Articles | Volume 23, issue 2
https://doi.org/10.5194/acp-23-1705-2023
https://doi.org/10.5194/acp-23-1705-2023
Research article
 | 
31 Jan 2023
Research article |  | 31 Jan 2023

Aura/MLS observes and SD-WACCM-X simulates the seasonality, quasi-biennial oscillation and El Niño–Southern Oscillation of the migrating diurnal tide driving upper mesospheric CO primarily through vertical advection

Cornelius Csar Jude H. Salinas, Dong L. Wu, Jae N. Lee, Loren C. Chang, Liying Qian, and Hanli Liu

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Cited articles

Akmaev, R. A. and Shved, G. M.: Modelling of the composition of the lower thermosphere taking account of the dynamics with applications to tidal variations of the [OI] 5577 Å airglow, J. Atmos. Terr. Phys., 42, 705–716, 1980. 
Allen, D. R., Stanford, J. L., López-Valverde, M. A., Nakamura, N., Lary, D. J., Douglass, A. R., Cerniglia, M. C., Remedios, J. J., and Taylor, F. W.: Observations of middle atmosphere CO from the UARS ISAMS during the early northern winter 1991/92, J. Atmos. Sci., 56, 563–583, 1999. 
Allen, D. R., Stanford, J. L., Nakamura, N., Lopez-Valverde, M. A., Lopez-Puertas, M., Taylor, F. W., and Remedios, J.J.: Antarctic polar descent and planetary wave activity observed in ISAMS CO from April to July 1992, Geophys. Res. Lett., 27, 665–668, 2000. 
Angelats i Coll, M. and Forbes, J. M.: Dynamical influences on atomic oxygen and 5577 Å emission rates in the lower thermosphere, Geophys. Res. Lett., 25, 461–464, 1998. 
Brasseur, G. P. and Solomon, S.: Aeronomy of the middle atmosphere: Chemistry and physics of the stratosphere and mesosphere, vol. 32, Springer Science & Business Media, https://doi.org/10.1007/1-4020-3824-0_3, 2006. 
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Short summary
Upper mesospheric carbon monoxide's (CO) photochemical lifetime is longer than dynamical timescales. This work uses satellite observations and model simulations to establish that the migrating diurnal tide and its seasonal and interannual variabilities drive CO primarily through vertical advection. Vertical advection is a transport process that is currently difficult to observe. This work thus shows that we can use CO as a tracer for vertical advection across seasonal and interannual timescales.
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