Re: area averaging across 0E.

From: Cathy Smith (NOAA Affiliate) <cathy.smith_at_nyahnyahspammersnyahnyah>
Date: Fri Nov 09 2012 - 13:21:28 MST

Dave
I thought of that as a possibility but didn't realize the functionality
existed. Tx!

Cathy

On 11/9/12 12:43 PM, David Brown wrote:
> Hi Cathy,
> You probably want the lonPivot function that lets you choose the longitude to pivot about. The example it gives (pivoting about 330) would work for the use case of -10 to 200.
> -dave
>
>
> On Nov 9, 2012, at 11:58 AM, Cathy Smith (NOAA Affiliate) wrote:
>
>> All
>>
>> I have gridded data that generally goes from 0 to 360 in longitude
>> (sometimes -180 to 180 though I can easily switch that to 0 to 360). I
>> would like to produce area averages from this data.
>> Sometimes, the area to be averaged will cross 0E (350E to 10E, say). I
>> looked and could not find any routine that does this. I thought
>> wgt_areaave_Wrap did but it doesn't seem to (and it doesn't give an error).
>> How can I easily do this? A few ways that occurred to me are to append
>> arrays in longitude (0 to 720) which will create very big arrays as I'm
>> looking at time series. Another alternative is to split up
>> the calculation at 0 but I would need to combine the results back
>> together correctly. I could flip the longitude depending on the desired
>> area but that wouldn't handle -10 to 200, for example though it would
>> handle -10 to 120.
>>
>> I looked through examples and didn't see one though I would think it
>> would be a common task. So, maybe I'm just misunderstanding something.
>>
>> Cathy Smith
>>
>> --
>> ----------------------------------------------
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>> 303-497-6263
>> http://www.esrl.noaa.gov/psd/people/cathy.smith/
>>
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Received on Fri Nov 9 13:21:42 2012

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