Re: [ferret_users] seasonal averaging

[jagadish karmacharya <j_karmacharya@xxxxxxxxx>]

HI Nadia,
  
  There is a simple and quick process for creating climatology.pls try following:
  
  use SRF-ECHAM-1960-70.nc
  use climatological_axes
  cancel data climatological_axes
  let ta_clm=ta[d=1,gt=month_reg@mod]
  
  This variable ta_clm gives the monthly climatology from Jan to Dec; For example If you want to plot summer climatology.try
  
  fill ta_clm[l=6:9@ave] 
  
  Please check following ferret FAQ for the futher explanation(  and  for other general issues related with data analysis etc.)
  
  http://ferret.pmel.noaa.gov/Ferret/FAQ/analysis/climatologies.html

  Hope this helps.
  
  Jagadish
  
  
"nadia.rehman" <nadia.rehman@gcisc.org.pk> wrote:
>   Hi users,
> I have done seasonal averages for ten (1961:1970) years. The procedure i have followed for summer
>  averages is as follows:
> use "SRF-ECHAM-1960-70.nc"
> let mod1=ta[l=18:21@ave]
> let mod2=ta[l=30:33@ave]
> let mod3=ta[l=42:45@ave]
> let mod4=ta[l=54:57@ave]
> let mod5=ta[l=66:69@ave]
> let mod6=ta[l=78:81@ave]
> let mod7=ta[l=90:93@ave]
> let mod8=ta[l=102:105@ave]
> let mod9=ta[l=114:117@ave]
> let mod10=ta[l=126:129@ave]
> let mod11=mod1+mod2+mod3+mod4+mod5+mod6+mod7+mod8+mod9+mod10
> let modave=(mod11/10)-273.16
>
> it  z short one because i have used it for 10 years but if i want to do it  for 30 or 50 years then i think it would be to long and also time  taking. Is there any short way to calculate the above summer  averages???????????
> Thanks  
>
> --
> Nadia Rehman Yousafzai
> Research Fellow (Climate Section)
> Global Change Impact Studies Centre
> First Floor Saudi Pak tower 
> Blue Area Islamabad Pakistan
> Ph :   92-51-9219785
> Fax : 92-51-9219787 
> --

---

Blab-away for as little as 1¢/min. Make  PC-to-Phone Calls using Yahoo! Messenger with Voice.