noaa-coral-1891
Peros Banhos Atoll - Oxygen Isotope Data
Pfeiffer, M.; Dullo, W.-C.; Eisenhauer, A.
Peros Banhos Atoll - Oxygen Isotope Data
2004-07-01
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/1891
Investigator
M.
Pfeiffer
Investigator
W.-C.
Dullo
Investigator
A.
Eisenhauer
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 18O,Porites lobata,null,per mil VPDB,null,corals and sclerosponges,interpolated,isotope ratio mass spectrometry,N,null
earth science
paleoclimate
corals and sclerosponges
oxygen isotopes
geoscientificInformation
1961 AD
1995 AD
-11 cal yr BP
-45 cal yr BP
Complete
-5.43
-5.43
71.77
71.77
-2
-2
Ocean
Indian Ocean
Peros Banhos Atoll>LATITUDE -5.43>LONGITUDE 71.77
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
Pfeiffer, M., W.-C. Dullo, and A. Eisenhauer. 2004. Variability of the Intertropical Convergence Zone recorded in coral isotopic records from the central Indian Ocean (Chagos Archipelago). Quaternary Research 61:245-255.
We have analyzed the stable oxygen isotopic composition of two Porites corals from the Chagos Archipelago, which is situated in the geographical center of the Indian Ocean. Coral d18O at this site reliably records temporal variations in precipitation associated with the Intertropical Convergence Zone (ITCZ). Precipitation maxima occur in boreal winter, when the ITCZ forms a narrow band across the Indian Ocean. The Chagos then lies within the center of the ITCZ, and rainfall is strongly depleted in d18O. A 120-yr coral isotopic record indicates an alternation of wet and dry intervals lasting 15 to 20 yr. The most recent 2 decades are dominated by interannual variability, which is tightly coupled to the El Nino-Southern Oscillation (ENSO). This is unprecedented in the 120 yr of coral record. As the ITCZ is governed by atmospheric dynamics, this provides evidence of a major change in the coupled ENSO-monsoon system.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/chagos2004.txt
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11