Byrd and Siple Dome CO2 data on the GICC05 timescale (9--21 ka)
Entry ID: Byrd-SipleDome-CO2-GICC05

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Summary
Abstract: Antarctic ice cores provide clear evidence of a close coupling between variations in Antarctic temperature and the atmospheric concentration of CO2 during the glacial/interglacial cycles of at least the past 800-thousand years. Precise information on the relative timing of the temperature and CO2 changes can assist in refining our understanding of the physical processes involved in this coupling. Here, we focus on the last deglaciation, 19 000 to 11 000 yr before present, during which CO2 concentrations increased by ~80 parts per million by volume and Antarctic temperature increased by ~10 degrees C.

Utilising a recently developed proxy for regional Antarctic temperature, derived from five near-coastal ice cores and two ice core CO2 records with high dating precision, we show that the increase in CO2 likely lagged the increase in regional Antarctic temperature by less than 400 yr and that even a short lead of CO2 over temperature cannot be excluded. This result, consistent for both CO2 records, implies a faster coupling between temperature and CO2 than previous estimates, which had permitted up to millennial-scale lags.

This work was done as part of project AAS 757.

DESCRIPTION
The regional Antarctic temperature proxy data series is avaliable elsewhere: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2011iso.txt The locations and original references for the CO2 data and transfers to the GICC05 timescale are as follows:

Byrd
Location: 80 degrees 01'S 119 degrees 31'W
Elevation: 1530 m asl
Reference for transfer to GICC05 timescale: Pedro et al., Clim. Past. 8, 2012.
Reference for CO2 data: (1) Neftel, A., Oeschger, H., Staffelbach, T., and
Nature, 331, 609-11, doi:10.1038/331609a0, 1988.
(2) Staffelbach, T., Stauffer, B., Sigg, A., and Oeschger, H.: CO2
measurements from polar ice cores - More data from different
sites, Tellus B, 43, 91-6, doi:10.1034/j.1600-0889.1991.t01-1-
00003.x, 1991.

Siple Dome
Location: 81 degrees 40'S 148 degrees 49'W
Elevation: 621 m asl
Reference for transfer to GICC05 timescale: Pedro et al., Clim. Past. 8, 2012.
Reference for CO2 data:
Ahn, J., Wahlen, M., Deck, B. L., Brook, E. J., Mayewski,
P. A., Taylor, K. C., and White, J. W. C.: A record of atmospheric
CO2 during the last 40,000 years from the Siple
Dome, Antarctica ice core, J. Geophys. Res., 109, D13305,
doi:10.1029/2003JD004415, 2004.

Related URL
Link: GET DATA
Description: Download point for the data


Link: VIEW PROJECT HOME PAGE
Description: Public information for ASAC project 757


Link: VIEW RELATED INFORMATION
Description: Citation reference for this metadata record and dataset


Geographic Coverage
 N: -80.0167 S: -80.0167  E: 119.5167  W: 119.5167
 N: -81.6667 S: -81.6667  E: 148.8167  W: 148.8167

Data Set Citation
Dataset Release Date: 2012-12-17


Temporal Coverage
Start Date: 2012-07-22
Stop Date: 2012-07-22


Location Keywords
CONTINENT > ANTARCTICA
GEOGRAPHIC REGION > POLAR


Science Keywords
CLIMATE INDICATORS >PALEOCLIMATE INDICATORS >ICE CORE RECORDS >CARBON DIOXIDE    [Definition]


ISO Topic Category
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE


Access Constraints
These data are publicly available for download at the provided URL.


Use Constraints
This data set conforms to the PICCCBY Attribution License
(http://creativecommons.org/licenses/by/3.0/).

Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=Byrd-Sip... when using these data.


Keywords
Ice Core
Drilling


Data Set Progress
COMPLETE


Originating Center
Australian Antarctic Division


Data Center
Australian Antarctic Data Centre, Australia    [Information]
Data Center URL: http://data.aad.gov.au

Data Center Personnel
Name: DATA OFFICER AADC
Phone: +61 3 6232 3244
Fax: +61 3 6232 3351
Email: metadata at aad.gov.au
Contact Address:
Australian Antarctic Division
203 Channel Highway
City: Kingston
Province or State: Tasmania
Postal Code: 7050
Country: Australia



Distribution
Distribution_Media: HTTP
Distribution_Size: 16 kb
Distribution_Format: Excel
Fees: Free


Personnel
JOEL PEDRO
Role: INVESTIGATOR
Role: TECHNICAL CONTACT
Phone: +61 3 6226 7853
Fax: +61 3 6226 2981
Email: jbpedro at utas.edu.au
Contact Address:
Antarctic Climate and Ecosystems CRC
University of Tasmania
Grosvenor St
City: Sandy Bay
Province or State: Tasmania
Postal Code: 7005
Country: Australia


TAS VAN OMMEN
Role: INVESTIGATOR
Phone: +61 3 6226 2981
Email: tas.van.ommen at utas.edu.au
Contact Address:
Antarctic Climate and Ecosystems CRC
University of Tasmania
Grosvenor St
City: Sandy Bay
Province or State: Tasmania
Postal Code: 7005
Country: Australia


JASON ANDERSON
Role: DIF AUTHOR
Email: jason.anderson at utas.edu.au
Contact Address:
Antarctic CRC
University of Tasmania
Grosvenor St
City: Sandy Bay
Province or State: Tasmania
Postal Code: 7005
Country: Australia


Publications/References
Pedro, J. B., Rasmussen, S. O., and van Ommen, T. D. (2012), Tightened constraints on the time-lag between Antarctic temperature and CO2 during the last deglaciation, Clim. Past, 8, 1213-221, doi:doi:10.5194/cp-8-1213-2012, www.clim-past.net/8/1213/2012/

Creation and Review Dates
DIF Creation Date: 2012-12-16
Last DIF Revision Date: 2014-09-11

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