[ncl-talk] Seasonal mean from tridaily data for many years

[Dennis Shea]

re:  "remove the seasonal mean of individual years"

---
This is ambiguous.

[1] What do ou mean by "seasonal mean" ?
[2] Also, rather difficult to address without knowing the variable structure

[1]
If by "seasonal mean" you mean the average (a scalar) of all the tri-daily
values, then loop over each year an subtract the current year's overall mean

[2]
For *each* time (say, 0Z, 8Z, 16Z) find the overall 0/8/16 means and then
loop and subtract those values.

[3]
Maybe run a simple weighted running average over the time means and then
subtract the smoothed values.




On Mon, May 1, 2017 at 12:37 AM, gibies george <gibies at tropmet.res.in>
wrote:

> Dear NCL users,
>
> I have tridaily data for June-September (JJAS) season for many years. What
> is the best option to remove the seasonal mean of individual years out of
> this data?
>
> thanks and regards
>
>
> *Dr. Gibies George,*
> *Project Scientist C,*
> *Monsoon Mission,*
>
> *Indian Institute of Tropical Meteorology,Dr. Homi Bhabha Road, *
> *NCL Post Office, *
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> *Pashan, Pune 411008, India.Office Teleph  : +912025904423
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