MAUI helped perform and analyze output from numerical simulations of the National Center for Atmospheric Research (NCAR) Whole Atmosphere Community Climate Model (WACCM). Here, MAUI helped us understand the unusual increase in ozone amount during wintertime breakdown of the circumpolar flow (known as the polar vortex). In the above figure, we see a strong enhancement in ozone around the 100-km altitude when the breakdown occurs (at lifecycle day 0). This study was led by an undergraduate student (Olga V. Tweedy) who is now a Ph.D. student at the Johns Hopkins University.
Caption: Composite evolution of the night-time ozone concentration over the wintertime Northern Hemisphere polar region.
Acknowledgements. This study was supported by the National Science Foundation (NSF) under grants AGS-RUI-1116123 and AGS-MRI-0958616 and the South Carolina NASA Space Grant. V. Limpasuvan was also supported by the Kerns Palmetto Professorship through the Provost’s Office.
Tweedy, O. V.. 2012: Polar Ozone Maxima during Vortex Break-Down, 2012 Proceedings to the National Conference on Undergraduate Research, Weber State University, Ogden, Utah
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 WACCM, Journal of Geophysical Research, 118, doi:10.1002/jgrd.50651.