noaa-cave-10442
Terciopelo Cave, Costa Rica Speleothem Oxygen Isotope Data
Lachniet, M.S.; Johnson, L.; Asmerom, Y.; Burns, S.J.; Polyak, V.J.; Patterson, W.P.; Burt, L.; Azouz, A.
Terciopelo Cave, Costa Rica Speleothem Oxygen Isotope Data
2010-07-09
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/10442
Investigator
M.S.
Lachniet
Investigator
L.
Johnson
Investigator
Y.
Asmerom
Investigator
S.J.
Burns
Investigator
V.J.
Polyak
Investigator
W.P.
Patterson
Investigator
L.
Burt
Investigator
A.
Azouz
earth science
paleoclimate
speleothems
delta 18O,calcium carbonate,null,per mil VPDB,null,speleothems,composited,isotope ratio mass spectrometry,N,Spliced record from three cores with 100-year interpolation
earth science
paleoclimate
speleothems
age,null,null,calendar year before present,null,speleothems,null,null,N,present defined as 2008 CE
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
oxygen isotopes
geoscientificInformation
Intertropical Convergence Zone (ITCZ)
98250 cal yr BP
6560 cal yr BP
Complete
10.1667
10.1667
-85.3333
-85.3333
370
370
Continent
North America
Central America
Costa Rica
Terciopelo Cave>LATITUDE 10.1667>LONGITUDE -85.3333
None
Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site.
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
Lachniet, M.S., L. Johnson, Y. Asmerom, S.J. Burns, V. Polyak,
W.P. Patterson, L. Burt, and A. Azouz. 2009.
Late Quaternary moisture export across Central America and to Greenland:
evidence for tropical rainfall variability from Costa Rican stalagmites.
Quaternary Science Reviews, Vol. 28, pp. 3348-3360.
doi:10.1016/j.quascirev.2009.09.018
We present a high-resolution terrestrial archive of Central American
rainfall over the period 100-24 and 8.1-6.5 ka, based on d18O time
series from U-series dated stalagmites collected from a cave on the
Pacific Coast of Costa Rica. Our results indicate substantial d18O
variability on millennial to orbital time scales that is interpreted
to reflect rainfall variations over the cave site. Correlations with
other paleoclimate proxy records suggest that the rainfall variations
are forced by sea surface temperatures (SST) in the Atlantic and Pacific
Oceans in a fashion analogous to the modern climate cycle. Higher
rainfall is associated with periods of a warm tropical North Atlantic
Ocean and large SST gradients between the Atlantic and Pacific Oceans.
Rainfall variability is likely linked to the intensity and/or latitudinal
position of the intertropical convergence zone (ITCZ). Periods of higher
rainfall in Costa Rica are also associated with an enhanced sea surface
salinity gradient on either side of the isthmus, suggesting greater
freshwater export from the Atlantic Basin when the ITCZ is stronger
and/or in a more northerly position. Further, wet periods in Central
America coincide with high deuterium excess values in Greenland ice,
suggesting a direct link between low latitude SSTs, tropical rainfall,
and moisture delivery to Greenland. Our results indicate that a stronger
tropical hydrological cycle during warm periods and large inter-ocean SST
gradients enhanced the delivery of low latitude moisture to Greenland.
STUDY NOTES: Stalagmite stable oxygen isotope values from Barra Honda National Park,
Costa Rica, over 98 to 24 ka and 8.0 to 6.6 ka. In this tropical location,
rainfall d18O values are inversely correlated with rainfall amount at and
upwind of the sampling location, so the stalagmite d18O data are interpreted
as a paleorainfall proxy record.
We analyzed 1684 d18O subsamples at the Universities of Massachusetts
and Saskatchewan, and at the Las Vegas Isotope Science Laboratory at
the University of Nevada, Las Vegas. Stalagmites CT-5, CT-6, and CT-7
were subsampled for stable isotopes at a 1.0 mm interval, whereas CT-1
was subsampled every 0.5 mm. Samples were analyzed on ThermoElectron
Delta + or Delta V mass spectrometers in Kiel III and IV automated
carbonate preparation devices, where samples were reacted with
phosphoric acid at 70°C to liberate CO2 gas. Values are reported
as ‰ relative to the VPDB standard via regular calibration to an
internal laboratory standard. Precision is better than 0.06‰ for d18O.
A composite time series was created from stalagmites CT-1, -5, and -6
by splicing together the three records. The time series was then
interpolated at a 100 year interval. The d18O data in this file for
the spliced CT-1, CT-5, and CT-6 stalagmites are raw values,
not corrected for change in d18O of ocean. Ages are in yr BP,
where BP is time of U-series analysis of A.D. 2008.
The stalagmites were recovered from Barra Honda National Park,
on the Nicoya Peninsula, Pacific Coast of Costa Rica.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/costa-rica/terciopelo2009.xls
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/costa-rica/terciopelo2009.txt
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11