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Antarctic Ice Cores Revised 800KYr CO2 Data

Originator:

Bereiter, B.; Eggleston, S.; Schmitt, J.; Nehrbass-Ahles, C.; Stocker, T.F.; Fischer, H.; Kipfstuhl, S.; Chappellaz, J.A.

Citation Information:

Bereiter, B., S. Eggleston, J. Schmitt, C. Nehrbass-Ahles, T. F. Stocker, H. Fischer, S. Kipfstuhl, J. Chappellaz. 2015. Revision of the EPICA Dome C CO2 record from 800 to 600 kyr before present. Geophysical Research Letters, 42(2), 542-549. doi: 10.1002/2014GL061957

Lat:0, Lon:0

Download Data:

Antarctic Composite
Excel Data File	Antarctic Ice Core Revised Composite and Indivdual Core CO2 Data
NOAA Template File	Antarctic Ice Core Revised Composite CO2 Data

Byrd
NOAA Template File	Antarctic Ice Core Revised Composite CO2 Data - Byrd

Dome C
NOAA Template File	Antarctic Ice Core Revised Composite CO2 Data - Dome C

EPICA Dome C
NOAA Template File	Antarctic Ice Core Revised Composite CO2 Data - EPICA Dome C

EPICA Dronning Maud Land
NOAA Template File	Antarctic Ice Core Revised Composite CO2 Data - EPICA Dronning Maud Land

Law Dome
NOAA Template File	Antarctic Ice Core Revised Composite CO2 Data - Law Dome/South Pole
NOAA Template File	Antarctic Ice Core Revised Composite CO2 Data - Law Dome

Siple Dome
NOAA Template File	Antarctic Ice Core Revised Composite CO2 Data - Siple Dome

Talos Dome TALDICE
NOAA Template File	Antarctic Ice Core Revised Composite CO2 Data - Talos Dome

Taylor Dome
NOAA Template File	Antarctic Ice Core Revised Composite CO2 Data - Taylor Dome

Vostok
NOAA Template File	Antarctic Ice Core Revised Composite CO2 Data - Vostok

WAIS Divide WDC06A
NOAA Template File	Antarctic Ice Core Revised Composite CO2 Data - WAIS

Use Constraints:

Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site.

Distributor:

National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce

Resource Description (data set id):

noaa-icecore-17975

Data Coverage:

Southernmost Latitude: -81.65
Northernmost Latitude: -66.73
Westernmost Longitude: -148.82
Easternmost Longitude: 159.1833
Minimum Elevation: 621 m
Maximum Elevation: 3488 m
Earliest Year: 805669 cal yr BP (-803719 CE)
Most Recent Year: -51 cal yr BP (2001 CE)

Parameters:

earth science>paleoclimate>ice core>atmospheric gas

Variables:

data type	what	material	error	unit	detail	info
CLIMATE FORCINGICE CORES	carbon dioxide	bulk atmosphere		parts per million	compositedcorrected
CLIMATE FORCINGICE CORES	carbon dioxide	bulk atmosphere	one standard deviation	parts per million	compositedcorrected	Where no individual sigma is given we use average for system/record
CLIMATE FORCINGICE CORES	carbon dioxide	bulk atmosphere		parts per million	corrected
CLIMATE FORCINGICE CORES	carbon dioxide	bulk atmosphere	one standard deviation	parts per million	corrected
CLIMATE FORCINGICE CORES	carbon dioxide	bulk atmosphere		parts per million	averagedcorrected	where duplicates are found then the average is taken
CLIMATE FORCINGICE CORES	carbon dioxide	bulk atmosphere	one standard deviation	parts per million	averagedcorrected	where duplicates are found then the average is taken
CLIMATE FORCINGICE CORES	carbon dioxide	bulk atmosphere		parts per million		correcting factor
CLIMATE FORCINGICE CORES	carbon dioxide	bulk atmosphere	two standard deviations lower bound	parts per million
CLIMATE FORCINGICE CORES	carbon dioxide	bulk atmosphere	two standard deviations upper bound	parts per million
CLIMATE FORCINGICE CORES	depth			meter
CLIMATE FORCINGICE CORES	gas age			calendar year before present		Antarctic ice core chronology 2012 (AICC2012 Bazin et al. 2013) except for Law Dome and WAIS and Siple Dome (see Bereiter et al. 2015 for more details); AICC2012: https://doi.org/10.25921/msps-9989
CLIMATE FORCINGICE CORES	gas age			calendar year before present		WDC06A-7
CLIMATE FORCINGICE CORES	gas age			calendar year before present		EDML1 Sz4
CLIMATE FORCINGICE CORES	gas age			calendar year before present		Antarctic ice core chronology 2012 (AICC2012; Bazin et al. 2013; https://doi.org/10.25921/msps-9989)
CLIMATE FORCINGICE CORES	gas age			calendar year before present		TALDICE-1a
CLIMATE FORCINGICE CORES	gas age			calendar year before present		tuned to GICC05/AICC2012 by Ahn et al. (2014); Antarctic ice core chronology 2012 (AICC2012; Bazin et al. 2013; https://doi.org/10.25921/msps-9989)
CLIMATE FORCINGICE CORES	gas age		unspecified margin of error	year
CLIMATE FORCINGICE CORES	gas age			calendar year before present		Rubino et al. 2013
CLIMATE FORCINGICE CORES	gas age			calendar year before present		MacFarling Meure et al. 2006
CLIMATE FORCINGICE CORES	gas age			calendar year before present		EDC3
CLIMATE FORCINGICE CORES	gas age			calendar year before present		AICC2012 synchronization applied in Bereiter et al. (2012); AICC2012: https://doi.org/10.25921/msps-9989
CLIMATE FORCINGICE CORES	gas age			calendar year before present		Ahn2008
CLIMATE FORCINGICE CORES	gas age			calendar year before present		tentatively synchronized on EDC3 gasage
CLIMATE FORCINGICE CORES	notes					publication and laboratory
CLIMATE FORCINGICE CORES	notes					sample type
CLIMATE FORCINGICE CORES	notes					site code

