noaa-coral-1923
Cocos (Keeling) Islands - Radiocarbon Data
Hua, Q.; Woodroffe, C.D.; Smithers, S.G.; Barbetti, M.; Fink, D.
Cocos (Keeling) Islands - Radiocarbon Data
2005-07-01
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/1923
Investigator
Q.
Hua
Investigator
C.D.
Woodroffe
Investigator
S.G.
Smithers
Investigator
M.
Barbetti
Investigator
D.
Fink
earth science
paleoclimate
corals and sclerosponges
sample identification,null,null,null,null,corals and sclerosponges,null,null,C,null
earth science
paleoclimate
corals and sclerosponges
age,null,null,year Common Era,null,corals and sclerosponges,null,null,N,null
earth science
paleoclimate
corals and sclerosponges
Delta 14C,Porites sp.,one standard deviation,per mil NBS oxalic acid,null,corals and sclerosponges,raw,accelerator mass spectrometry,N,null
earth science
paleoclimate
corals and sclerosponges
Delta 14C,Porites sp.,null,per mil NBS oxalic acid,null,corals and sclerosponges,raw,accelerator mass spectrometry,N,null
earth science
paleoclimate
corals and sclerosponges
carbon isotopes
geoscientificInformation
1955 AD
1985 AD
-5 cal yr BP
-35 cal yr BP
Complete
-12.07
-12.07
96.82
96.82
Continent
Australia/New Zealand
Australia
Cocos (Keeling) Islands>LATITUDE -12.07>LONGITUDE 96.82
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
Hua, Q., C.D. Woodroffe, S.G. Smithers, M. Barbetti, and D. Fink. 2005. Radiocarbon in corals from the Cocos (Keeling) Islands and implications for Indian Ocean circulation. Geophys. Res. Lett., v.32, L21602.
Annual bands of a Porites coral from the Cocos (Keeling) Islands, eastern Indian Ocean, were analysed by radiocarbon for 1955-1985 AD. A rapid oceanic response of the site to bomb 14C is found, with a maximum D14C value of 132 per mil in 1975. This value is considerably higher than those for the northwestern Indian Ocean, suggesting that surface waters reaching Cocos are not derived from the Arabian Sea. Instead, D14C values for Cocos and those for Watamu (Kenya) agree well over most of the study interval, suggesting that the South Equatorial Current carries 14C-elevated water rather than 14C-depleted water westward across the Indian Ocean. This implies that oceanic upwelling in the northwestern Indian Ocean is spatially confined with little contribution to the upper limb of the global thermohaline circulation.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/hua2005_noaa.txt
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11