[ncl-talk] DJFM season average

Sujata Mandke amin at tropmet.res.in
Mon Dec 3 00:05:50 MST 2018


Respected Dennis Shea sir, 

I followed your suggestions of confirming DJFM average 
by printing values at example lot/lon point and then manually 
calculating at the same lat/lon point. I found that 
the way DJFM average is calculated is correct. 
Thanks a lot one again. 
With best regards 
Dr. Sujata Mandke 
IITM,PUNE 

From: "S.Amin" <amin at tropmet.res.in> 
To: "Dennis Shea" <shea at ucar.edu> 
Cc: "ncl-talk" <ncl-talk at ucar.edu> 
Sent: Friday, November 30, 2018 11:11:37 AM 
Subject: Re: [ncl-talk] DJFM season average 

Respected Dennis Shea sir, 

Thanks a lot for detail steps for confirming 
DJFM average estimate. 
I will do the same. 

With best regards 
Sujata 


From: "Dennis Shea" <shea at ucar.edu> 
To: "S.Amin" <amin at tropmet.res.in> 
Cc: "ncl-talk" <ncl-talk at ucar.edu> 
Sent: Thursday, November 29, 2018 8:25:28 PM 
Subject: Re: [ncl-talk] DJFM season average 

I think it is best that you print out the values 

You have: 

y = runave_n_Wrap(st,4,0,0) 
sdjfm =y(0::12,:,:) 

I suggest you print the values at some location 

LAT = ... 
LON = ... 

y = runave_n_Wrap (st,4,0,0) 

print (st&time+" "+st(:,{LAT},{LON})+" "+y(:,{LAT},{LON}) ) 

Since 'runave' prefers an odd running average [eg: 3, 5, 101] to avoid index ambiguity, you can manually verify the calculated values and the index to which 
the average is assigned. 

Then when you do the 

sdjfm =y(...) 
printVarSummary (sdjfm) 

print (sdjfm&time+" "+sdjfm(:,{LAT},{LON})) 

You can feel confident in your result 



On Thu, Nov 29, 2018 at 2:59 AM Sujata Mandke < [ mailto:amin at tropmet.res.in | amin at tropmet.res.in ] > wrote: 


Dear NCL community, 
Greetings! 

I am calculating December to March (DJFM) season average 
(NCL script attached), as per the guidelines from NCL-TALK archives. 
(Since all functions in NCL are available for 3-month average season). 
I want to confirm whether this is correct way of calculating DJFM average? 
Or else there is another method available in NCL version 6.4? 

Many thanks in advance. 
With best regards 
Dr. Sujata Mandke 
Scientist, Indian Institute of Tropical Meteorology, 
PUNE._______________________________________________ 
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