[Wrf-users] OBS nudging
bbrashers at Environcorp.com
Wed Aug 24 18:09:27 MDT 2011
I have a few questions about using OBS nudging in WRF v3.3. I'm using
the 12km NAM data, which comes in 6 hour intervals. WPS ran fine, and I
have met_em files every 6 hours.
I have processed MADIS data to little_r format, and named the files
OBS:YYYY-MM-DD_HH. Each file contains 6 hours of data, which I've
confirmed via grep (e.g. "grep 200801 OBS:2008-01-29_18 | cut -c 327-336
| sort | uniq" shows the right time-stamps).
1. OBSGRID.EXE creates OBS_DOMAIN101, OBSDOMAIN102, etc. But each file
contains only ONE hour's data (the analysis hour +/- 30 minutes). The
OBS data for the next 5 hours is not output. How can I get OBSGRID.EXE
to create OBS_DOMAIN1* files that contain ALL the available data? I
want to nudge every hour, not every 6 hours.
2. The most recent notes in the WRF User's Guide
make no mention having to concatenate the OBS_DOMAIN1* output from
OBSGRID.EXE to OBS_DOMAIN101, but the tutorial notes
> do say so. Which is correct? Will WRF not read OBS_DOMAIN102,
3. If I want to nudge every hour, do I set auxinput11_interval_m = 60 in
WRF's namelist? Or is that supposed to match OBSGRID's record1 interval
4. If I want to keep nudging till the very end of my simulation, can I
set auxinput11_end_h = 99999?
The meaning of these two values is pretty unclear in the
README.namelist, README.obs_fdda, as well as the WRF User's Guide and
tutorial notes. If anyone can shed some light, I'd be most
This message contains information that may be confidential, privileged or otherwise protected by law from disclosure. It is intended for the exclusive use of the Addressee(s). Unless you are the addressee or authorized agent of the addressee, you may not review, copy, distribute or disclose to anyone the message or any information contained within. If you have received this message in error, please contact the sender by electronic reply to email at environcorp.com and immediately delete all copies of the message.
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the Wrf-users