[MITgcm-support] how to control obcs balance flow ?

[李志远]

From: LIZHI  <oceanlizy at 163.com>
To: MITgcm Support <mitgcm-support at mitgcm.org>
Subject: Re: [MITgcm-support] how to control obcs balance flow ?Thank you Matt for your quick reply . 
      when I use monthly forcing in the exf , how to use  interpolate with time  , such  as interpolate monthly fields into daily  . It should be defined in the exf_options.h  ?

THANK YOU !


>Subject: Re: [MITgcm-support] how to control obcs balance flow ?
>Message-ID: <34AD18CB-1240-4517-A074-86F84EE61416 at ucsd.edu>
>Content-Type: text/plain; charset="utf-8"
>
>Hello
>
>Yes -- due to intrinsic periodicity and the fact that W is on the west side of the cell for OBCS you should use
>hFacW(2,:,:) on the west wall and hFacS(:,2,:) on the south wall
>
>You can use 
> hFacW(end,:,:) on the east wall and hFacS(:,end,:) on the north wall. 
>
>This allows you to control inflow.
>
>It is safer to make flat bathy in the normal direction for at least the two cells at the boundary. If you use obcs_sponge its better to have flat boundary in the normal direction over the whole sponge so as to not drive a bottom divergence. If you are sponging to a non-zero tangential velocity you should be careful and check how large your W is as the divergence of this velocity will not be balanced by a normal flow divergence.

>It is fine to choose difference forcing periods for different input fields.

>Matt

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