noaa-icecore-11748
Antarctic Ice Core Deglacial Water Isotope Data on GICC05 Timescale
Pedro, J.B.; van Ommen, T.D.; Rasmussen, S.O.; Morgan, V.I.; Chappellaz, J.A.; Moy, A.D.; Masson-Delmotte, V.; Delmotte, M.
Antarctic Ice Core Deglacial Water Isotope Data on GICC05 Timescale
2011-06-26
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/11748
Investigator
J.B.
Pedro
Investigator
T.D.
van Ommen
Investigator
S.O.
Rasmussen
Investigator
V.I.
Morgan
Investigator
J.A.
Chappellaz
Investigator
A.D.
Moy
Investigator
V.
Masson-Delmotte
Investigator
M.
Delmotte
earth science
paleoclimate
ice cores
ice age,null,null,calendar year before present,null,ice cores,null,null,N,AICC12
earth science
paleoclimate
ice cores
delta 18O,bulk ice,null,standard deviation unit,null,ice cores,interpolated|normalized,null,N,null
earth science
paleoclimate
ice cores
delta 18O,bulk ice,null,per mil SMOW,null,ice cores,interpolated,null,N,null
earth science
paleoclimate
ice cores
depth,null,null,meter,null,ice cores,null,null,N,null
earth science
paleoclimate
ice cores
delta 18O,bulk ice,null,standard deviation unit,null,ice cores,composited|interpolated|normalized,null,N,null
earth science
paleoclimate
ice cores
delta 2H,bulk ice,null,per mil SMOW,null,ice cores,interpolated,null,N,(dD-10)/8
earth science
paleoclimate
ice cores
delta 2H,bulk ice,null,per mil SMOW,null,ice cores,interpolated,null,N,null
earth science
paleoclimate
ice core
oxygen isotopes
earth science
paleoclimate
ice core
hydrogen isotopes
geoscientificInformation
21000 cal yr BP
9000 cal yr BP
Complete
-81.65
-66.73
-148.82
159.1
621
2892
Continent
Antarctica
Siple Dome>LATITUDE -81.65>LONGITUDE -148.82
Continent
Antarctica
Byrd>LATITUDE -80.02>LONGITUDE -119.52
Continent
Antarctica
EPICA Dronning Maud Land>LATITUDE -75>LONGITUDE .07
Continent
Antarctica
Talos Dome>LATITUDE -72.8>LONGITUDE 159.1
Continent
Antarctica
Law Dome>LATITUDE -66.73>LONGITUDE 112.83
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
Pedro, J.B., T.D. van Ommen, S.O Rasmussen, V.I. Morgan,
J. Chappellaz, A.D. Moy, V. Masson-Delmotte, and M. Delmotte. 2011.
The last deglaciation: timing the bipolar seesaw.
Climate of the Past, Vol. 7, No. pp. 671-683.
doi:10.5194/cp-7-671-2011
Precise information on the relative timing of north-south climate
variations is a key to resolving questions concerning the mechanisms
that force and couple climate changes between the hemispheres.
We present a new composite record made from five well-resolved
Antarctic ice core records that robustly represents the timing
of regional Antarctic climate change during the last deglaciation.
Using fast variations in global methane gas concentrations as time
markers, the Antarctic composite is directly compared to Greenland
ice core records, allowing a detailed mapping of the inter-
hemispheric sequence of climate changes. Consistent with prior
studies the synchronized records show that warming (and cooling)
trends in Antarctica closely match cold (and warm) periods in
Greenland on millennial timescales. For the first time, we also
identify a sub-millennial component to the interhemispheric coupling.
Within the Antarctic Cold Reversal the strongest Antarctic cooling
occurs during the pronounced northern warmth of the Bølling.
Warming then resumes in Antarctica, potentially as early as
the Intra-Allerød Cold Period, but with dating uncertainty that
could place it as late as the onset of the Younger Dryas stadial.
There is little-to-no time lag between climate transitions in
Greenland and opposing changes in Antarctica. Our results lend
support to fast acting inter-hemispheric coupling mechanisms,
including recently proposed bipolar atmospheric teleconnections
and/or rapid bipolar ocean teleconnections.
STUDY NOTES: Stable water isotope data from five high-resolution Antarctic ice
cores spanning the last deglaciation, methane synchronized to the
Greenland Ice Core 2005 Chronology (GICC05), plus a composite
(or weighted average) of the five cores.
The five cores used in the Antarctic deglacial water isotope
composite are: Law Dome, Byrd, EPICA Dronning Maud Land (EDML),
Siple Dome, and Talos Dome. The data for each core is interpolated
to 20 year time steps and standardised with respect to its own mean
and standard deviation over the interval 9000 to 21000 years before
1950 AD (9-21 ka BP 1950). Estimated dating uncertainty in the
composite (relative to GICC05) is ± 220 y during the interval
10-13 ka BP, ± 200 y during the interval 13- 15 ka BP,
and ± 380 y during the interval i.e. 15-18 ka BP.
Refer to Pedro et al., (2011) (Table 2) and original references
for dating uncertainties in the individual cores.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2011iso.xls
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2011iso.txt
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11