Prof. John Marshall to speak in the EAPS-PAOC Sack Lunch Seminar. Abstract: In this talk I will use inferences from text-book dynamics (the theory of linear Rossby waves, baroclinic instability and geostrophic turbulence) to discuss two topics inspired by satellite observations, and the connection between them:
(i) The interpretation of the propagation of surface altimetric observations in terms of linear planetary waves and geostrophic turbulence
(ii) The geography of eddy stirring and mixing in the southern ocean: altimetric evidence for enhanced mixing at critical levels.