noaa-icecore-9898
EPICA Dronning Maud Land Ice Core 64-30KYr CO2 Data
Lüthi, D.; Bereiter, B.; Stauffer, B.; Winkler, R.; Schwander, J.; Kindler, P.; Leuenberger, M.; Kipfstuhl, S.; Capron, E.; Landais, A.; Fischer, H.; Stocker, T.F.
EPICA Dronning Maud Land Ice Core 64-30KYr CO2 Data
2010-10-04
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/9898
Investigator
D.
Lüthi
Investigator
B.
Bereiter
Investigator
B.
Stauffer
Investigator
R.
Winkler
Investigator
J.
Schwander
Investigator
P.
Kindler
Investigator
M.
Leuenberger
Investigator
S.
Kipfstuhl
Investigator
E.
Capron
Investigator
A.
Landais
Investigator
H.
Fischer
Investigator
T.F.
Stocker
earth science
paleoclimate
climate forcing|ice cores
carbon dioxide,bulk atmosphere,one standard deviation,parts per million,null,climate forcing|ice cores,null,null,N,null
earth science
paleoclimate
climate forcing|ice cores
carbon dioxide,bulk atmosphere,null,parts per million,null,climate forcing|ice cores,null,null,N,null
earth science
paleoclimate
ice cores
depth,null,null,meter,null,ice cores,null,null,N,null
earth science
paleoclimate
ice cores
gas age,null,null,calendar year before present,null,ice cores,null,null,N,null
earth science
paleoclimate
ice core
atmospheric gas
geoscientificInformation
carbon cycle
63750 cal yr BP
30775 cal yr BP
Complete
-75
-75
.07
.07
2892
2892
Continent
Antarctica
EPICA Dronning Maud Land>LATITUDE -75>LONGITUDE .07
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
Lüthi, D., B. Bereiter, B. Stauffer, R. Winkler, J. Schwander,
P. Kindler, M. Leuenberger, S. Kipfstuhl, E. Capron, A. Landais,
H. Fischer, and T.F. Stocker. 2010.
CO2 and O2/N2 variations in and just below the bubble-clathrate
transformation zone of Antarctic ice cores.
Earth and Planetary Science Letters, Vol. 297, pp. 226-233.
doi:10.1016/j.epsl.2010.06.023
CO2 measurements on the EPICA (European Project for Ice Coring
in Antarctica) DML ice core in depth levels just below the bubble
ice-clathrate ice transformation zone (1230-2240 m depth) were
performed. In the youngest part (1230-1600 m), they reveal
variations of up to 25 ppmv around the mean atmospheric
concentration within centimetres, corresponding to a snow
deposition interval of a few years. Similar results are found
at corresponding depth regions of the Dome C and the Talos Dome
ice cores. Since we can exclude all hitherto known processes
altering the concentration of CO2 in ice cores, we present
a hypothesis about spatial fractionation of air components
related to episodically increasing clathrate formation followed
by diffusion processes from bubbles to clathrates. This hypothesis
is supported by optical line-scan observations and by O2/N2
measurements at the same depth where strong CO2 variations are
detected. Below the clathrate formation zone, this small-scale
fractionation process is slowly smoothed out, most likely by
diffusion, regaining the initial mean atmospheric concentration.
Although this process compromises the representativeness of a
single CO2 measurement on small ice samples in the clathrate
formation zone of an ice core, it does not affect the mean
atmospheric CO2 concentration if CO2 values are averaged over
a sufficiently long depth scale (>10 cm in case of the EPICA
DML ice core).
STUDY NOTES: CO2 record from the EPICA Dronning Maud Land ice core covering
the time period between 64000 and 30000 yr BP.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/maud/edml-co2-64-30ka.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/maud/edml-co2-64-30ka.xls
USA/NOAA
DIF
Version 9.8.4
2019-05-06
2019-05-06