Sudden Stratospheric Warming

Dynamical Coupling during Major Sudden Stratospheric Warming (SSW)

The CI HPC clusters were used to run simulations using the National Center for Atmospheric Research (NCAR) Whole Atmosphere Community Climate Model (WACCM). The analyzed results illustrate the interplay between impact of mesoscale atmospheric gravity waves and planetary-scale Rossby waves during the wintertime phenomenon known as the Major Sudden Stratospheric Warming (SSW), when the temperature in the polar stratospheric regions increases nearly 50 degrees Kelvin in several days. While SSW phenomenon can impact on our wintertime surface climate, the emergence of planetary-scale waves in the mesosphere and above can disturb the ionosphere (affecting global communications) and the downward transport of long-lived chemical tracers in to the stratosphere where they can impact the ozone layer.

Acknowledgements This study is supported in part by the National Science Foundation (NSF) Climate and Large-Scale Dynamics program under award AGS-1642232, the NSF Research Experiences for Undergraduates  program under award AGS 1560210, and the NSF Major Research Instrumentation program under award AGS 162406.

Recent Publications:

Smith-Johnsen, C, Y. J. Orsolini, F. Stordal, V. Limpasuvan, and K. Pérot, 2018: Nighttime Mesospheric Ozone During the 2002 Southern Hemispheric Major Stratospheric WarmingJournal of Atmospheric and Solar-Terrestrial Physics, doi:10.1016/j.jastp.2017.12.018.

Orsolini, Y. J., V. Limpasuvan, K. Pérot, P. J. Espy, R. Hibbins, S. Lossow, K. R. Larsson, D. Murtagh, 2017: Modelling the descent of NO during the Elevated Stratopause Event of January 2013Journal of Atmospheric and Solar-Terrestrial Physics, 155, 50-61.

Limpasuvan, V., Y. J. Orsolini, A. Chandran, R. R. Garcia, A. K. Smith, 2016: On the Composite Response of the MLT to Major Sudden Stratospheric Warming Events with Elevated Stratopause, Journal of Geophysical Research, doi:10.1002/2015JD024401.

Stray, N. H., Y. J. Orsolini, P. J. Espy, V. Limpasuvan, and R. E. Hibbins, 2015: Observations of Planetary Waves in the Mesosphere-Lower Thermosphere during Stratospheric Warming events, Atmospheric Chemistry and Physics, 15, 4997-5005, doi:10.5194/acpd-15-4997-2015.