Material:
A.J. Krueger and R.A. Minzner. A mid-latitude ozone model for the 1976 us standard atmosphere.
Journal of Geophysical Research, 81(24):4477–4481, 1976.

M.R. Schoeberl. Stratospheric Warmings: Observationsand Theory.
Reviews of Geophysics and Space Science, 16(4):521-538, 1978.


E.R. Nash,  P.A. Newman, J.E. Rosenfield,  and M.R. Schoeberl. An objective determination of the polar vortex using Ertel's potential vorticity.
Journal of Geophysical Research, 101(D5):9471-9478, 1996

O. Buhler. Waves and Mean Flows.
Cambridge University Press, Cambridge, 2009

G.L. Manney and J.L. Sabutis. Development of the polar vortex in the 2009-2000 Arctic winter stratosphere.
Geophysical Research Letters, 27(17):2589-2592, 2000

B. Thurairajah, R.L. Collins, V.L. Harvey, R.S. Lieberman, M. Gerding, K. Mizutani, J.M. Livingston. Gravity wave activity in the Arctic stratosphere and
mesosphere during the 2007–2008 and 2008–2009 stratospheric sudden warming events.
Journal of Geophysical Research, 29(D00N06):1-17, 2011

Images:
[1] Nicolle Rager Fuller, National Science Foundation
http://www.nsf.gov/news/news_images.jsp?cntn_id=109820&org=NSF

[2] http://www.awi.de/en/news/press_releases/detail/item/ozon_pm_englisch_einsetzen/?cHash=bedb7cf7790e3e892ab6549b1249f2ef

[3] http://essayweb.net/geology/quicknotes/coriolis.shtml

[4] http://www.studyblue.com/notes/note/n/exam-1-chapters-1-4/deck/6052632

[5] http://www.worldatlas.com/webimage/countrys/polar/arctic.htm

[6] http://www.bodyenlightenment.me/blog/2007/11/raw-divas-in-action/

[7] http://www.physics.uwo.ca/~whocking/p103/grav_wav.html

[8] http://science1.nasa.gov/science-news/science-at-nasa/2008/19mar_grits/