NSF-RUI: Dynamical Coupling during Major Stratospheric Sudden Warming

Characterized by an abrupt break-down of the Northern Hemisphere winter polar vortex, a major stratospheric sudden warming (SSW) can elicit notable and unexpected changes in the mesosphere, as underlined by recent evidence of an elevated stratopause at 80 km. The connection between the stratosphere and mesosphere is potentially tied to gravity waves (GWs) and planetary waves (PWs), dynamical features on the opposite ends of the spatiotemporal spectrum.Using a global chemistry-climate model, a mesoscale model, and observations, this project seeks to illuminate the stratosphere-mesosphere coupling with respect to major SSWs by (1) characterizing the sources/properties of GWs and PWs in the stratosphere and mesosphere, and by (2) assessing their roles and interactions in driving this coupling and the elevated stratopause. A better understanding of the stratosphere-mesosphere coupling during major SSWs can further advance our knowledge of climate evolution, ozone variability, and space physics. 


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 Researchdoi: 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.
De Wit, R. J., R. E. Hibbins, P. J. Espy,Y. J. Orsolini, V. Limpasuvan, and D. Kinnison, 2014: Observations of gravity wave forcing of the mesopause region during the January 2013 major Sudden Stratospheric Warming, Geophysical Research Letters, 41, doi:10.1002/2014GL060501.
Tweedy, O. V., V. Limpasuvan, Y. J. Orsolini, A. K. Smith, R. Garcia, C. Randall, O.-K. Kvissel, D. Kinnison, F. Stordal, V. Harvey, and A.  Chandran, 2013: Nighttime Secondary Ozone Layer during Major Stratospheric Sudden Warmings in Specified-Dynamics WACCMJournal of Geophysical Research, 118, doi:10.1002/jgrd.50651.
Limpasuvan, V., J. H. Richter, Y. J. Orsolini, F. Stordal, and O.-K. Kvissel, 2012: The roles of planetary and gravity waves during a major  stratospheric sudden warming as characterized by WACCM, Journal of Atmospheric and Solar-Terrestrial Physics, 78-79, p. 84-98, doi:10.1016/j.jastp.2011.03.004.
Kvissel, O.-K., Y. J. Orsolini, F. Stordal, V. Limpasuvan, J. H. Richter, and D. R. Marsh, 2012: Mesospheric intrusion and anomalous chemistry  during and after a major stratospheric sudden warming, Journal of Atmospheric and Solar-Terrestrial Physics, 78-79, p. 116-124, doi:10.1016/j.jastp.2011.08.015.