noaa-cave-13733
Santiago Cave, Ecuador 94KYr Speleothem d18O Data
Mosblech, N.A.S.; Bush, M.B.; Gosling, W.D.; Hodell, D.A.; Thomas, L.; van Calsteren, P.; Correa-Metrio, A.; Valencia, B.G.; Curtis, J.H.; van Woesik, R.
Santiago Cave, Ecuador 94KYr Speleothem d18O Data
2013-02-07
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/13733
Investigator
N.A.S.
Mosblech
Investigator
M.B.
Bush
Investigator
W.D.
Gosling
Investigator
D.A.
Hodell
Investigator
L.
Thomas
Investigator
P.
van Calsteren
Investigator
A.
Correa-Metrio
Investigator
B.G.
Valencia
Investigator
J.H.
Curtis
Investigator
R.
van Woesik
earth science
paleoclimate
speleothems
delta 18O,calcium carbonate,null,per mil VPDB,null,speleothems,anomalized,isotope ratio mass spectrometry,N,anomalized from overall record mean
earth science
paleoclimate
speleothems
age,null,null,calendar year before present,null,speleothems,null,null,N,null
earth science
paleoclimate
speleothems
delta 18O,calcium carbonate,null,per mil VPDB,null,speleothems,raw,isotope ratio mass spectrometry,N,null
earth science
paleoclimate
speleothems
delta 18O,calcium carbonate,null,per mil VPDB,null,speleothems,anomalized,isotope ratio mass spectrometry,N,anomalized from next oldest sample
earth science
paleoclimate
speleothems
oxygen isotopes
geoscientificInformation
Meridional Overturning Circulation (MOC)
hydrology
93974 cal yr BP
6147 cal yr BP
Complete
-3.0167
-3.0167
-78.1333
-78.1333
980
980
Continent
South America
Ecuador
Santiago Cave>LATITUDE -3.0167>LONGITUDE -78.1333
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
Nicole A.S. Mosblech, Mark B. Bush, William D. Gosling, David Hodell, Louise Thomas, Peter van Calsteren, Alexander Correa-Metrio, Bryan G. Valencia, Jason Curtis, and Robert van Woesik. 2012.
North Atlantic forcing of Amazonian precipitation during the last ice age.
Nature Geoscience, Vol. 5, No. 11, pp. 817-820.
DOI: 10.1038/ngeo1588
The last glacial period was marked by multiple, abrupt reorganizations of ocean and atmosphere circulation. On thousand-year timescales, slowing of the Atlantic meridional overturning circulation was associated with cooling in the high northern latitudes, whereas strengthened circulation was linked to northern warming. In the tropics, these millennial-scale events were primarily reflected in altered patterns of precipitation. These hydrologic fluctuations induced ecological changes in the Atlantic seaboard and the high Andes, but less is known about the Amazon Basin. Here we reconstruct precipitation over Amazonian Ecuador over the past 94,000 years using a d18O record from speleothems collected in Santiago Cave in western Amazonia. We interpret the variability of the d18O record as changes in the source and amount of precipitation. With the exception of the period between 40,000 and 17,000 years ago, abrupt, high-frequency changes coincide with shifts in North Atlantic circulation, indicating a high-latitude influence on Amazonian precipitation over millennial timescales. On longer timescales, the record shows a relationship to precessional changes in the Earth's orbit. In light of the lack of extreme aridity in our records, we conclude that ecosystems in western Amazonia have not experienced prolonged drying over the past 94,000 years.
STUDY NOTES: Stacked d18O data from four speleothems collected in 2007 from Santiago Cave in the lowland wet forests of western Amazonia, Ecuador.
The composite isotope record consists of 4 speleothems: Sant3 from 6113-9486 years ago (ya); Sant1 from 8449-39460 ya;
Sant5 from 35080-46952 ya; and Sant4 from 40193-93974 ya
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/ecuador/santiago2012.txt
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11