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Weather and Climate Dynamics An interactive open-access journal of the European Geosciences Union
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WCD | Articles | Volume 1, issue 2
Weather Clim. Dynam., 1, 389–404, 2020
https://doi.org/10.5194/wcd-1-389-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Weather Clim. Dynam., 1, 389–404, 2020
https://doi.org/10.5194/wcd-1-389-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 14 Aug 2020

Research article | 14 Aug 2020

Abrupt transitions in an atmospheric single-column model with weak temperature gradient approximation

Benjamin A. Stephens and Charles S. Jackson

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Cited articles

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Brook, E. J., Sowers, T., and Orchado, J.: Rapid variations in atmospheric methane concentration during the past 110,000 years, Science, 273, 1087–1091, 1996. a
Brook, E. J., Harder, S., Severinghaus, J., Steig, E., and Sucher, C. M.: On the origin and timing of rapid changes in atmospheric methane during the last glacial period, Global Biogeochem. Cy., 14, 559–572, 2000. a
Charney, J. G.: A note on large-scale motions in the tropics, J. Atmos. Sci., 20, 607–609, 1963. a
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We analyze abrupt transitions between tropical rainfall regimes in a single-column model (SCM) of the tropical atmosphere. Multiple equilibria have been observed before in SCMs, but here we analyze actual bifurcations. We attribute the transitions to a sudden loss of evaporative cooling in the lower column due to nonlinearities in microphysics. This study may have implications for atmospheric dynamics more broadly but also for understanding abrupt transitions in paleoclimate.
We analyze abrupt transitions between tropical rainfall regimes in a single-column model (SCM)...
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