[Go-essp-tech] CMIP5_Amon pfull/phalf

[Charles Doutriaux]

  Hi Sebastien,

Thanks this confirm my suspicion we'll add a ps2 entry in the table and 
release them today.

Is there any other tables/zfactor, that you know of, that needs this 
type of correction?

Thanks,

C.

On 11/17/10 1:09 AM, Sébastien Denvil wrote:
> Hi Denis,
>
> we have the same error as you have, and I guess everyone with
> alternate_hybrid_sigma will follow the same track.
>
> My understanding of what's going on and a possible workaround is (even
> tough not implemented yet) :
>
> - The difference between time1 and time2 is that time2 is a
> climatological axis : cell_methods: time: mean within years time: mean
> over years
> - But when you describe your vertical axis, the pressure level should
> have the same time axis as plev/phalf
> - So your pressure level should be as well on a climatological axis and
> should be the result of a climatological mean.
> - Not the same pressure level to describe  pfull/phalf and the other
> variables having an alternate_hybrid_sigma vertical.
>
> Create another entry for ps (let's say ps2) but with climatological time
> axis :
>
>       variable_entry:    ps2
>       ...
>       formula:          p(n,k,j,i) = ap(k) + b(k)*ps2(n,j,i)
>       z_factors:        ap: ap b: b ps2: ps2
>       z_bounds_factors: ap: ap_bnds b: b_bnds ps2: ps2
>       dimensions:        longitude latitude time2
>
>
> Generally speaking it could be clearer to have a CMIP5_Aclim as we have
> CMIP5_Oclim table for ocean climatological field.
> FYI the cmor-list is the most appropriate one for this question.
>
> Regards.
> Sébastien
>
> Le 16/11/2010 23:54, Denis Nadeau a écrit :
>> Hi,
>>
>> I am trying to create phalf and pfull variable using
>> "alternate_hybrid_sigma".
>> I am having trouble due to the 2 time axis.
>>
>> 'time2' is needed by "pfull" and "phalf"
>>
>>       variable_entry:    phalf/pfull
>>       ....
>>       dimensions:        longitude latitude alevhalf/alevel time2
>>
>>
>> 'time' is needed by "alternate_hybrid_sigma"
>>
>>       variable_entry:    ps
>>       ...
>>       formula:          p(n,k,j,i) = ap(k) + b(k)*ps(n,j,i)
>>       z_factors:        ap: ap b: b ps: ps
>>       z_bounds_factors: ap: ap_bnds b: b_bnds ps: ps
>>       dimensions:        longitude latitude time
>>
>> I tried to create 2 time axis, one for 'ps' and one for 'phalf' or
>> 'pfull' but I get an NetCDF error.
>>
>>
>> Do you know how to create 'phalf/pfull'?
>> What is the difference between axis 'time' and 'time2'
>>
>>
>>
>> Thanks,
>> Denis
>>
>>
>>
>>
>