using regrid

[Arlindo da Silva]

On Fri, Jun 26, 2009 at 9:12 PM, Charles Seman <Charles.Seman at noaa.gov>wrote:

> Gisele,
>
> I'm not familiar with this dataset... perhaps you could ask some of your
> local colleagues for advice on this issue?
>


Regardless of the "observational resolution" that went into the anaysis,
 the analyzed gridded fields cannot resolve features that are finer than the
~50km size of the gridbox. Therefore, remapping your hi res model to the
analysis grid for validation makes more sense.  For this remapping you could
use the box average method provided by the re() extension:

      http://opengrads.org/doc/udxt/re/

You will need binaries from http://opengrads.org for using the re()
extension. The latest v2.0.a5.oga.5, for example.

    Arlindo



>
> Chuck
>
>
> Gisele Zepka wrote:
>
>> Chuck,
>>
>> My analysis are from NCEP High Resolution Global Forecast System (1
>> degree GFS).
>>
>> Gisele
>>
>>
>>
>> Charles Seman escreveu:
>>
>>> Gisele,
>>>
>>> I don't know... do you know the source of the analysis?
>>>
>>> Chuck
>>>
>>> Gisele Zepka wrote:
>>>
>>>> Sorry, but where can I verify the density of the observations in the
>>>> analysis?
>>>>
>>>> Gisele
>>>>
>>>>
>>>> Charles Seman escreveu:
>>>>
>>>>> Gisele,
>>>>>
>>>>> Could you compare your model output to the analysis by regridding the
>>>>> model output to the analysis grid?  This would smooth out much of the
>>>>> detail in the model, but would preserve the analysis data... a
>>>>> consideration: what is the density of the observations that went into
>>>>> the analysis?  is the density of the obs closer to 1 degree or 8 km?
>>>>>
>>>>> Hope this helps,
>>>>> Chuck
>>>>>
>>>>> Gisele Zepka wrote:
>>>>>
>>>>>> Hi GrADS Users,
>>>>>>
>>>>>> I would like to intepolate some variables from the analysis data of 1
>>>>>> degree resolution to model output resolution (0.072 resolution ~ 8
>>>>>> km)
>>>>>> in order to validate my simulations. First of all, can I do it using
>>>>>> regrid? Is there some resolution limit in regrid function?
>>>>>>
>>>>>> Thanks a lot for any help.
>>>>>>
>>>>>> Gisele
>>>>>>
>>>>>> --
>>>>>> Msc. Gisele dos Santos Zepka
>>>>>> Atmospheric Electricity Group (ELAT)
>>>>>> National Institute for Space Research (INPE)
>>>>>> Av. dos Astronautas, 1758
>>>>>> São José dos Campos/ SP/ Brazil
>>>>>> CEP 12245-970
>>>>>> Phone ++55(12)39456841
>>>>>>
>>>>>
>>>>> --
>>>>>
>>>>> Please note that Charles.Seman at noaa.gov should be considered my NOAA
>>>>> email address, not cjs at gfdl.noaa.gov.
>>>>>
>>>>> ********************************************************************
>>>>> Charles Seman                                Charles.Seman at noaa.gov
>>>>> U.S. Department of Commerce / NOAA / OAR
>>>>> Geophysical Fluid Dynamics Laboratory         voice: (609) 452-6547
>>>>> 201 Forrestal Road                              fax: (609) 987-5063
>>>>> Princeton, NJ  08540-6649            http://www.gfdl.noaa.gov/~cjs/
>>>>> ********************************************************************
>>>>>
>>>>> "The contents of this message are mine personally and do not
>>>>> necessarily
>>>>> reflect any position of the Government or NOAA."
>>>>>
>>>>>
>>>>
>>>> --
>>>> Msc. Gisele dos Santos Zepka
>>>> Atmospheric Electricity Group (ELAT)
>>>> National Institute for Space Research (INPE)
>>>> Av. dos Astronautas, 1758
>>>> São José dos Campos/ SP/ Brazil
>>>> CEP 12245-970
>>>> Phone ++55(12)39456841
>>>>
>>>
>>> --
>>>
>>> Please note that Charles.Seman at noaa.gov should be considered my NOAA
>>> email address, not cjs at gfdl.noaa.gov.
>>>
>>> ********************************************************************
>>> Charles Seman                                Charles.Seman at noaa.gov
>>> U.S. Department of Commerce / NOAA / OAR
>>> Geophysical Fluid Dynamics Laboratory         voice: (609) 452-6547
>>> 201 Forrestal Road                              fax: (609) 987-5063
>>> Princeton, NJ  08540-6649            http://www.gfdl.noaa.gov/~cjs/
>>> ********************************************************************
>>>
>>> "The contents of this message are mine personally and do not necessarily
>>> reflect any position of the Government or NOAA."
>>>
>>>
>>
>> --
>> Msc. Gisele dos Santos Zepka
>> Atmospheric Electricity Group (ELAT)
>> National Institute for Space Research (INPE)
>> Av. dos Astronautas, 1758
>> São José dos Campos/ SP/ Brazil
>> CEP 12245-970
>> Phone ++55(12)39456841
>>
>
> --
>
> Please note that Charles.Seman at noaa.gov should be considered my NOAA
> email address, not cjs at gfdl.noaa.gov.
>
> ********************************************************************
> Charles Seman                                Charles.Seman at noaa.gov
> U.S. Department of Commerce / NOAA / OAR
> Geophysical Fluid Dynamics Laboratory         voice: (609) 452-6547
> 201 Forrestal Road                              fax: (609) 987-5063
> Princeton, NJ  08540-6649            http://www.gfdl.noaa.gov/~cjs/
> ********************************************************************
>
> "The contents of this message are mine personally and do not necessarily
> reflect any position of the Government or NOAA."
>



-- 
Arlindo da Silva
dasilva at alum.mit.edu
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