Two users called attention to the output from specx_anal when
iopt=1 [remove linear trend prior to computing the spectrum].
The resulting spectrum exhibited large spectral estimates
at the very lowest frequencies.
The appropriate 'fix' will be included in v032.
--- In the mean time, if the user wants to detrend the series prior to computing the spectrum, use NCL's "dtrend" function:http://ngwww.ucar.edu/ngdoc/ng/ref/ncl/functions/dtrend.html
prior to invoking "specx_anal"
EG:
yDetrend = dtrend (y,False) ; remove linear trend iopt = 0 ; set internal detrend option to zero dof = specx_anal (yDetrend,iopt,jave,pct)
--- Sorry
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