noaa-ocean-12545
Northwest Pacific ODP1208 Plio-Pleistocene Stable Isotope Data
Venti, N.L.; Billups, K.
Northwest Pacific ODP1208 Plio-Pleistocene Stable Isotope Data
2012-02-21
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/12545
Investigator
N.L.
Venti
Investigator
K.
Billups
earth science
paleoclimate
paleoceanography
delta 18O,Cibicidoides wuellerstorfi,null,per mil,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
delta 13C,Cibicidoides wuellerstorfi,null,per mil,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
depth,null,null,meter,null,paleoceanography,null,null,N,mbsf
earth science
paleoclimate
paleocean
oxygen isotopes
earth science
paleoclimate
paleocean
carbon isotopes
geoscientificInformation
Milankovitch
3700000 cal yr BP
1760000 cal yr BP
Complete
36.127
36.127
158.2016
158.2016
-3346
-3346
Ocean
Pacific Ocean
North Pacific Ocean
ODP 1208>LATITUDE 36.127>LONGITUDE 158.2016
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
Venti, N.L. and K. Billups. 2012.
Stable-isotope stratigraphy of the Pliocene-Pleistocene
climate transition in the northwestern subtropical Pacific.
Palaeogeography, Palaeoclimatology, Palaeoecology,
published online 11 February 2012.
doi:10.1016/j.palaeo.2012.02.001
From Ocean Drilling Program (ODP) Site 1208 on Shatsky Rise
below the Kuroshio Current Extension, we present the North
Pacific's first orbital-scale benthic foraminiferal d18O
and d13C time series to span the Pliocene-Pleistocene climate
transition. Excellent agreement between the Site 1208 d18O
record and the global d18O stack of Lisiecki and Raymo (2005)
provides orbital-scale age control and confirms continuous
stratigraphy from 3.7 to 1.8 Ma at the single-hole site.
Cross-spectral analysis of the d18O and d13C time series
reveals that these are coherent to 80% confidence at the
41-kyr obliquity band prior to 3.3 Ma (glacial isotope stage M2)
and increase to the 95% level thereafter. Throughout, d18O cycles
consistently lead d13 C cycles by ~ 3 kyr. This suggests that
global-ocean d13C variations, as produced by terrestrial-marine
12C transfers, were responsive to obliquity-induced climate
changes before the Northern Hemisphere glaciations (NHG)
reached mid latitudes at 2.7 Ma. In contrast, 41-kyr carbonate
sedimentation (as derived from sediment reflectance) cycles,
maxima tightly coupled to (>95% confidence) and in phase
with minima in the d18O record, do not emerge until 2.7 Ma.
Foraminiferal fragmentation counts indicate that carbonate
preservation is not the primary process behind enhanced
carbonate deposition during interglacials. Thus, we surmise
that hydrography-related changes in biogenic opal and carbonate
production in surface water best explain glacial-interglacial
carbonate cycles beginning with significant NHG. Firm establishment
of orbital-scale age control on the stratigraphically complete
Site 1208 section now provides a platform for high-resolution
paleoceanographic reconstruction of the relatively understudied
North Pacific.
STUDY NOTES: Foraminiferal stable isotope (d18O and d13C) were measured
via mass spectrometry at orbital-scale resolution (10-cm spacing,
or ~2.5 kyr timestep) for the Pliocene-Pleistocene (1.760-3.700 Ma)
section in tests of the epifaunal benthic foraminifer Planulina
wuellerstorfi. Sample averages only are presented here.
The age model is derived by tuning the d18O record to the global
stack of Lisiecki and Raymo (2005).
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/venti2012/venti2012.xls
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/venti2012/venti2012.txt
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11