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Observing the Vertical Branch of the Mesospheric Circulation at lat N 60° Using Ground Based Measurements of CO and H2O

Peter Forkman (Institutionen för radio- och rymdvetenskap, Global miljömätteknik) ; Patrick Eriksson (Institutionen för radio- och rymdvetenskap, Global miljömätteknik) ; Donal P. Murtagh (Institutionen för radio- och rymdvetenskap, Global miljömätteknik)
Journal of Geophysical Research - Atmospheres (0148-0227). Vol. 110 (2005), D5,
[Artikel, refereegranskad vetenskaplig]

In this report daily ground-based measurements of vertical profiles of CO and H2O from 2002 are used to trace the vertical movement of air caused by the seasonally varying mean meridional circulation. In the spring (days 100-130) the estimated ascending velocity is found to vary with time and altitude from about between 250 m/day at 65 km altitude on day 100 to a maximum of similar to 450 m/day at 85-90 km altitude on day 130. In the late summer and fall the descending velocity goes from 0 (when the downwelling starts) to similar to 250 m/day at 75 km day 280. The mesospheric adiabatic temperature changes caused by the vertical movement of air are compared to mesopause temperature as estimated by the radiance of the Meinel band OH airglow.



Denna post skapades 2006-11-13. Senast ändrad 2014-10-27.
CPL Pubid: 4024

 

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Institutioner (Chalmers)

Institutionen för radio- och rymdvetenskap, Global miljömätteknik (2005-2008)

Ämnesområden

Fysik

Chalmers infrastruktur