Search found 185 matches
- February 17th, 2021, 11:36 pm
- Forum: Conversion programs
- Topic: Issue with MERRA-2 ARL files
- Replies: 4
- Views: 22995
Re: Issue with MERRA-2 ARL files
The mer2arl converter was updated. It can be downloaded from the HYSPLIT svn repository.
- February 8th, 2021, 12:21 pm
- Forum: Conversion programs
- Topic: arw2arl: Output time interval not constant
- Replies: 4
- Views: 21518
Re: arw2arl: Output time interval not constant
I downloaded the file (wrfout_d01_20210207_0000.nc) from the website and ran the converter (arw2arl) successfully using the WRFDATA.CFG attached to your post. The error message you got came from checking the "XTIME" variable in the WRF file. You can add "-d" option when running arw2arl that will giv...
- February 2nd, 2021, 10:14 am
- Forum: Trajectory Model
- Topic: Back trajectory on previous years
- Replies: 1
- Views: 3215
Re: Back trajectory on previous years
You can use the archive data. The link and description of available datasets are listed => https://www.ready.noaa.gov/archives.php
- January 29th, 2021, 11:06 am
- Forum: Trajectory Model
- Topic: Strange output when hitting the ground
- Replies: 3
- Views: 5429
Re: Strange output when hitting the ground
About trajectory hitting the ground, I would recommend looking at these posts on the forum where the issue has been discussed. https://hysplitbbs.arl.noaa.gov/viewtopic.php?t=295 https://hysplitbbs.arl.noaa.gov/viewtopic.php?t=1523 The "NaN" and asterisks in the trajectory output are more like a num...
- January 27th, 2021, 10:32 pm
- Forum: Conversion programs
- Topic: Issue with MERRA-2 ARL files
- Replies: 4
- Views: 22995
Re: Issue with MERRA-2 ARL files
Thank you for reporting the issue. We will fix the bug found in the MERRA2 converter. Stay tuned.
- December 17th, 2020, 11:26 am
- Forum: Trajectory Model
- Topic: Getting Trajectory Data
- Replies: 2
- Views: 3547
Re: Getting Trajectory Data
The trajectory output from HYSPLIT is in ASCII format. Here shows the file format: https://www.ready.noaa.gov/hysplitusersguide/S263.htm
The file name by default is "tdump" or whatever you put in the CONTROL file.
The file name by default is "tdump" or whatever you put in the CONTROL file.
- November 25th, 2020, 4:29 pm
- Forum: General questions on meteorological data needed for HYSPLIT
- Topic: WRF 27km meteorological fields
- Replies: 2
- Views: 3153
Re: WRF 27km meteorological fields
The description of WRF variables used in HYSPLIT is available in https://ready.arl.noaa.gov/data/web/models/hysplit4/decoders/Note-arw2arl.pdf DIFR, DIFT, and DIFW are the difference fields for greater precision for rain, tke, and vertical velocity. Extra variables not listed in the technical note a...
- October 2nd, 2020, 3:32 pm
- Forum: Trajectory Model
- Topic: Trajectory heights from WRF
- Replies: 2
- Views: 3925
Re: Trajectory heights from WRF
HYSPLIT does the interpolation between layers. If you set the starting height of the trajectory at 2 m, HYSPLIT starts the trajectory calculation at 2 m above ground level (terrain height from WRF).
- September 21st, 2020, 9:49 am
- Forum: Dispersion Model
- Topic: Deposition output analysis
- Replies: 3
- Views: 3125
Re: Deposition output analysis
For hourly averaged concentration, you can set the sampling interval to "00 01 00" in the CONTROL file. More detail about setting up the CONTROL for the simulation grid can be found in the user guide: https://ready.arl.noaa.gov/hysplitusersguide/S313.htm (bullet 25 is for sampling interval). In addi...
- September 18th, 2020, 9:34 am
- Forum: Trajectory Model
- Topic: Application Error - Initialization
- Replies: 3
- Views: 3772
Re: Application Error - Initialization
The error message is about the trajecotry start time before the start time of the meteorological data.
Please check the CONTROL file. For computing trajectories for a month, you will need to provide meteorogical data covering the whole month.
Please check the CONTROL file. For computing trajectories for a month, you will need to provide meteorogical data covering the whole month.