For the Baltimore meeting there were two special sessions, «Acoustics in Polar Environments», which was organized and chaired by Jennifer Miksis - Olds and Ann Bowles and «Impact of Shallow
Water Acoustic
Propagation by Linear Internal
Waves and Neutrally Buoyant Intrusions», organized and chaired by DJ Tang and David Bradley.
David Springer wrote: «Roy Spencer, one of the world's foremost experts on electromagnetic
wave propagation through earth's atmosphere, does a good job of describing the hypothetical conditions which would evolve if we had a pure N2 atmosphere including no
water vapor.»
Features of the model described here include the following: (1) tripolar grid to resolve the Arctic Ocean without polar filtering, (2) partial bottom step representation of topography to better represent topographically influenced advective and
wave processes, (3) more accurate equation of state, (4) three - dimensional flux limited tracer advection to reduce overshoots and undershoots, (5) incorporation of regional climatological variability in shortwave penetration, (6) neutral physics parameterization for representation of the pathways of tracer transport, (7) staggered time stepping for tracer conservation and numerical efficiency, (8) anisotropic horizontal viscosities for representation of equatorial currents, (9) parameterization of exchange with marginal seas, (10) incorporation of a free surface that accommodates a dynamic ice model and
wave propagation, (11) transport of
water across the ocean free surface to eliminate unphysical «virtual tracer flux» methods, (12) parameterization of tidal mixing on continental shelves.