noaa-ocean-13378
Makassar Strait 14,700 Year Leaf Wax Hydrogen Isotope Data
Tierney, J.E.; Oppo, D.W.; LeGrande, A.N.; Huang, Y.; Rosenthal, Y.; Linsley, B.K.
Makassar Strait 14,700 Year Leaf Wax Hydrogen Isotope Data
2012-10-10
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/13378
Investigator
J.E.
Tierney
Investigator
D.W.
Oppo
Investigator
A.N.
LeGrande
Investigator
Y.
Huang
Investigator
Y.
Rosenthal
Investigator
B.K.
Linsley
earth science
paleoclimate
paleoceanography
delta 2H,C30 n-alkanoic acid,null,per mil,null,paleoceanography,null,null,N,C 30 fatty acid; leaf wax interpretation
earth science
paleoclimate
paleoceanography
age,null,null,calendar year before present,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
delta 2H,C30 n-alkanoic acid,null,per mil,null,paleoceanography,corrected,null,N,C 30 fatty acid; ice-volume corrected; leaf wax interpretation
earth science
paleoclimate
paleoceanography
depth,null,null,centimeter,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleocean
biomarkers
geoscientificInformation
Warm Pool
14759 cal yr BP
60 cal yr BP
Complete
-3.566
-3.566
119.383
119.383
-482
-482
Ocean
Indian Ocean
Indonesia
BJ8-03-70GGC>LATITUDE -3.566>LONGITUDE 119.383
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
Tierney, J.E., D.W. Oppo, A.N. LeGrande, Y. Huang, Y. Rosenthal,
and B.K. Linsley. 2012.
The influence of Indian Ocean atmospheric circulation on Warm Pool
hydroclimate during the Holocene epoch.
Journal of Geophysical Research-Atmospheres, 117(D19), D19108.
doi:10.1029/2012JD018060
Existing paleoclimate data suggest a complex evolution of hydroclimate
within the Indo-Pacific Warm Pool (IPWP) during the Holocene epoch.
Here we introduce a new leaf wax isotope record from Sulawesi,
Indonesia and compare proxy water isotope data with ocean-atmosphere
general circulation model (OAGCM) simulations to identify mechanisms
influencing Holocene IPWP hydroclimate. Modeling simulations suggest
that orbital forcing causes heterogenous changes in precipitation
across the IPWP on a seasonal basis that may account for the
differences in time-evolution of the proxy data at respective sites.
Both the proxies and simulations suggest that precipitation
variability during the September-November (SON) season is important
for hydroclimate in Borneo. The preëminence of the SON season suggests
that a seasonally lagged relationship between the Indian monsoon
and Indian Ocean Walker circulation influences IPWP hydroclimatic
variability during the Holocene.
STUDY NOTES: Hydrogen isotopic (dD) ratios of terrestrial higher plant
leaf waxes (dDwax, C30 fatty acid) in marine sediments
from southwest Sulawesi, Makassar Strait, Indonesia
for the past 14,700 years.
We measured the hydrogen isotopic composition of leaf waxes (dDwax)
in marine sediment core BJ8-03-70GGC, located 12 km off the southwest
shore of Sulawesi in the Makassar Strait. Thirteen radiocarbon dates
constrain the depth- age model for core 70GGC. The age model is
based on a linear interpolation of the depth-age relationship between
calibrated dates with the additional assumption that the top of
the core is equivalent to 0 yr BP. Core 70GGC was sampled every
~100 years downcore, with somewhat higher resolution during the
middle Holocene (near 4 ka) and the Younger Dryas chronozone
(12.7-11.5 ka). dDwax analyses were conducted as previously
described in Tierney et al. [2010], Paleoceanography. Briefly,
freeze-dried sediments were extracted with a solvent mixture
of dichloromethane:methanol (9:1,v/v) using an Accelerated Solvent
Extractor. Leaf waxes were purified from the resulting total lipid
extract via NH2 column chromatography, methylated with methanol
of a known isotopic composition, and then further purified via silica
gel chromatography. The C30 fatty acid was analyzed in triplicate
for its hydrogen isotopic composition via gas chromatography-isotope
ratio monitoring-mass spectrometry (GC-IR-MS), using a Thermo Delta
XL mass spectrometer at Brown University. H2 standard gas calibrated
to VSMOW was injected three times before and after the sample lipid
peaks as an internal standard. In addition, an external fatty acid
methyl ester (FAME) standard of known isotopic composition was run
every nine injections to monitor drift. Isotopic values were
corrected for the added methyl group. Results presented here
are triplicate means, and average triplicate standard error
was 0.7‰.
Core BJ8-03-70GGC: 3.566°S, 119.383°E, 482 meters water depth
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/tierney2012/tierney2012.xls
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/tierney2012/tierney2012.txt
USA/NOAA
DIF
Version 9.8.4
2019-06-06
2019-06-06