[MITgcm-support] diagnostics pkg

[Dimitris Menemenlis]

Somehow my previous message to list does not seem to have been received:

> Martin, I regularly use the following and it does not seem to cause any problem:
> 
>   frequency(11) = 21600.,
>    fields(1,11) = 'THETA   ',
>    levels(1,11) = 1.,
>    filename(11) = 'SST',
>   frequency(31) = 2635200.,
>    fields(1,31) = 'THETA   ',
>    filename(31) = 'THETA',
>    fileflags(31)= 'D       ',

But if I remember correctly, the SST diagnostic required a full 3D array of 
storage to be set aside?  D.