noaa-ocean-10490
Western Tropical Pacific MD98-2181 MIS3 SST Reconstruction
Saikku, R.; Stott, L.D.; Thunell, R.C.
Western Tropical Pacific MD98-2181 MIS3 SST Reconstruction
2010-05-20
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/10490
Investigator
R.
Saikku
Investigator
L.D.
Stott
Investigator
R.C.
Thunell
earth science
paleoclimate
climate reconstructions|paleoceanography
sea surface temperature,magnesium/calcium,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,G. ruber
earth science
paleoclimate
paleoceanography
delta 18O,benthic foraminifer,null,per mil,null,paleoceanography,null,null,N,Siphouvigerina hispida
earth science
paleoclimate
paleoceanography
magnesium/calcium,Globigerinoides ruber,null,dimensionless,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
age,null,null,calendar year before present,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
depth,null,null,centimeter,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
delta 18O,Globigerinoides ruber,null,per mil,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleocean
oxygen isotopes
earth science
paleoclimate
paleocean
reconstruction
geoscientificInformation
Sea Surface Temperature Reconstruction
57648 cal yr BP
28872 cal yr BP
Complete
6.3
6.3
125.83
125.83
-2114
-2114
Ocean
Pacific Ocean
Western Pacific Ocean
MD98-2181>LATITUDE 6.3>LONGITUDE 125.83
None
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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
325 Broadway, E/NE31
Boulder
CO
80305-3328
USA
online
ASCII
Saikku, R., L. Stott, and R. Thunell. 2009.
A bi-polar signal recorded in the western tropical Pacific:
Northern and Southern Hemisphere climate records from the
Pacific warm pool during the last Ice Age.
Volume 28, Issues 23-24, November 2009, Pages 2374-2385
doi:10.1016/j.quascirev.2009.05.007
Western tropical Pacific sea surface temperatures and Pacific
Deep Water temperatures during Marine Isotope Stage 3 have been
reconstructed from the d18O and Mg/Ca of planktonic and benthic
foraminifera from Marion Dufresne core MD98-2181. This 36m
marine core was collected at 6.3ºN from a water depth of 2114 m.
With sediment accumulation rates of up to 80 cm/ky, it provides
a decadally resolved history of ocean variability during the
Last Glacial period. Surface temperatures and salinities at this
site varied in close association with millennial-scale atmospheric
temperature swings at high northern latitudes as reflected in the
GISP2 ice core. At times of colder atmospheric temperatures over
Greenland, the western Pacific was more saline and summer season
SSTs were ~2ºC colder. These millennial-scale changes within the
tropics are attributed to a southward displacement of the summer
season ITCZ in response to steeper meridional temperature
gradients within the Pacific. The benthic d18O record from
MD98-2181 documents upper Pacific Deep Water temperature
and salinity variability. Benthic d18O variations of 0.3-0.5
per mil during MIS 3 indicate deep waters within the Pacific
were varying by ~1-1.5ºC, with the possibility that some of
the variability was due to changing salinity and minor glacial-
eustatic changes. The observed deep-water variability correlates
to changes in Antarctic surface temperatures and thus reflects
changes in Southern Ocean temperatures at the site of Pacific
Deep Water formation. The combined planktonic and benthic records
from MD98-2181 thus provide a northern and southern hemispheric
climate record of anti-phased variability during MIS 3 as has
been inferred previously from ice core records. Furthermore,
the deep sea temperature excursions appear to have led millennial
variations in atmospheric CO2 as recorded in the EDML ice core
by ~1 kyr.
STUDY NOTES: Stable Isotope and and Mg/Ca data are presented for planktonic
foraminifera along with benthic foramniferal stable isotope data
spanning Marine Isotope Stage 3 from western Pacific marine
sediment core, MD98-2181. The data are used to assess the timing
and magnitude of tropical Pacific surface water temperature change
relative to the timing and magnitude of high latitude temperature
change (as inferred from the benthic stable isotope data).
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/saikku2009/saikku2009.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/saikku2009/saikku2009.xls
USA/NOAA
DIF
Version 9.8.4
2019-04-22
2019-04-22