Re: [ferret_users] saving seasonal values on to a continuos time axis

Hai  Nuncio,
How are you?  I usually extract months, the way you want, as follows.This jnl file i saw somewhere in ferret threads provided by Jaison (i think).

use sst.nc
let month=l[gt=temp]
let DJF = if (mod(month,12) le 2) OR (mod(month,12) le 2) then 1
let MAM = if (mod(month,12) ge 3) AND (mod(month,12) le 5) then 1
let JJA = if (mod(month,12) ge 6) AND (mod(month,12) le 8) then 1
let SON = if (mod(month,12) ge 9) AND (mod(month,12) le 11) then 1
let winter_sst=temp*DJF
let spring_sst=temp*MAM
let summer_sst=temp*JJA
let fall_sst  =temp*SON

let sst_compr = COMPRESSL(wintersst)
list/x=60/y=15/l=1:10  sst_compr
PAUSE

! 1870-2010 --> 140 years --> 140*3=420 data points (time axis)

!defining to abstract axes one to put the data on the time axis

define axis/t=1:420:1 t420
let sst_djf = winter_sst[gt=t420@ASN]
list/x=60/y=15/t=1:10 sst_djf   !(or we can save the data or plot)

! we can extract the MAM, JJA, SON same as above. Please take care in case of DJF values extraction and check before you use the extracted data.

regards,
- Paul.

On Thu, Oct 13, 2011 at 2:40 PM, wrote:
Dear Ferreters
I like to save all the JJA,SON,DJF values of a 30 year long time series of global SST to seperate files on to  a continuous time axis.  My data begins at 1980 january and ends at 2010 dec
I need to save 30*3 values continuously, ie after I make each file, t axis must run from 1 to 90, with out bad values in between.

Best regards
nuncio

Nuncio Murukesh, Ph.D
Research Scientist.
National Centre for Antarctic and Ocean Research
Goa, 403804
India.
Ph: Cell-91 9890357423
off- 91 832 2525428

--
Steeven Paul Y
Research Fellow
National Institute of Oceanography(NIO)
Regional Center, Visakhapatnam (RCV)
176 Lawsons Bay Colony
Visakhapatnam - 530017

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