noaa-ocean-6415
South China Sea ODP1148 Neogene Benthic Foraminiferal Isotope Data
Tian, J.; Zhao, Q.; Wang, P.X.; Li, Q.Y.; Cheng, X.
South China Sea ODP1148 Neogene Benthic Foraminiferal Isotope Data
2008-07-01
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/6415
Investigator
J.
Tian
Investigator
Q.
Zhao
Investigator
P.X.
Wang
Investigator
Q.Y.
Li
Investigator
X.
Cheng
earth science
paleoclimate
paleoceanography
delta 13C,Cibicidoides sp.,null,per mil PDB,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
lightness,sediment,null,dimensionless,null,paleoceanography,null,null,N,L* on CIE scale
earth science
paleoclimate
paleoceanography
delta 18O,Uvigerina sp.,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
gamma radiation,sediment,null,count per second,null,paleoceanography,null,null,N,natural radiation signature
earth science
paleoclimate
paleoceanography
depth,null,null,centimeter,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleocean
oxygen isotopes
earth science
paleoclimate
paleocean
carbon isotopes
earth science
paleoclimate
paleocean
physical properties
earth science
paleoclimate
paleocean
age control
geoscientificInformation
23103000 14C yr BP
0 14C yr BP
23103000 cal yr BP
0 cal yr BP
Complete
18.836
18.836
116.566
116.566
-3296
-3296
Ocean
Pacific Ocean
Western Pacific Ocean
South China Sea
ODP 1148>LATITUDE 18.836>LONGITUDE 116.566
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
Tian, J., Q. Zhao, P. Wang, Q. Li, and X. Cheng. 2008. Astronomically modulated Neogene sediment records from the South China Sea. Paleoceanography, 23, PA3210.
General global cooling over the Neogene has been modulated by changes in Earth's orbital parameters. Investigations of deep-sea sediment sequences show that various orbital cycles can dominate climate records for different latitudes or for different time intervals. However, a comprehensive understanding of astronomical imprints over the entire Neogene has been elusive because of the general absence of long, continuous records extending beyond the Pliocene. We present benthic foraminiferal d18O and d13C records over the past 23 Ma at Ocean Drilling Program Site 1148 in the northern South China Sea and construct an astronomically tuned timescale (TJ08) for these records based on natural gamma radiation and color reflectance data at this site. Our results show that a 41 ka cycle has dominated sediment records at this location over the Neogene, displaying a linear response to orbital forcing. A 100 ka cycle has also been significant. However, it is correlated nonlinearly with Earth's orbital variations at the 100 ka band. The sediment records also display a prominent 405 ka cycle. Although this cycle was coherent with orbital forcing during the Oligocene and the early Miocene, it was not coherent with Earth's orbital variations at the 405 ka band over the whole Neogene. Amplification of Northern Hemisphere and Southern Hemisphere glaciation since the middle Miocene may be responsible for this change in sedimentary response. Our benthic foraminifera d18O and d13C records further exhibit amplitude variations with longer periods of 600, 1000, 1200, and 2400 ka. Apparently, these cycles are nonlinear responses to insolation forcing.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/odp1148-tab.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/tian2008
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11