Re: [EXTERNAL] [ferret_users] minimum range for @DIN ?

[Xiaoyu Bai <xbai1@xxxxxxxx>]

Dear Ryo san,

ave(q) = din(q) / A,

where A is the area of the integration and average.  Therefore

din(q - ave(q)) = din(q) - A ave(q) = din(q) - din(q) = 0.

This makes sense to me. 

integral on I and J instead of x and y as in "x=0:360@DIN, y=90S:90N@DIN"

It does brought down the value a little bit:

list test_din
             VARIABLE : COMP3[X=0:360@DIN,Y=90S:90N@DIN]
             FILENAME : coads_climatology.cdf
             FILEPATH : /home/xbai1/miniconda2/envs/FERRET/share/fer_dsets/data/
             LONGITUDE: 0E to 0E(360)
             LATITUDE : 90S to 90N
             TIME     : 16-AUG 07:23
         -90.20

I will definitely pay more attention to the difference between IJ and XY in the future.

Thank you very much and stay healthy,

Xiaoyu 

On Fri, Jul 23, 2021 at 2:35 PM Ryo Furue <furue@xxxxxxxxxx> wrote:

list comp1[I=@SUM,J=@SUM], comp2[I=@SUM,J=@SUM]
             DATA SET: /home/xbai1/miniconda2/envs/FERRET/share/fer_dsets/data/coads_climatology.cdf
             LONGITUDE: 20E to 20E(380) (XY summed)
             LATITUDE: 90S to 90N (XY summed)
             TIME: 16-AUG 07:23
 Column  1: COMP1 is TEST-MEAN
 Column  2: COMP2 is TEST-21.16
           COMP1   COMP2
I / *:    -17139. -17147.

I am puzzled by this issue.

Thank you very much and stay healthy,

Xiaoyu

 

  

On Tue, Jul 20, 2021 at 11:06 PM Ryo Furue <furue@xxxxxxxxxx&

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Xiaoyu

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Xiaoyu

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Xiaoyu