[MITgcm-support] filters for vertical velocity in cubed-sphere grid

[Yuan Lian]

Hi,

I noticed Shapiro filter is not applied to vertical velocity 
(atmospheric model, maybe generally for oceanic model as well).
Ideally, the vertical velocity should be calculated from continuity 
equation. However, corner effect on vertical velocity are
noticeable, ie, stronger upward or downward motions comparing to 
elsewhere. In a neutrally stable atmosphere, air at corners
will experience adiabatic heating or cooling and cause local maximum (or 
minimum) of temperature.

Also, it there any way to generate high resolution cubed-sphere grid 
while maintaining the ratio of grid areas?

Thanks!

Yuan