[Ferret] calculate climatologies from multiple LARGE files

[zhen.li@xxxxxxxxxxxxx]

Hi Ferret Users:

I want to calculate a monthly average from multi-year (21 years) model output.
I am aware of the example of "calculation of climatologies and 
climtological anomalies"
in Ferret FAQ section. And I want to do the same thing. But, the exception 
is that
my files are very large.

I have multi-year monthly temperature files, temp_1964.nc .... 
temp_1984.nc', with each file at 280MB
(Note that I couldn't shrink this file anymore, because it contains only 
the necessary information.
The array size is [12 43 390 700]).

I tried to use NCO command "ncrcat" to combine those files first. I can 
concatenate 6 files using "ncrcat",
but as the number of files increases to 10, I got an error 
message.  Ferret's "append" function
is not an option either, because it requires lots of memory.

Anyone knows how to solve my problem?

Thanks,

Zhen


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