Entry_ID: NSIDC-0202
Entry_Title: Atmospheric CO2 Trapped in the Ice Core from Siple Dome, Antarctica
Group: Data_Set_Citation
   Dataset_Creator: Wahlen, Martin
   Dataset_Title: Atmospheric CO2 Trapped in the Ice Core from Siple Dome, Antarctica
   Dataset_Release_Date: 2003-12-11
   Dataset_Release_Place: Boulder, Colorado USA
   Dataset_Publisher: NSIDC: National Snow and Ice Data Center
   Online_Resource: http://nsidc.org/data/nsidc-0202.html
   Dataset DOI: http://dx.doi.org/10.7265/N5N877Q9
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Jinho
   Last_Name: Ahn
   Email: jinhoahn@snu.ac.kr
   Phone: 1 541 737-1377 x
   Group: Contact_Address
      Address: Seoul National University
      Address: School of Earth and Environmental Sciences
      Address: 599 Kwanak-ro
      Address: Kwanak-gu
      Address: School of Earth and Environmental Sciences
      Address: Seoul National University
      Address: Seoul 151742, South Korea
      Country: Korea
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Martin
   Last_Name: Wahlen
   Email: mwahlen@ucsd.edu
   Phone: 1 858 534-0828 
   Fax: 1 858  534-0967 
   Group: Contact_Address
      Address: University of California San Diego
      Address: Scripps Institution of Oceanography
      Address: Scripps Institution of Oceanography
      Address: University of California San Diego
      City: La Jolla
      Province_or_State: CA
      Postal_Code: 92093
      Country: USA
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Bruce
   Last_Name: Deck
   Group: Contact_Address
      Address: University of California San Diego
      Address: Scripps Institution of Oceanography
      Address: Scripps Institution of Oceanography
      Address: University of California San Diego
      City: La Jolla
      Province_or_State: CA
      Country: USA
   End_Group
End_Group
Group: Personnel
   Role: Technical Contact
   First_Name: NSIDC
   Last_Name: User Services
   Email: nsidc@nsidc.org
   Phone: 1 303 492-6199 x
   Fax: 1 303  492-2468 x
   Group: Contact_Address
      Address: National Snow and Ice Data Center
      Address: CIRES, 449 UCB
      Address: University of Colorado
      City: Boulder
      Province_or_State: CO
      Postal_Code: 80309-0449
      Country: USA
   End_Group
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Snow/Ice
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Snow/Ice
   Variable_Level_1: Snow/Ice Chemistry
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Paleoclimate
   Term: Ice Core Records
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Paleoclimate
   Term: Ice Core Records
   Variable_Level_1: Carbon Dioxide
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Terrestrial Hydrosphere
   Term: Snow/Ice
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Terrestrial Hydrosphere
   Term: Snow/Ice
   Variable_Level_1: Snow/Ice Chemistry
End_Group
Keyword: Carbon Dioxide
Keyword: Ice Core
Keyword: Siple Dome
Sensor_Name: CORING DEVICES
Source_Name: GROUND STATIONS
Group: Temporal_Coverage
   Start_Date: 2001-01-01
   Stop_Date: 2003-03-01
End_Group
Data_Set_Progress: in work
Group: Spatial_Coverage
   Southernmost_Latitude: -81.66
   Northernmost_Latitude: -81.66
   Westernmost_Longitude: -148.82
   Easternmost_Longitude: -148.82
End_Group
Group: Location
   Location_Category: CONTINENT
   Location_Type: ANTARCTICA
End_Group
Group: Use_Constraints

   The data before 40,000 yr BP can be used only with permission by the authors 
   (Jinho Ahn, Martin Wahlen,and Bruce Deck )

End_Group
Data_Set_Language: English
Originating_Center: AGDC
Group: Data_Center
   Data_Center_Name: NSIDC > National Snow and Ice Data Center
   Data_Center_URL: http://nsidc.org
   Group: Personnel
      Role: Data Center Contact
      First_Name: NSIDC
      Last_Name: User Services
      Email: nsidc@nsidc.org
      Phone: 1 303 492-6199 
      Fax: 1 303  492-2468 
      Group: Contact_Address
         Address: National Snow and Ice Data Center
         Address: CIRES, 449 UCB
         Address: University of Colorado
         City: Boulder
         Province_or_State: CO
         Postal_Code: 80309-0449
         Country: USA
      End_Group
   End_Group
End_Group
Group: Data_Center
   Data_Center_Name: AGDC > Antarctic Glaciological Data Center
   Data_Center_URL: http://nsidc.org/agdc/
   Group: Personnel
      Role: Data Center Contact
      First_Name: AGDC
      Last_Name: User Services
      Email: nsidc@nsidc.org
      Phone: 1 303 492-6199 x
      Fax: 1 303  492-2468 x
      Group: Contact_Address
         Address: National Snow and Ice Data Center
         Address: CIRES, 449 UCB
         Address: University of Colorado
         City: Boulder
         Province_or_State: CO
         Postal_Code: 80309-0449
         Country: USA
      End_Group
   End_Group
End_Group
Group: Distribution
   Distribution_Media: FTP
   Distribution_Size: 3 KB
   Distribution_Format: ASCII Text (.txt)
End_Group
Group: Reference