Summary/Abstract:

The European Project for Ice Coring in Antarctica Dome ice core from Dome C (EDC) has allowed for the reconstruction of atmospheric CO2 concentrations for the last 800,000 years. Here we revisit the oldest part of the EDC CO2 record using different air extraction methods and sections of the core. For our established cracker system, we found an analytical artifact, which increases over the deepest 200 m and reaches 10.1 +/- 2.4 ppm in the oldest/deepest part. The governing mechanism is not yet fully understood, but it is related to insufficient gas extraction in combination with ice relaxation during storage and ice structure. The corrected record presented here resolves partly - but not completely - the issue with a different correlation between CO2 and Antarctic temperatures found in this oldest part of the records. In addition, we provide here an update of 800,000 years atmospheric CO2 history including recent studies covering the last glacial cycle.

Study Notes:

Revised EPICA Dome C and Antarctic composite ice core atmospheric CO2 data. This new version of CO2 composite replaces the old version of Luthi et al. (2008), which contains the analytical bias described in Bereiter et al. 2015 and lower quality data in other sections. For details about the improvements relative to the previous version see supplementary information of Bereiter et al. 2015. For detailed references of all records refer to the supplemetary information of Bereiter et al. 2015. For latest anthropogenic data refer to NOAA/Mauna Loa record. Age unit is in years before present (yr BP) where present refers to 1950 AD. Note, not all individual records provided are part of the composite. If millennial scale or smaller details of the composite are studied, we recommend to look into all records available for that period and not only in the composite. Composite built from the following: -51-1800 yr BP: Law Dome (Rubino et al. 2013) 1.8-2 kyr BP: Law Dome (MacFarling Meure et al. 2006; https://doi.org/10.25921/g6kd-k189) 2-11 kyr BP: Dome C (Monnin et al. 2001 + 2004; https://doi.org/10.25921/ggj5-vt17, https://doi.org/10.25921/aktb-0t39) 11-22 kyr BP: WAIS (Marcott et al. 2014) minus 4 ppmv (see text) 22-40 kyr BP: Siple Dome (Ahn et al. 2014) 40-60 kyr BP: TALDICE (Bereiter et al. 2012; https://doi.org/10.25921/4vks-ex31) 60-115 kyr BP: EDML (Bereiter et al. 2012; https://doi.org/10.25921/4vks-ex31) 105-155 kyr BP: Dome C Sublimation (Schneider et al. 2013) 155-393 kyr BP: Vostok (Petit et al. 1999; https://doi.org/10.25921/kcry-ae86) 393-611 kyr BP: Dome C (Siegenthaler et al. 2005) 612-800 kyr BP: Dome C (Bereiter et al. 2014)

More Information:

ICE CORES

Additional References:

Lüthi, D., M. Le Floch, B. Bereiter, T. Blunier, J.-M. Barnola, U. Siegenthaler, D. Raynaud, J. Jouzel, H. Fischer, K. Kawamura, and T.F. Stocker. 2008. High-resolution carbon dioxide concentration record 650,000-800,000 years before present. Nature, 453, 379-382. doi: 10.1038/nature06949

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