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Science 24 November 2006:
Vol. 314. no. 5803, pp. 1253 - 1254
DOI: 10.1126/science.1135134
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Perspectives

ATMOSPHERE:
Global Change in the Upper Atmosphere

J. Laštovička,1 R. A. Akmaev,2 G. Beig,3 J. Bremer,4 J. T. Emmert,5

The upper atmosphere is cooling and contracting as a result of rising greenhouse gas concentrations. These changes are likely to affect the orbital lifetimes of satellites.

1J. Laštovička is at the Institute of Atmospheric Physics, 14131 Prague, Czech Republic. E-mail: jla{at}ufa.cas.cz

2R. A. Akmaev is at CIRES, University of Colorado, Boulder, CO 80309, USA.

3G. Beig is at the Indian Institute of Tropical Meteorology, Pune-411 008, India.

4J. Bremer is at the Leibnitz-Institute of Atmospheric Physics, 18225 Kühlungsborn, Germany.

5J. T. Emmert is at the Naval Research Laboratory, Washington, DC 20375, USA.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)