noaa-cave-9741
Buckeye Creek Cave 7000 Year Stalagmite Oxygen Isotope Data
Hardt, B.F.; Rowe, H.D.; Springer, G.S.; Cheng, H.; Edwards, R.L.
Buckeye Creek Cave 7000 Year Stalagmite Oxygen Isotope Data
2010-10-07
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/9741
Investigator
B.F.
Hardt
Investigator
H.D.
Rowe
Investigator
G.S.
Springer
Investigator
H.
Cheng
Investigator
R.L.
Edwards
earth science
paleoclimate
speleothems
depth,null,null,millimeter,null,speleothems,null,null,N,null
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
oxygen isotopes
geoscientificInformation
hydrology
7848 cal yr BP
-24 cal yr BP
Complete
37.976
37.976
-80.4
-80.4
600
600
Continent
North America
United States Of America
West Virginia
Buckeye Creek Cave>LATITUDE 37.976>LONGITUDE -80.4
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
Hardt, B., H.D. Rowe, G.S. Springer, H. Cheng, and R.L. Edwards. 2010.
The seasonality of east central North American precipitation based on
three coeval Holocene speleothems from southern West Virginia.
Earth and Planetary Science Letters, Vol. 295, pp. 342-348.
doi:10.1016/j.epsl.2010.04.002
We present a replicated record of Holocene climate change
from a cave in West Virginia, USA. Based on analysis of stable
isotopes in precipitation (d18Ow) from the closest Global Network
of Isotopes in Precipitation (GNIP) station in Coshocton, OH,
we interpret enriched oxygen isotopes in calcite (d18Oc) as
representing an increase in the relative contribution of summer
precipitation to annual totals. Significant coherence between
local summer (July and August) precipitation and the Summer
North Atlantic Oscillation (SNAO) index on multi-decadal
timescales suggests that summer precipitation in our study area
is strongly influenced by changes in the Bermuda High.
A strengthened Bermuda High circulation would increase summer
precipitation amounts in the region and lead to enriched d18Oc
of speleothem calcite. Our d18Oc record achieves maximum values
during the mid-Holocene, consistent with previous studies
indicating an intensified Bermuda High circulation at that time.
At 4.2 ka, d18Oc transitions to lower values at a time when
numerous records around the globe document significant changes
in the hydrologic budget. Over the last 2000 years, there are
intervals of substantially decreased d18Oc, coincident with
aridity in the Yucatan, Alpine glacial advances, and a weakened
Asian summer monsoon.
STUDY NOTES: Oxygen isotope data from three stalagmites collected
in Buckeye Creek Cave, West Virginia. Stalagmites
BCC-2, BCC-4, and BCC-6 were collected >1 km from
the cave entrance and ~35 m below the surface.
Oxygen isotope samples were milled at 1-mm intervals,
with results reported in per mil V-PDB.
Data notes:
Uranium and thorium isotopic compositions and 230Th ages by ICP-MS
Analytical errors are 2s of the mean.
*a d234U = ([234U/238U]activity - 1) x 1000.
*b d234Uinitial corrected was calculated based on 230Th age (T), i.e., d234Uinitial = d234Umeasured X el234*T, and T is corrected age.
*c [230Th/238U]activity = 1 - e-l230T + (d234Umeasured/1000)[l230/(l230 - l234)](1 - e-(l230 - l234) T), where T is the age.
Decay constants are 9.1577 x 10-6 yr-1 for 230Th, 2.8263 x 10-6 yr-1 for 234U, and 1.55125 x 10-10 yr-1 for 238U (Cheng et al., 2000).
*d The degree of detrital 230Th contamination is indicated by the [230Th/232Th] atomic ratio instead of the activity ratio.
*e Age corrections were calculated using an average crustal 230Th/232Th atomic ratio of 4.4 x 10-6 ± 2.2 x 10-6.
Those are the values for a material at secular equilibrium, with the crustal 232Th/238U value of 3.8. The errors are arbitrarily
assumed to be 50%.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/westvirginia/buckeye-creek2010.xls
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/northamerica/usa/westvirginia/buckeye-creek2010.txt
USA/NOAA
DIF
Version 9.8.4
2019-02-20
2019-02-20