[ncl-talk] matrix X is weighted by the square root of grid cell area

[Dennis Shea]

Applications: * EOF examples*
<http://www.ncl.ucar.edu/Applications/eof.shtml>
There are numerous examples

For examples, see the 1st example: *eof_1_640.ncl*




On Tue, Mar 5, 2019 at 2:45 AM sreerag sudheendran <
ijsreeragsudhi.com at gmail.com> wrote:

> I need to find the EOF from  Extended Reconstructed Sea Surface
> Temperature data set version 3b data. I’m new with NCL, I find the anomaly
> and need to weight the anomaly matrix x by square root of grid cell area.
> Can any one help to get the proper way….
>
> I used
> rad    = 4.*atan(1.)/180.
> clat   = Anom&lat
> clat   = sqrt( cos(rad*clat))
> p=Anom
> p=Anom*conform(Anomx,clat,1)
>
> Where Anom is anomaly…. Is this the correct way to weight anomaly matrix
> by square root of grid cell area.
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