noaa-cave-9792
New Zealand South Island 30KYr Speleothem Stable Isotope Data
Williams, P.W.; Neil, H.L.; Zhao, J.-x.
New Zealand South Island 30KYr Speleothem Stable Isotope Data
2010-07-22
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/9792
Investigator
P.W.
Williams
Investigator
H.L.
Neil
Investigator
J.-x.
Zhao
earth science
paleoclimate
speleothems
delta 18O,calcium carbonate,null,per mil PDB,null,speleothems,corrected,isotope ratio mass spectrometry,N,corrected for ice volume
earth science
paleoclimate
speleothems
age,null,null,calendar year before present,null,speleothems,null,null,N,null
earth science
paleoclimate
speleothems
delta 13C,calcium carbonate,null,per mil PDB,null,speleothems,raw,isotope ratio mass spectrometry,N,null
earth science
paleoclimate
speleothems
delta 18O,calcium carbonate,null,per mil PDB,null,speleothems,raw,isotope ratio mass spectrometry,N,null
earth science
paleoclimate
speleothems
age control
earth science
paleoclimate
speleothems
trace metals
geoscientificInformation
Last Glacial Maximum
29876 cal yr BP
508 cal yr BP
Complete
-42
-42
172
172
Continent
Australia/New Zealand
New Zealand
NWSI north-west of the South Island>LATITUDE -42>LONGITUDE 172
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
Williams, P.W., H. Neil, and J.-X. Zhao. 2010.
Age frequency distribution and revised stable isotope curves
for New Zealand speleothems: palaeoclimatic implications.
International Journal of Speleology, 39(2), 99-112.
Bologna (Italy). ISSN 0392-6672.
The occurrence of speleothems in New Zealand with reversed magnetism
indicates that secondary calcite deposition in caves has occurred
for more than 780 thousand years (ka). 394 uranium-series dates
on 148 speleothems show that such deposition has taken place
somewhere in the country with little interruption for more than
500 ka. A relative probability distribution of speleothem ages
indicates that most growth occurred in mild, moist interglacial
and interstadial intervals, a conclusion reinforced by comparing
peaks and troughs in the distribution with time series curves
of speleothem d18O and d13C values. The stable isotope time series
were constructed using data from 15 speleothems from two different
regions of the country. The greater the number of overlapping
speleothem series (i.e. the greater the sample depth) for any one
region, the more confidence is justified in considering the stacked
record to be representative of the region. Revising and extending
earlier work, composite records are produced for central-west North
Island (CWNI) and north-west South Island (NWSI). Both demonstrate
that over the last 15 ka the regions responded similarly to global
climatic events, but that the North Island site was also influenced
by the waxing and waning of regional subtropical marine influences
that penetrated from the north but did not reach the higher latitudes
of the South Island. Cooling marking the commencement of the last
glacial maximum (LGM) was evident from about 28 ka. There was a
mid-LGM interstadial at 23-21.7 ka and Termination 1 occurred around
18.1 ka. The glacial-interglacial transition was marked by a series
of negative excursions in d18O that coincide with dated recessional
moraines in South Island glaciers. A late glacial cooling event,
the NZ Late Glacial Reversal, occurred from 13.4-11.2 ka and this
was followed by an early Holocene optimum at 10.8 ka. Comparison
of d18O records from NWSI and EPICA DML ice-core shows climatic
events in New Zealand to lag those in Antarctica by several
centuries to a thousand years. Waxing and waning of subantarctic
and subtropical oceanic influences in the Tasman Sea are
considered the immediate drivers of palaeoclimatic change.
STUDY NOTES: Composite speleothem d18O and d13C data for north-west South Island,
New Zealand. d18O data are ice volume corrected (ivc) assuming
1.2 per mil correction at 20 ka. The original data were published
in Williams et al. (2005) and were based on 8 speleothems with
43 TIMS dates. The new record is constructed from the same 8
speleothems but has 56 dates and 641 stable isotope data points,
and extends from 500 - 30 000 years BP.
Northwest South Island ~42°S, 172°E.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/pacific/south-island2010.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/pacific/south-island2010.xls
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11