Search found 130 matches

by Fantine
April 18th, 2016, 5:28 pm
Forum: Conversion programs
Topic: arw2arl
Replies: 1
Views: 3100

Re: arw2arl

The arw2arl program should pick up grid information from the header of a WRF output file to process the data. Please delete the old ARLDATA.CFG and run conversion program again.
If you still get error, please post the error message.
by Fantine
March 24th, 2016, 10:25 am
Forum: Trajectory Model
Topic: calculating trajectories with batch files
Replies: 3
Views: 4515

Re: calculating trajectories with batch files

Your MESSAGE file shows that you chose to use the fraction of mix layer depth (KMSL = 2) to define the trajectory's starting height. In this case, the 3rd column of starting locations in the CONTROL file should be values between 0 and 2. If you want the input height to be above ground level (meter),...
by Fantine
March 7th, 2016, 1:50 pm
Forum: Dispersion Model
Topic: input data for high resolution modeling
Replies: 1
Views: 1773

Re: input data for high resolution modeling

The good way to get high resolution met data for HYSPLIT is to run a regional met model (like WRF) in small grid spacing. If you have your own met data, you will need to convert the data to ARL format. Details about the required variables (including surface level and upper levels) and file format ar...
by Fantine
February 23rd, 2016, 11:13 am
Forum: Conversion programs
Topic: arw2arl Error: Projection Error
Replies: 2
Views: 2116

Re: arw2arl Error: Projection Error

The error message file (STDOUT.txt) indicates that the TRUELAT1 and TRUELAT2, that are read from wrfout netcdf global attributes, do not match. The WRF model actually ignores TRUELAT2 if polar projection is used (http://www2.mmm.ucar.edu/wrf/users/docs/user_guide_V3/users_guide_chap3.htm) but both p...
by Fantine
February 11th, 2016, 10:41 am
Forum: In-line WRF-HYSPLIT coupling
Topic: CAPTEX example IC/BC data
Replies: 7
Views: 10400

Re: CAPTEX example IC/BC data

You can rename the files to "d01" or make symbolic links as "d01" to those files. The namelist.input for the CAPTEX test case was set for the domain matching with WRF input files in this test case. The WRF domain for CAPTEX was configured to two nested domains (27-km and 9-km grid spacing). You can ...
by Fantine
February 3rd, 2016, 6:00 pm
Forum: In-line WRF-HYSPLIT coupling
Topic: inline HYSPLIT
Replies: 10
Views: 9586

inline HYSPLIT

The inline version of HYSPLIT (coupled with WRF-ARW) is now available.
More details on http://www.arl.noaa.gov/WRF_inline.php
by Fantine
September 23rd, 2015, 11:08 am
Forum: Conversion programs
Topic: arw2arl - Delta at period: -1380.0001 25
Replies: 1
Views: 2231

Re: arw2arl - Delta at period: -1380.0001 25

arw2arl can handle files containing multiple out time steps. The program reads a variable "XTIME" from WRF output and uses it to determine time interval between output periods. If the output interval is hourly, values of "XTIME" should be 60.00, 120.0, 180.0... etc. Please check that variable in you...
by Fantine
January 29th, 2015, 11:32 am
Forum: Conversion programs
Topic: arw2arl error
Replies: 4
Views: 2395

Re: arw2arl error

Are you using the latest version of arw2arl? The "X" was added to the WRFDATA.CFG as a placeholder for dealing with the precision issue of vertical vertical and precipitation fields. The arw2arl program should skip reading it from WRF output file. Using the older version, you will see the error mess...
by Fantine
August 29th, 2013, 3:02 pm
Forum: Conversion programs
Topic: Converting WRF data to ARL
Replies: 9
Views: 7233

Re: Converting WRF data to ARL

Please look at api2arl.f (should be in data2arl directory) which is a program to convert GRIB2 data into ARL format. Searching "lat-lon", you will see a section setting up GRIDS array for a regular lat-lon grid. Copy below the portion I am referring to: ! Set lat/lon of lower left point GRIDS(10)= C...
by Fantine
July 30th, 2013, 11:59 am
Forum: Conversion programs
Topic: Converting WRF data to ARL
Replies: 9
Views: 7233

Re: Converting WRF data to ARL

HYSPLIT can handle lat-lon grid. The "setmap.f" in arw2arl package takes care of the WRF projection. Extra coding will be needed for passing the corresponding grid information from WRF header to ARL format file. But the question will be, do your idealized WRF output files provide geographic referenc...