of deglaciation south of the modern California Current front. Glacial
warming along the California margin therefore is a regional signal of
the weakening of the California Current during times when large ice
sheets reorganized wind systems over the North Pacific. Both the
timing and magnitude of the SST estimates suggest that the Devils Hole
(Nevada) calcite record represents regional but not global
paleotemperatures, and hence does not pose a fundamental challenge to
the orbital ("Milankovitch") theory of the Ice Ages.

Geographic Coverage
 N: 41.0 S: 41.0  E: -126.0  W: -126.0
 Min Depth: 0 M  Max Depth: 3041.6
 N: 32.0 S: 32.0  E: -118.0  W: -118.0
 Min Depth: 0 M  Max Depth: 1783.3 M
 N: 22.0 S: 22.0  E: -109.0  W: -109.0
 Min Depth: 0 M  Max Depth: 624 M

Data Set Citation
Dataset Creator: Herbert, T.D., Schuffert, J.D., Andreasen, D., Heusser, L., Lyle, M., Mix, A., Ravelo, A.C., Stott, L.D., Herguera, J.C.
Dataset Title: California Current Reconstruction from Benthic Isotopes and Alkenone Temperatures
Dataset Series Name: IGBP PAGES/WDCA Contribution Series Number: 2001-058
Dataset Release Date: 2001
Dataset Release Place: Boulder, CO
Dataset Publisher: NOAA/NCDC/WDC Paleoclimatology
Issue Identification: 2001-058
Online Resource: http://www.ncdc.noaa.gov/paleo/pubs/herbert2001/herbert2001.html


Paleo_Temporal_Coverage
Paleo Start Date: 500,000 yb
Paleo Stop Date: 0 ybp
Chrono Unit:


Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > CALIFORNIA


Science Keywords
OCEANS >OCEAN TEMPERATURE >SEA SURFACE TEMPERATURE    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >ISOTOPES    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >MICROFOSSILS    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >SEDIMENTS    [Definition]
PALEOCLIMATE >PALEOCLIMATE RECONSTRUCTIONS >SEA SURFACE TEMPERATURE RECONSTRUCTION    [Definition]


ISO Topic Category
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
GEOSCIENTIFIC INFORMATION
OCEANS


Platform
GROUND-BASED OBSERVATIONS    [Information]


Project
IGBP >International Geosphere-Biosphere Programme    [Information]
PAGES >Past Global Changes, IGBP    [Information]


Quality
See the documentation at:
ftp://ftp.ngdc.noaa.gov/paleo/contributions_by_author/herbert2001/

file: readme_herbert2001.txt

for information on data quality


Access Constraints
None


Use Constraints
None


Keywords
interglacial
SST reconstructions
sea surface temperatures
pollen
ocean sediment cores
ocean drilling program
alkenone paleothermometry


Data Set Progress
COMPLETE


Originating Center
NOAA/NGDC


Data Center
World Data Center for Paleoclimatology, Boulder    [Information]
Data Center URL: http://www.ncdc.noaa.gov/paleo/

Data Center Personnel
Name: WDC/PALEOCLIMATOLOGY, BOULDER
Phone: +1 (303) 497-6160
Fax: +1 (303) 497-6513
Email: paleo at noaa.gov
Contact Address:
World Data Center for Paleoclimatology
NOAA/NCDC Code E/GCx3
325 Broadway
City: Boulder
Province or State: CO
Postal Code: 80303
Country: USA



Distribution
Distribution_Media: online www,ftp
Distribution_Format: ascii, text
Fees: none


Personnel
TIMOTHY D. HERBERT
Role: INVESTIGATOR
Phone: 401-863-1207
Email: timothy_herbert at brown.edu
Contact Address:
Department of Geological Sciences
Brown University
City: Providence
Province or State: RI
Postal Code: 02912
Country: USA


J. D. SCHUFFERT
Role: INVESTIGATOR
Contact Address:
Department of Geological Sciences
Brown University
City: Providence
Province or State: RI
Postal Code: 02912
Country: USA


D. ANDREASEN
Role: INVESTIGATOR
Contact Address:
University of California
City: Santa Cruz
Province or State: CA
Country: USA


MITCHELL W. LYLE
Role: INVESTIGATOR
Phone: 208-426-1167
Email: mlyle at cgiss.boisestate.edu
Contact Address:
Center for Geophysical Investigation of the Shallow Subsurface
Boise State University
City: Boise
Province or State: ID
Postal Code: 83725
Country: USA


ALAN C. MIX
Role: INVESTIGATOR
Email: mix at oce.orst.edu
Contact Address:
Oregon State University
City: Corvallis
Province or State: OR
Postal Code: 97331
Country: USA


ANA C. RAVELO
Role: INVESTIGATOR
Phone: (831) 459-3722
Email: acr at cats.ucsc.edu
Contact Address:
Ocean Sciences Department
University of California
City: Santa Cruz
Province or State: CA
Postal Code: 95064
Country: USA


LOWELL D. STOTT
Role: INVESTIGATOR
Phone: (213) 740-5120
Email: stott at usc.edu
Contact Address:
University of Southern California
Department of Earth Sciences
City: Los Angeles
Province or State: CA
Postal Code: 90089-0740
Country: USA


JUAN CARLOS HERGUERA
Role: INVESTIGATOR
Email: herguera at cicese.mx
Contact Address:
Centro de Investigacisn Cientmfica y de Educacisn
Superior de Ensenada
Country: MEXICO


Publications/References
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.

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)
Extended Metadata Properties
(Click to view more)

Creation and Review Dates
DIF Creation Date: 2001-09-11
Last DIF Revision Date: 2017-08-23



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