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ACP | Articles | Volume 20, issue 9
Atmos. Chem. Phys., 20, 5477–5486, 2020
https://doi.org/10.5194/acp-20-5477-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Atmos. Chem. Phys., 20, 5477–5486, 2020
https://doi.org/10.5194/acp-20-5477-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 12 May 2020

Research article | 12 May 2020

Observational evidence of moistening the lowermost stratosphere via isentropic mixing across the subtropical jet

Jeffery Langille et al.

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Cited articles

Añel, J. A., Antuña, J. C., De La Torre, L., Castanheira, J. M., and Gimeno, L.: Climatological features of global multiple tropopause events, J. Geophys. Res.-Atmos., 113, D7, https://doi.org/10.1029/2007JD009697, 2008. 
Banerjee, A., Chiodo, G., Previdi, M., Ponater, M., Conley, A. J., and Polvani, L. M.: Stratospheric water vapour: an important climate feedback, Clim. Dynam., 53, 1697–1710, https://doi.org/10.1007/s00382-019-04721-4, 2019. 
Chen, P.: Isentropic cross-tropopause mass exchange in the extratropics, J. Geophys. Res., 100, 16661–16673, https://doi.org/10.1029/95jd01264, 1995. 
de Forster, P. M. F. and Shine, K. P.: Stratospheric water vapour changes as a possible contributor to observed stratospheric cooling, Geophys. Res. Lett., 26, 3309–3312, https://doi.org/10.1029/1999GL010487, 1999. 
de Forster, P. M. F. and Shine, K. P.: Assessing the climate impact of trends in stratospheric water vapour, Geophys. Res. Lett., 29, 10-1–10-4, https://doi.org/10.1029/2001gl013909, 2002. 
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Short summary
Water vapour (WV) is a highly variable and extremely important trace gas in Earth’s atmosphere. Due to its radiative and chemical properties, it is coupled to the climate in an extremely complex manner. This is especially true in the lowermost stratosphere (LMS). Despite its importance, the physical processes that control mixing and the distribution of WV in the LMS are poorly understood. This study provides observational evidence of moistening the LMS via mixing across the subtropical jet.
Water vapour (WV) is a highly variable and extremely important trace gas in Earth’s...
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