noaa-ocean-13134
Southeast Atlantic ODP1262 Upper Paleocene/Lower Eocene Isotope Data
Zachos, J.C.; McCarren, H.; Murphy, B.; Röhl, U.; Westerhold, T.
Southeast Atlantic ODP1262 Upper Paleocene/Lower Eocene Isotope Data
2012-07-10
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/13134
Investigator
J.C.
Zachos
Investigator
H.
McCarren
Investigator
B.
Murphy
Investigator
U.
Röhl
Investigator
T.
Westerhold
earth science
paleoclimate
paleoceanography
depth,null,null,meter,null,paleoceanography,composited,null,N,null
earth science
paleoclimate
paleoceanography
age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
delta 18O,carbonate,null,per mil,null,paleoceanography,null,null,N,bulk sediment
earth science
paleoclimate
paleoceanography
delta 13C,carbonate,null,per mil,null,paleoceanography,null,null,N,bulk sediment
earth science
paleoclimate
paleocean
oxygen isotopes
earth science
paleoclimate
paleocean
carbon isotopes
geoscientificInformation
carbon cycle
56600000 cal yr BP
52100000 cal yr BP
Complete
-27.186
-27.186
1.577
1.577
-4755
-4755
Ocean
Atlantic Ocean
South Atlantic Ocean
ODP 1262>LATITUDE -27.186>LONGITUDE 1.577
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
Zachos, J.C., H. McCarren, B. Murphy, U. Röhl, and T. Westerhold. 2010.
Tempo and Scale of Late Paleocene and Early Eocene Carbon Isotope
Cycles: Implications for the Origin of Hyperthermals.
Earth Planet. Sci. Lett., Vol. 299, pp. 242-249.
doi:10.1016/j.epsl.2010.09.004
The upper Paleocene and lower Eocene are marked by several prominent
(>1‰) carbon isotope (d13C) excursions (CIE) that coincide with
transient global warmings, or thermal maxima, including the
Paleocene-Eocene Thermal Maximum (PETM). The CIE, which are recorded
mainly in marine sedimentary sequences, have also been identified
in continental sequences, occurred episodically, and yet appear
to be paced or triggered by orbital forcing. To constrain the timing
and scale of the CIE relative to long-term baseline variability,
we have constructed a 4.52 million year (myr) long, high-resolution
(~3 kyr) bulk sediment carbon isotope record spanning the lower
Eocene to upper Paleocene (C25r-C24n) from a pelagic sediment section
recovered at ODP Site 1262 in the southeast Atlantic. This section,
which was orbitally-tuned utilizing high-resolution core log physical
property and geochemical records, is the most stratigraphically
complete upper Paleocene to lower Eocene sequence recovered to date.
Time-series analysis of the carbon isotope record along with a high-
resolution Fe intensity record obtained by XRF core scanner reveal
cyclicity with variance concentrated primarily in the precession
(21 kyr) and eccentricity bands (100 and 400-kyr) throughout the
upper Paleocene-lower Eocene. In general, minima in d13C correspond
with peaks in Fe (i.e., carbonate dissolution), both of which appear
to be in phase with maxima in eccentricity. This covariance is
consistent with excess oceanic uptake of isotopically depleted
carbon resulting in lower carbonate saturation during periods
of high eccentricity. This relationship includes all late Paleocene
and early Eocene CIE confirming pacing by orbital forcing. The lone
exception is the PETM, which appears to be out of phase with the
400-kyr cycle, though possibly in phase with the 100-kyr cycle,
reinforcing the notion that a mechanism other than orbital forcing
and/or an additional source of carbon is required to account for
the occurrence and unusual scale of this event.
STUDY NOTES: Bulk sediment carbon and oxygen isotope record for
the composite sections from Ocean Drilling Program
Holes 1262A, B, and C.
ODP Site 1262: 27°11.160'S, 1°34.620'E, 4755m water depth
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/zachos2010/zachos2010.xls
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/zachos2010/zachos2010.txt
USA/NOAA
DIF
Version 9.8.4
2019-02-12
2019-02-12