   Wahlen, M., D. Allen, B. Deck, and A. Herchenroder, Initial measurement of CO2 
   concentrations (1530 to 1940 AD) in air occluded in the GISP2 ice core from 
   central Greenland, Geophysical Research Letters, 18, 1457-1460, 1991.

   Smith, H.J., M. Wahlen, D. Mastroianni, and K. Taylor, The CO2 concentration 
   of air trapped in GISP2 ice from the Last Glacial Maximum-Holocene transition, 
   Geophysical Research Letters, 24, 1-4, 1997.  

   Smith, H.J., M. Wahlen, D. Mastroianni, K. Taylor, and P. Mayewski, The CO2 
   concentration of air trapped in Greenland Ice Sheet Project 2 ice formed 
   during periods of rapid climate change, Journal of Geophysical Research, 102, 
   26577-26582, 1997.

   Ahn, J., M. Wahlen, B.L. Deck, E.J. Brook, P.A. Mayewski, K.C. Taylor, J.W.C. 
   White. 2004. A record of atmospheric CO2 during the last 40,000 years from the 
   Siple Dome, Antarctica ice core. Journal of Geophysical Research - 
   Atmospheres, accepted. (The data older than 40 kyrBP can only be used with 
   permission by the authors.)

   Taylor, K.C., J.W.C. White, J.P. Severinghaus, E.J. Brook, P.A. Mayewski, 
   R.B.Alley, E.J.Steig, M.K.Spencer, E.Meyerson, D.A.Meese, G.W.Lamorey, 
   A.Grachev, A.J.Gow and B.A.Barnett, Abrupt late glacial climate change in the 
   Pacific sector of Antarctica, Quaternary Science Review, in press, 2003.

   Taylor,K.C., R.B.Alley, D.A.Meese, M.Spencer, E.Brook, N.Dunbar, B.Finkle, 
   T.J.Gow, A.Kurbatov, P.A.Mayewski, E. Meyerson, K.Nishiizumi, and 
   G.A.Zielinski. Dating the Siple Dome, Antarctic ice core by manual and 
   computer interpretation of annual layering. Journal of Geophysical Research. 
   In preparation. 2003.

   Gas age scale for the 97.6 to 40,000 yr BP from Ed Brook and Michael Bender 
   (personal communication).

End_Group
Group: Summary

   These data are CO2 concentration of the air occulded in Siple Dome ice core, 
   Antarctica. The study was conducted between January 2001 and March 2003 on a 
   deep ice core from Siple Dome Core A, located at 81.66 S, 148.82 W. The data 
   covers up to the Termination II (around 140,000 years ago). The parameters are 
   depth in meters and carbon dioxide (CO2) concentration in part per million 
   (ppm). The deepest depth (>995 m) show CO2 values of more than 390 ppm, 
   suggesting reaction and mixing near the bottom with a till ice layer (>1001.8 
   m), and the intrusions of different ice flows that were laterally located near 
   bed rock. Although deep CO2 values cannot be dated in any way, two of the 
   deepest CO2 results (~ 200 ppm) indicate ages of early Termination II or the 
   penultimate glacial period.

   For each data point, four to six samples from the same depth interval were 
   dry-extracted mechanically. Each sample has a volume of 4~6 cm3. CO2 
   concentration was measured with IR tunable diode laser spectroscopy, scanning 
   a single vibrational-rotational absorption line.

End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW PROJECT HOME PAGE
   End_Group
   URL: http://nsidc.org/data/waiscores/data.html
   Description: WAISCORES Home Page
End_Group
Metadata_Name: CEOS IDN DIF
Metadata_Version: 9.7
DIF_Creation_Date: 2003-12-11
Last_DIF_Revision_Date: 2014-03-14
DIF_Revision_History: Removed USADCC logo for Search cleanup.