[MITgcm-support] Re: problem higher order advections schemes

[Jean-Michel Campin]

Hi Martin,

Didn't do any other test, but thinking to what causes
this strange and very different behavior of 
those advection schemes (77 30 & 33), it could simply due to the 
fact that they are not using the Adams-Bashforth 
making the internal wave mode completely explicit (and
therefore unstable), unless you turn on the stagger timestep option.
Might be as simple as that.

So, Alistair and me strongly recommand to use the stagger timestep 
option with any of those advection scheme.

See you,

Jean-Michel