noaa-cave-5426
Wang et al. 2001 Hulu Cave Stalagmite Oxygen Isotope Data
Wang, Y.; Cheng, H.; Edwards, R.L.; An, Z.; Wu, J.; Shen, C.-C.; Dorale, J.A.
Wang et al. 2001 Hulu Cave Stalagmite Oxygen Isotope Data
2004-05-01
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/5426
Investigator
Y.
Wang
Investigator
H.
Cheng
Investigator
R.L.
Edwards
Investigator
Z.
An
Investigator
J.
Wu
Investigator
C.-C.
Shen
Investigator
J.A.
Dorale
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
age,null,null,calendar kiloyear before present,null,speleothems,null,null,N,null
earth science
paleoclimate
speleothems
oxygen isotopes
geoscientificInformation
Monsoon
-67780 AD
-9052 AD
69730 cal yr BP
11002 cal yr BP
Complete
32.5
32.5
119.16
119.16
Continent
Asia
Eastern Asia
China
Hulu Cave>LATITUDE 32.5>LONGITUDE 119.16
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
Wang, Y.J., H. Cheng, R.L. Edwards, Z.S. An, J.Y. Wu, C.-C. Shen, and J.A. Dorale. 2001. A High-Resolution Absolute-Dated Late Pleistocene Monsoon Record from Hulu Cave, China. Science, 294, 2345-2348. DOI: 10.1126/science.1064618
Oxygen isotope records of five stalagmites from Hulu Cave near Nanjing bear a remarkable resemblance to oxygen isotope records from Greenland ice cores, suggesting that East Asian Monsoon intensity changed in concert with Greenland temperature between 11,000 and 75,000 years before the present (yr. B.P.). Between 11,000 and 30,000 yr. B.P., the timing of changes in the monsoon, as established with 230Th dates, generally agrees with the timing of temperature changes from the Greenland Ice Sheet Project Two (GISP2) core, which supports GISP2's chronology in this interval. Our record links North Atlantic climate with the meridional transport of heat and moisture from the warmest part of the ocean where the summer East Asian Monsoon originates.
STUDY NOTES: DESCRIPTION:
Hulu Cave Stalagmite Oxygen Isotope Data and 230Th dating.
These data also available as supplementary information for
Wang et al. 2001 and Yuan et al. 2004 from www.sciencemag.org.
DATA:
Items 1. through 3. are as published in Wang et al. 2001.
Items 4. and 5. include extended age and isotope data from stalagmite H82
published by Yuan et al. 2004.
1. d13C (y axis) vs d18O (x axis) linear regression results.
Data are regressed by individual stalagmite, as well as for the whole data set.
Units are in per mil relative to VPDB for both isotope values. Best-fit lines
have negative slopes for all groupings except for PD. The best-fit line for PD
data has a positive slope; however, R2 is relatively low for this stalagmite.
Thus, we observe no strong positive correlations among any groupings, indicating
no evidence for kinetic fractionation.
Stalagmite Slope Intercept Correlation(R2) #data points
MSD -1.23 -14.77 0.629 268
MSL -1.93 -20.76 0.387 285
PD 1 0.39 0.285 149
YT -0.42 -10.48 0.235 338
H82 -0.21 -9.99 0.014 612
MSD+MSL+PD+YT+H82 -0.13 -7.89 0.011 1652
2. 230Th dating
230Th dating of stalagmites from Hulu Cave by TIMS except for stalagmite PD.
Other than one analysis (PD-20, which was done by TIMS), the PD analyses were
performed by magnetic sector ICP-MS. Errors are 2 sigma. Decay
constant values are: lambda230 = 9.1577 x 10-6 year-1, lambda234 = 2.8263
x 10-6 year-1, and lambda238 = 1.55125 x 10-10 year-1. The corrected
230Th ages assume an initial 230Th/232Th atomic ratio of (4.4 ±2.2) x 10-6.
This correction is consistent with calculated initial values
(of 2.6 x 10-6 to 5.5 x 10-6) from 5 high 232Th sub-samples (marked "#").
I and II indicate duplicate analyses. Depths are relative to the top
(youngest surface) of each stalagmite and are measured along the growth axis.
Ages in years B.P. are relative to 1950 A.D.
3. Oxygen isotopic data for stalagmites from Hulu Cave.
Depths are relative to the top (youngest surface) of each stalagmite
and are measured along the growth axis. Ages are established with
230Th ages, band counting, and as described in the text.
"Years BP" refers to years relative to 1950 A.D.
4. 230Th dating results of stalagmite H82 from the Hulu Cave, Nanjing, China.
The error is 2 sigma. Dating results of sample H82-a and b have been reported
in Wang et al. (2001). We have used all of the age data below to assign ages
to the oxygen isotope values in Table S5. These results are in a slightly
refined timescale compared to that presented in Wang et al. (2001).
Corrected 230Th ages assume the initial 230Th/232Th atomic ratio of 4.4 ±2.2 x10-6.
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%.
The half lives and growth rate calculations are as same as Table S2.
5. Oxygen isotopic data for stalagmite H82 from Hulu Cave.
Depths are relative to the top (youngest surface) of each
stalagmite and are measured along the growth axis.
Ages are established with 230Th ages.
"Age-ka" refers to years thousands of years before present,
relative to 1950 AD.
Oxygen data between 140.0 and 165.6 mm are from this study
and the rest from Wang et al. (2001). The distances have been
re-measured and the total distance difference accumulated
over 165.6 mm is within 2mm of the original measurement.
This contributes to a slight refinement in the timescale.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/china/hulu_2001.txt
USA/NOAA
DIF
Version 9.8.4
2019-05-28
2019-05-28