[ferret_users] eof variance

[golla nageswararao <ezeenag4u@xxxxxxxxx>]

Hi all,
   I am very new to EOF analysis. I did EOF analysis to weekly SSHA data for 954 weeks. I got some 55000 modes and all. But thing the mode variance is less i.e., 17 and 2nd mode -11,...When I saw time series plot of first mode it is mainly biannual peak. I having doubt that usually for Indian ocean the first mode should be annual with variance more than 50. But astonishingly the result different. How can I decrease the spread  of variance over large no. of modes in eof? Since data is huge, I averaged to 1°x1° and subjected to eof analysis, is this will do any thing with the result? I used the command eof_space(ssha,1) is that "1" any culprit? how to choose that variable? Can anybody throw some light on these doubts.

Thanks in advance.

-- 
With Best regards,
G.NageswaraRao,