Search Help
Did you find what you were looking for? Yes No
Northwest Pacific Stable Isotope Data and SSS/SST Reconstructions
Entry ID: NOAA_NCDC_PALEO_2004-086

[ Get Data ]

Summary
Abstract: The oxygen isotope records of both benthic and planktonic Foraminifera in five
piston cores, collected from the region between the Oyashio and Kuroshio
Currents near Japan, clearly show the marked latitudinal shifts of these two
currents during the past 25 kyr. Under the present hydrographic condition, a
clear relationship between the sea-surface temperature (SST) and oxygen
isotope differences from benthic to planktonic Foraminifera is observed in
this region. Using this relationship, we find decreased SSTs of 12-13°C
(maximum 15°C) in the southernmost core site at the Last Glacial Maximum
(LGM), indicating the Oyashio Current shifted southward. The SSTs at the
southern two core sites abruptly increased more than 10°C at 10-11 ka,
suggesting the Kuroshio Current shifted northward over these sites at 10-11
ka. In contrast, the northern two core sites have remained under the influence
of the cold Oyashio Current for the past 25 kyr. With the reasonable estimate
of bottom-water temperature decrease of 2.5°C at the LGM, the SSTs estimated
by this new method give exactly the same SST values calculated from Mg/Ca
ratio of planktonic Foraminifera, allowing palaeosea-surface salinities to be
reconstructed. The result suggests that the ice volume effect was 1.0 ± 0.1
per mil at the LGM.

Related URL
Link: GET DATA
Link: GET DATA
Description: Access to documentation and data files


Geographic Coverage
 N: 42.45 S: 42.45  E: 119.32  W: 119.32
 Max Depth: 1083 M
 N: 41.12 S: 41.12  E: 143.52  W: 143.52
 Max Depth: 2098 M
 N: 38.88 S: 38.88  E: 143.37  W: 143.37
 Max Depth: 2352 M
 N: 35.02 S: 35.02  E: 141.78  W: 141.78
 Max Depth: 2224 M

Data Set Citation
Dataset Originator/Creator: Oba, T. and M. Murayama
Dataset Title: Northwest Pacific Stable Isotope Data and SSS/SST Reconstructions
Dataset Series Name: IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2004-086
Dataset Release Date: 12/2004
Dataset Release Place: Boulder, CO
Dataset Publisher: IGBP PAGES/World Data Center for Paleoclimatology
Issue Identification: 2004-086
Other Citation Details: NOAA/NCDC Paleoclimatology Program
Online Resource: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/paleocean/by_contributor/oba...


Paleo_Temporal_Coverage
Paleo Start Date: 25 ka
Paleo Stop Date: 0 ka
Chrono Unit:


Location Keywords
OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > SEA OF JAPAN


Science Keywords
OCEANS >OCEAN CHEMISTRY >STABLE ISOTOPES    [Definition]
OCEANS >OCEAN TEMPERATURE >SEA SURFACE TEMPERATURE    [Definition]
OCEANS >SALINITY/DENSITY >SALINITY    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >ISOTOPES    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >MICROFOSSILS    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >OXYGEN ISOTOPES    [Definition]
PALEOCLIMATE >PALEOCLIMATE RECONSTRUCTIONS >OCEAN SALINITY RECONSTRUCTION    [Definition]
PALEOCLIMATE >PALEOCLIMATE RECONSTRUCTIONS >SEA SURFACE TEMPERATURE RECONSTRUCTION    [Definition]
BIOLOGICAL CLASSIFICATION >PROTISTS >AMOEBOIDS >FORAMINIFERS    [Definition]


ISO Topic Category
GEOSCIENTIFIC INFORMATION


Project
PAGES >Past Global Changes, IGBP    [Information]


Keywords
d18O
dC13
oxygen isotopes
carbon isotopes
SST reconstruction
sea surface salinity reconstruction
SSS


Data Set Progress
COMPLETE


Originating Center
NOAA/NCDC


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: ftp
Distribution_Format: text, excel
Fees: none


Personnel
TADAMICHI OBA
Role: INVESTIGATOR
Contact Address:
Graduate School of Environmental Earth Science
Hokkaido University
Country: Japan


M. MURAYAMA
Role: INVESTIGATOR


Publications/References
Oba, T. and M. Murayama. 2004. Sea-surface temperature and salinity changes
in the northwest Pacific since the Last Glacial Maximum. Journal of
Quaternary Science, Volume 19, Issue 4, Pages 335 - 346.

Creation and Review Dates
DIF Creation Date: 2006-12-18
Last DIF Revision Date: 2016-11-18



Link to Web Site