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Re: EOF Arctic Oscillation for beginner [message #90538 is a reply to message #90537]

Fri, 06 March 2015 14:58

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

siumtesfai@gmail.com writes:

> I have used geopotential height at 1000hPa from NCEP/NCAR
> I looked at JFM average , and other seasons.
> The PC1 looks similar to their website ( http://www.cpc.ncep.noaa.gov/products/precip/CWlink/daily_ao _index/JFM_season_ao_index.shtml)
>
> However, when I regress the EOF with PC1 , I do not see dipole structure.
>
> Did I get the method right or somethings is wrong which I do not understand ?
>
> My final answer should be similar to the figure from NOAA website
> ( http://www.cpc.ncep.noaa.gov/products/precip/CWlink/daily_ao _index/ao.loading.shtml)

I really couldn't tell you. I did that work a long time ago. I don't
remember much about it, except that I spent weeks working it out. It
certainly seemed to produce correct answers (at least consistent with
other methods I tested) when I was doing that particular study.

But, I'm retired now, and even thinking about EOF analysis gives me a
headache. :-(

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thue. ("Perhaps thou speakest truth.")

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[Message index]

		EOF Arctic Oscillation for beginner By: siumtesfai on Fri, 06 March 2015 14:03
		Re: EOF Arctic Oscillation for beginner By: David Fanning on Fri, 06 March 2015 14:19
		Re: EOF Arctic Oscillation for beginner By: siumtesfai on Fri, 06 March 2015 14:37
		Re: EOF Arctic Oscillation for beginner By: David Fanning on Fri, 06 March 2015 14:58
		Re: EOF Arctic Oscillation for beginner By: siumtesfai on Fri, 06 March 2015 15:00

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