NOAA NCDC National Climatic Data Center
NOAA Paleoclimatology Program, NCDC Paleoclimatology Branch  
Paleoclimatology Navigation Bar Bookmark and Share
NOAA National Environmental Satellite, Data, and Information Service National Oceanic and Atmospheric Administration NOAA National Climatic Data Center U.S. Department of Commerce Paleo Home Data Paleo Projects Paleo Perspectives Education and Outreach About Paleo Program Site Map

Atmospheric methane and nitrous oxide of the late Pleistocene from Antarctic ice cores


Portion of Figure 1. Dome C CH4 (purple line), N2O (red line), and dD (black line).  Click for full image
Portion of Figure 1. Dome C CH4 (purple line), N2O (red line), and dD (black line).
Click for full image.
Atmospheric methane and nitrous oxide of the late Pleistocene from Antarctic ice cores
Science
Vol. 310, Issue 5752, pp. 1317-1321, 25 November 2005.

Renato Spahni1, Jérôme Chappellaz2, Thomas F. Stocker1, Laetitia Loulergue2, Gregor Hausammann1, Kenji Kawamura1, Jacqueline Flückiger1, Jakob Schwander1, Dominique Raynaud2, Valérie Masson-Delmotte3, Jean Jouzel3

1 Climate and Environmental Physics, Physics Institute, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland.
2 Laboratoire de Glaciologie et de Géophysique de l'Environnement (CNRS), 54 Rue Molières, 38402 St. Martin d'Hères Cedex, France.
3 Institut Pierre Simon Laplace/Laboratoire des Sciences du Climat et de l'Environnement, CEA-CNRS 1572, CE Saclay, Orme des Merisiers, 91191 Gif-sur- Yvette, France.

ABSTRACT:
The European Project for Ice Coring in Antarctica Dome C ice core enables us to extend existing records of atmospheric methane (CH4) and nitrous oxide (N2O) back to 650,000 years before the present. A combined record of CH4 measured along the Dome C and the Vostok ice cores demonstrates, within the resolution of our measurements, that preindustrial concentrations over Antarctica have not exceeded 773 +/- 15 ppbv (parts per billion by volume) during the past 650,000 years. Before 420,000 years ago, when interglacials were cooler, maximum CH4 concentrations were only about 600 ppbv, similar to lower Holocene values. In contrast, the N2O record shows maximum concentrations of 278 +/- 7 ppbv, slightly higher than early Holocene values.
Download data from the WDC Paleo archive:
EPICA Dome Concordia Data for the past 650 KYrBP, CH4 or N2O

To read or view the full study, please visit the Science website.
It was published in Science, Vol. 310, Issue 5752, pp. 1317-1321, 25 November 2005.
Dividing Line
Privacy Policy information Open Access Climate Data Policy link USA logo Disclaimer information
Dividing Line
http://www.ncdc.noaa.gov/paleo/pubs/spahni2005/spahni2005.html
Downloaded Wednesday, 26-Nov-2014 10:33:42 EST
Last Updated Wednesday, 20-Aug-2008 11:24:40 EDT by paleo@noaa.gov
Please see the Paleoclimatology Contact Page or the NCDC Contact Page if you have questions or comments.