Dear Bert and Rich,
thanks for this information ... I thought of the tsunami possibility,
but had blinders on when it came to coastal modeling.
I vote for generalizing the coordinate to include time dependent depth.
cheers,
Karl
Bert Jagers wrote:
> Dear Karl,
>
> In addition to the reply already given by Rich, I should probably add
> that the term "ocean" be somewhat confusing in this respect. The studies
> focus in general on the development on the coastal shelf, such as beach
> profiles, estuaries and even rivers. In all cases the "ocean" sigma
> coordinate is appropriate for the type of vertical grid that we use
> except for the fact that it is not really ocean --- but that is the
> price we have to pay for standard names --- and that the bed level (in
> CF referred to as depth) changes.
>
> To come up with a real ocean application outside my regular field of
> work, one might be interested in doing some kind of tsunami modelling in
> which the tsunami is triggered by ocean bottom changes (possible
> horizontal shift may make things more complicated).
>
> Best regards,
>
> Bert
> ----- Original Message ----- From: "Karl Taylor" <taylor13 at llnl.gov>
> To: "Bert Jagers" <Bert.Jagers at wldelft.nl>
> Cc: <cf-metadata at cgd.ucar.edu>
> Sent: Tuesday, October 03, 2006 6:44 PM
> Subject: Re: [CF-metadata] question about sigma level vertical coordinate.
>
>
>> Dear Bert,
>>
>> I am curious as to what sort of modeling you are doing. What is
>> changing the depth of the ocean, and over what time-scale? Are you
>> planning an actual simulation where you will do this?
>>
>> Again, I'm just curious about this, since I am unaware of any modeling
>> requiring a time-dependent ocean depth. Like Jonathan, I think that
>> if there is a need for it, we should extend CF to include this.
>>
>> Best regards,
>> Karl
>>
>>
>> Bert Jagers wrote:
>>>> I should think so, if the CF document were amended accordingly. In
>>>> other
>>>> such cases we have not introduce new coord systems.
>>>
>>> Thank you for the answer. I would really appreciate if the CF
>>> document were extended to include this extension of the ocean sigma
>>> coordinate definition.
>>>
>>> Best regards,
>>>
>>> Bert
>>>
>>>
>>> _______________________________________________
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>>> CF-metadata at cgd.ucar.edu
>>> http://www.cgd.ucar.edu/mailman/listinfo/cf-metadata
>>>
>>
>
>
Received on Wed Oct 04 2006 - 09:39:00 BST
