Search found 148 matches

by Fantine
April 6th, 2021, 12:10 pm
Forum: Conversion programs
Topic: NARR2ARL
Replies: 9
Views: 5899

Re: NARR2ARL

The NARR archive on tp://arlftp.arlhq.noaa.gov/narr/ is 3 hourly data. Below lists the timestamps in the file NARR200001 => ~/exec/chk_times |more Enter directory name: ~/narr/ Enter file name: NARR200001 Opened file: 0 1 1 0 Grid size and lrec: 309 237 73233 73283 Header record size: 1612 1 0 1 1 0...
by Fantine
March 4th, 2021, 6:07 pm
Forum: Users
Topic: Computed Vertical Wind Speed Values
Replies: 3
Views: 388

Re: Computed Vertical Wind Speed Values

The subroutine for computing WWND from the divergence is [your HYSPLIT dir]/library/hysplit/metdiv.f.
You may consider using vmixing.f (which extract meteorological stability parameters) to add WWND in the extraction. It is [your HYSPLIT dir]/source/vmixing.f
by Fantine
March 1st, 2021, 1:26 pm
Forum: Users
Topic: Computed Vertical Wind Speed Values
Replies: 3
Views: 388

Re: Computed Vertical Wind Speed Values

You can use the "profile" program to extract the vertical wind (WWND) from the ARL formatted file for a location with given lat/long.
For running with command lines => [your HYSPLIT directory]/exec/profile.
For using GUI => https://www.ready.noaa.gov/hysplitusersguide/S132.htm
by Fantine
February 17th, 2021, 11:36 pm
Forum: Conversion programs
Topic: Issue with MERRA-2 ARL files
Replies: 3
Views: 590

Re: Issue with MERRA-2 ARL files

The mer2arl converter was updated. It can be downloaded from the HYSPLIT svn repository.
by Fantine
February 8th, 2021, 12:21 pm
Forum: Conversion programs
Topic: arw2arl: Output time interval not constant
Replies: 4
Views: 779

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...
by Fantine
February 2nd, 2021, 10:14 am
Forum: Trajectory Model
Topic: Back trajectory on previous years
Replies: 1
Views: 309

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
by Fantine
January 29th, 2021, 11:06 am
Forum: Trajectory Model
Topic: Strange output when hitting the ground
Replies: 3
Views: 2056

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...
by Fantine
January 27th, 2021, 10:32 pm
Forum: Conversion programs
Topic: Issue with MERRA-2 ARL files
Replies: 3
Views: 590

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.
by Fantine
December 17th, 2020, 11:26 am
Forum: Trajectory Model
Topic: Getting Trajectory Data
Replies: 2
Views: 562

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.
by Fantine
November 25th, 2020, 4:29 pm
Forum: General questions on meteorological data needed for HYSPLIT
Topic: WRF 27km meteorological fields
Replies: 2
Views: 887

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...