Variations in Atmospheric N 2 O Concentration During Abrupt Climatic Changes

Author:

Flückiger J.1,Dällenbach A.1,Blunier T.1,Stauffer B.1,Stocker T. F.1,Raynaud D.2,Barnola J.-M.2

Affiliation:

1. Climate and Environmental Physics, Physics Institute, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland.

2. CNRS Laboratoire de Glaciologie et Géophysique de l'Environnement (LGGE), Boîte Postale 96, 38402 St Martin d'Hères Cedex, Grenoble, France.

Abstract

Nitrous oxide (N 2 O) is an important greenhouse gas that is presently increasing at a rate of 0.25 percent per year. Records measured along two ice cores from Summit in Central Greenland provide information about variations in atmospheric N 2 O concentration in the past. The record covering the past millennium reduces the uncertainty regarding the preindustrial concentration. Records covering the last glacial-interglacial transition and a fast climatic change during the last ice age show that the N 2 O concentration changed in parallel with fast temperature variations in the Northern Hemisphere. This provides important information about the response of the environment to global climatic changes.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference34 articles.

1. M. Prather et al. in Climate Change 1994 J. T. Houghton et al. Eds. (Cambridge Univ. Press New York 1995) pp. 73–126.

2. This data is from the National Oceanic and Atmospheric Administration/Climate Monitoring and Diagnostics Laboratory air sampling network (available at www.cmdl.noaa.gov/ftpdata.html).

3. Etheridge D. M., Pearman G. I., de Silva F., Ann. Glaciol. 10, 28 (1988).

4. M. A. K. Khalil and R. A. Rasmussen ibid. p. 73.

5. Zardini D., et al., J. Atmos. Chem. 8, 189 (1989).

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