noaa-ocean-2622
Eastern Equatorial Pacific Glacial Planktonic Oxygen Isotope Data
Koutavas, A.; Lynch-Stieglitz, J.
Eastern Equatorial Pacific Glacial Planktonic Oxygen Isotope Data
2003-07-01
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/2622
Investigator
A.
Koutavas
Investigator
J.
Lynch-Stieglitz
earth science
paleoclimate
paleoceanography
delta 13C,Trilobatus sacculifer,null,per mil PDB,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
delta 18O,Trilobatus sacculifer,null,per mil PDB,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
age,null,null,radiocarbon year before present,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
delta 13C,Globigerinoides ruber,null,per mil PDB,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 PDB,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleocean
oxygen isotopes
earth science
paleoclimate
paleocean
carbon isotopes
earth science
paleoclimate
paleocean
age control
geoscientificInformation
34642 14C yr BP
790 14C yr BP
39795 cal yr BP
735 cal yr BP
Complete
-5.52
.95
-106.77
-82.07
-3182
-617
Ocean
Pacific Ocean
South Pacific Ocean
V19-27>LATITUDE -.47>LONGITUDE -82.07
Ocean
Pacific Ocean
South Pacific Ocean
RC11-238>LATITUDE -1.52>LONGITUDE -85.82
Ocean
Pacific Ocean
South Pacific Ocean
V21-30>LATITUDE -1.22>LONGITUDE -89.68
Ocean
Pacific Ocean
Eastern Pacific Ocean
RC8-102>LATITUDE -1.42>LONGITUDE -86.85
Ocean
Pacific Ocean
South Pacific Ocean
V21-40>LATITUDE -5.52>LONGITUDE -106.77
Ocean
Pacific Ocean
South Pacific Ocean
V19-28>LATITUDE -2.37>LONGITUDE -84.65
Ocean
Pacific Ocean
North Pacific Ocean
V21-29>LATITUDE .95>LONGITUDE -89.35
Ocean
Pacific Ocean
South Pacific Ocean
RC13-140>LATITUDE -2.87>LONGITUDE -87.75
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
Koutavas, A. and J. Lynch-Stieglitz. 2003. Glacial-interglacial dynamics of the eastern equatorial Pacific cold tongue-Intertropical Convergence Zone system reconstructed from oxygen isotope records. Paleoceanography 18(4), 1089.
We use planktonic oxygen isotope (d18O) records spanning the last 30,000 years (kyr) to constrain the magnitude and spatial pattern of glacial cooling in the upwelling environment of the eastern equatorial Pacific (EEP). Fourteen new downcore d18O records were obtained from surface-dwelling planktonic foraminifera Globigerinoides sacculifer and Globigerinoides ruber in eight cores from the upwelling tongue of the EEP. All sites have sedimentation rates exceeding 5 cm/kyr and, with one exception, lie above the modern depth of the foraminiferal lysocline. Sites directly underlying the cool band of upwelling immediately south of the equator record mean late Holocene (LH)-Last Glacial Maximum (LGM) d18O amplitudes ranging between 1.0 and 1.3%. We estimate that mean sea surface temperatures (SST) in this region during the LGM were on average 1.5 ą 0.5C lower than the LH. Larger d18O amplitudes are observed in sites north of the equator, indicating a spatial pattern of reduced meridional SST gradient across the equator during the LGM. This result is supported by comparison of Mg/Ca SST reconstructions from two sites straddling the equator. We interpret the reduction of this gradient during the LGM as evidence for a less intense cold tongue-Intertropical Convergence Zone (ITCZ) frontal system, a more southerly position of the ITCZ, and weaker southeast equatorial trades in the EEP.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/r13-140k-tab.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v21-30-k-tab.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/rc8-102k-tab.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v21-29-k-tab.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/koutavas2003
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v21-40-tab.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v19-27-k-tab.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v19-28-k-tab.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/r11-238k-tab.txt
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11