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Allen et al. 2000

Allen, D.R., Stanford, J.L., Nakamura, N., López-Valverde, M.A., López-Puertas, M., Taylor, F.W. and Remedios, J.J. (2000). Antarctic polar descent and planetary wave activity observed in ISAMS CO from April to July 1992. Geophysical Research Letters 27: doi: 10.1029/1999GL010888. issn: 0094-8276.

Antarctic polar descent and planetary wave activity in the upper stratosphere and lower mesosphere are observed in ISAMS CO data from April to July 1992. CO-derived mean April-to-May upper stratosphere descent rates of 15 K/day (0.25 km/day) at 60 ¿S and 20 K/day (0.33 km/day) at 80 ¿S are compared with descent rates from diabatic trajectory analyses. At 60 ¿S there is excellent agreement, while at 80 ¿S the trajectory-derived descent is significantly larger in early April. Zonal wavenumber 1 enhancement of CO is observed on 9 and 28 May, coincident with enhanced wave 1 in UKMO geopotential height. The 9 May event extends from 40 to 70 km and shows westward phase tilt with height, while the 28 May event extends from 40 to 50 km and shows virtually no phase tilt with height. ¿ 2000 American Geophysical Union

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	Abstract

Keywords
Atmospheric Composition and Structure, Middle atmosphere—composition and chemistry, Atmospheric Composition and Structure, Middle atmosphere—constituent transport and chemistry, Meteorology and Atmospheric Dynamics, Mesospheric dynamics, Meteorology and Atmospheric Dynamics, Middle atmosphere dynamics (0341, 0342)

Journal
Geophysical Research Letters
http://www.agu.org/journals/gl/

Publisher
American Geophysical Union
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