Articles | Volume 15, issue 1
https://doi.org/10.5194/acp-15-297-2015
https://doi.org/10.5194/acp-15-297-2015
Research article
 | 
13 Jan 2015
Research article |  | 13 Jan 2015

A global non-hydrostatic model study of a downward coupling through the tropical tropopause layer during a stratospheric sudden warming

N. Eguchi, K. Kodera, and T. Nasuno

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Cited articles

Abalos, M., W.J. Randel and E. Serrano : Dynamical forcing of sub-seasonal variability in the tropical Brewer-Dobson circulation, J. Atmos. Sci., in press.
Andrews, D. G., Holton, J. R., and Leovy, C. B.: Middle Atmosphere Dynamics, Academic Press, Orlando, Florida, 489 pp., 1987.
Dörnbrack, A., Pitts, M. C., Poole, L. R., Orsolini, Y. J., Nishii, K., and Nakamura, H.: The 2009–2010 Arctic stratospheric winter – general evolution, mountain waves and predictability of an operational weather forecast model, Atmos. Chem. Phys., 12, 3659–3675, https://doi.org/10.5194/acp-12-3659-2012, 2012.
Eguchi, N. and Kodera, K.: Impact of the 2002, Southern Hemisphere, stratospheric warming on the tropical cirrus clouds and convective activity, Geophys. Res. Lett., 34, L05819, https://doi.org/10.1029/2006GL028744, 2007.
Eguchi, N. and Kodera, K.: Impacts of stratospheric sudden warming event on tropical clouds and moisture fields in the TTL: a case study, SOLA, 6, 137–140, https://doi.org/10.2151/sola.2010-035, 2010.
Short summary
The dynamical coupling process between stratosphere and troposphere in the tropical tropopause layer (TTL) during stratospheric sudden warming (SSW) was investigated using simulation data of global non-hydrostatic model (NICAM) that does not use cumulus parameterization. The results suggested that increased stratospheric tropical upwelling associated with SSW induced decreased static stability in TTL, which contributes to increased convective activity and changes in its large-scale organizations
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