Articles | Volume 5, issue 3
https://doi.org/10.5194/wcd-5-881-2024
https://doi.org/10.5194/wcd-5-881-2024
Research article
 | 
02 Jul 2024
Research article |  | 02 Jul 2024

Deepening mechanisms of cut-off lows in the Southern Hemisphere and the role of jet streams: insights from eddy kinetic energy analysis

Henri Rossi Pinheiro, Kevin Ivan Hodges, and Manoel Alonso Gan

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Cited articles

Bals-Elsholz, T. M., Atallah, E. H., Bosart, L. F., Wasula, T. A., Cempa, M. J., and Lupo, A. R.: The wintertime Southern Hemisphere split jet: Structure, variability, and evolution, J. Climate, 14, 4191–4215, 2001. 
Barnes, M. A., Ndarana T., and Landman, W. A.: Cut-off lows in the Southern Hemisphere and their extension to the surface, Clim. Dynam., 56, 3709–3732, https://doi.org/10.1007/s00382-021-05662-7, 2021. 
Bengtsson, L., Hodges, K. I., and Keenlyside, N.: Will extratopical storms intensify in a warmer climate?, J. Climate, 22, 2276–2301, https://doi.org/10.1175/2008JCLI2678.1, 2009. 
Catto, J. L.: A new method to objectively classify extratropical cyclones for climate studies: Testing in the southwest Pacific region, J. Climate, 31, 4683–4704, https://doi.org/10.1175/JCLI-D-17-0746.1, 2018. 
Cavallo, S. M. and Hakim, G. J.: Composite structure of tropopause polar cyclones, Mon. Weather Rev., 138, 3840–3857, https://doi.org/10.1175/2010MWR3371.1, 2010. 
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Short summary
Cut-off lows (COLs) are weather systems with varied structures and lifecycles, from upper atmospheric to deep vortices. Deep, strong COLs are common around Australia and the southwestern Pacific in autumn and spring, while shallow, weak COLs occur more in summer near the Equator. Jet streams play a crucial role in COL development, with different jets influencing its depth and strength. The study also emphasizes the need for better representation of diabatic processes in reanalysis data.
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