[MITgcm-support] question about cube-sphere halos

[Benny Cheng]

Alistair. Thanks for the info. It's all I need for now. 
It's a long story, but basically, we need the halos to interpolate
uniquely onto each tile.


On Fri, 2004-02-13 at 12:21, Alistair Adcroft wrote:
> I guess we need to know what interpolation is being done on and for - why do
> you have output within the corners and why are interpolating in the halo
> regions when the data is on the next tile?
> 
> A.
> --
> Dr Alistair Adcroft            http://www.mit.edu/~adcroft
> MIT Climate Modeling Initiative        tel: (617) 253-5938
> EAPS 54-1523,  77 Massachusetts Ave,  Cambridge,  MA,  USA
> 
> -----Original Message-----
> From: mitgcm-support-bounces at mitgcm.org
> [mailto:mitgcm-support-bounces at mitgcm.org] On Behalf Of Alistair Adcroft
> Sent: Friday, February 13, 2004 3:13 PM
> To: mitgcm-support at mitgcm.org
> Subject: RE: [MITgcm-support] question about cube-sphere halos
> 
> 
> No - there is no correct values of XC or YC in the corner regions - what
> value should XC(0,0,bi,bj) have? There are two possible different values.
> 
> I didn't know about the CPP flag - I'll see what Chris is trying to do there
> but whatever it is it can't be done on the cube ...
> 
> A.
> --
> Dr Alistair Adcroft            http://www.mit.edu/~adcroft
> MIT Climate Modeling Initiative        tel: (617) 253-5938
> EAPS 54-1523,  77 Massachusetts Ave,  Cambridge,  MA,  USA
> 
> -----Original Message-----
> From: mitgcm-support-bounces at mitgcm.org
> [mailto:mitgcm-support-bounces at mitgcm.org] On Behalf Of Dimitris Menemenlis
> Sent: Friday, February 13, 2004 3:05 PM
> To: mitgcm
> Subject: RE: [MITgcm-support] question about cube-sphere halos
> 
> 
> Alistair, I notice a flag called EXCH_UPDATE_CORNERS in the exch2 routines.
> Benny is only looking to get the values of XC, YC, XG, YG, for interpolation
> purposes (as his informative message clearly stated ;-).  These are not
> ambiguous and setting them to correct values should not affect rest of code
> in any way, right?
> 
> D.