Seasonal variability of CO in the terrestrial mesosphere

Abstract

We measured the J = 1 → 2 rotational transition of terrestrial mesospheric CO both in emission and in absorption against the moon on January 25–26, 1982. A CO mixing profile was obtained from the high signal‐to‐noise ratio emission spectrum. With the inclusion of these most recent spectra and spectra measured by Kunzi and Carlson (1982) we find further evidence suggesting seasonal variation of mesospheric CO as originally reported by Clancy et al. (1982). This seasonal variation may be the consequence of hemispheric circulation in the upper atmosphere.

Stratospheric warming influence on the mesosphere/lower thermosphere as seen by the extended CMAM

“…Measurements of carbon monoxide (CO) have become an important tool for examining large-scale mesospheric circulations (Clancy et al, 1984;de Zafra and Muscari, 2004;Grossman et al, 2006) and the vertical motions in the stratosphere and mesosphere (Allen et al, 1999(Allen et al, , 2000Forkman et al, 2005;Clerbaux et al, 2005). In the stratosphere and mesosphere CO has long been used to infer dynamical processes and diagnose trace gas transport (e.g.…”

Six years of mesospheric CO estimated from ground-based frequency-switched microwave radiometry at 57° N compared with satellite instruments

“…Waters et al (1976) was the pioneer in observing the rotational transition of CO at 115 GHz. Clancy et al (1984) and Bevilacqua et al (1985) made ground-based microwave observations of the seasonal variation of mesospheric CO. Aellig et al (1995) made 115 GHz observations…”

Co‐located ACE‐FTS and Odin/SMR stratospheric‐mesospheric CO 2004 measurements and comparison with a GCM

“…[3] While there have been extensive measurements of tropospheric CO measurements in the last few years [e.g., Deeter et al, 2004], there have been fewer observations of middle atmosphere CO. Mesospheric CO has been measured from the ground by millimeter-wave spectroscopy [e.g., Clancy et al, 1984;Forkman et al, 2003]. The ATMOS FTS on the Space Shuttle measured middle atmosphere CO profiles [Rinsland et al, 2000] using the solar occultation technique.…”