Re: (no subject)

Gang,

If re-run WRF model, you do not end to change anything from WRF
registry.EM.
You only need to change WRF namelist.input to save WRF output in
multiple files.

Also, check NCL script to see if you can read in fewer time-levels.
For example, instead of read in all 1800 time level, try read in one
at a time, or several at a time.

otherwise, your single variable will have 60G, which very few machine
has such big memory.

Regards,

Wei Huang
huangwei_at_ucar.edu
Consulting Services Group/CISL
National Center for Atmospheric Research
P.O. Box 3000 (1850 Table Mes Dr.)
Boulder, CO 80307-3000 USA
(303) 497-8924

On Dec 8, 2008, at 10:06 PM, Gang Liu wrote:

> Hi Dave and David,
>
> Thanks for your advice.
>
> I have just tried the option
> “setfileoption("nc","SuppressClose",False)” David instructed me.
> However this still does not work. The execution of the NCL script
> just collapsed without any error information displaying. I doubt it
> is still related to memory issue, i.e., the NCL script is not able
> to read variables out of the WRF output data file.
>
> The types and dimensions of the data variables such as U, V, W, T,
> TKE, etc. are float and (1800, 201, 201, 201), which are (nt, nz,
> ny, nx) respectively.
>
> It now looks like that there is only one way remaining to me, which
> is to break the mega data file up by variable rather than by time
> step, as suggested by you. Anyway, it has to be broken up.
>
> Could you please instruct me how to break it up by variable? I have
> ever tried it by modifying the Registry.EM file in WRF to reduce the
> size of the output data file. But the way often easily led to errors
> of WRF running.
>
> Thank you very much.
>
> Gang
>
> ************************************
> Gang Liu
> Department of Atmospheric Sciences
> Nanjing University
> Nanjing 210093
> P. R. China
> Phone: 86-25-83595185 (o)
> Email: gangliu_at_nju.edu.cn
> ************************************
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Received on Mon Dec 08 2008 - 22:13:48 MST