Search found 136 matches

by Fantine
September 21st, 2020, 9:49 am
Forum: Dispersion Model
Topic: Deposition output analysis
Replies: 3
Views: 40

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...
by Fantine
September 18th, 2020, 9:34 am
Forum: Trajectory Model
Topic: Application Error - Initialization
Replies: 3
Views: 39

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.
by Fantine
September 18th, 2020, 9:27 am
Forum: Dispersion Model
Topic: Deposition output analysis
Replies: 3
Views: 40

Re: Deposition output analysis

HYSPLIT output average concentration. According to your set up, the model writes out 12-hr average concentration.
by Fantine
September 15th, 2020, 4:15 pm
Forum: HYSPLIT Workshop
Topic: Hello,
Replies: 8
Views: 384

Re: Hello,

The online system is limited for running a large number of trajectories. But it can be done running the model on your own machine. We have a good online tutorial for users desiring to do that: https://www.ready.noaa.gov/documents/Tutorial/html/index.html Here is the instruction for the installation ...
by Fantine
August 25th, 2020, 4:11 pm
Forum: MeteoInfo Software
Topic: ARL Current & Forecast Meteorology
Replies: 1
Views: 814

Re: ARL Current & Forecast Meteorology

The utility program in HYSPLIT to compute the Pasquill-Gifford categories is "vmixing.f". It uses diffusivity (m2/s) to obtain the stability classes. The reference paper is Draxler (1979) Atmospheric Environ., Vol 13., pp.1559-1564. Note that HYSPLIT has different options to estimate diffusivity. Th...
by Fantine
August 19th, 2020, 9:22 am
Forum: General questions on meteorological data needed for HYSPLIT
Topic: 2020 NARR data
Replies: 5
Views: 863

Re: 2020 NARR data

The 27-km WRF archive dataset is now accessible from the web interface. It can be used to run trajectory and dispersion.
For the EDAS40 dataset, we are working on it and plan to resume converting it soon.
by Fantine
July 30th, 2020, 11:30 am
Forum: General questions on meteorological data needed for HYSPLIT
Topic: 2020 NARR data
Replies: 5
Views: 863

Re: 2020 NARR data

We have stopped converting NARR data to ARL format since the end of 2019. Available NARR files are for the year 1979-2019. Instead of NARR data, we suggest to use the 27-km WRF archive: ftp://arlftp.arlhq.noaa.gov/pub/archives/wrf27km It is available for 1980 - March 2020 and will be updated to more...
by Fantine
June 25th, 2020, 2:29 pm
Forum: 1. Installing HYSPLIT
Topic: Add x window in set directories
Replies: 3
Views: 298

Re: Add x window in set directories

The "UNIX X-windows directory" setting is for Mac users, NOT PC users. You may go to the day-one recording where Roland talked about this, starting at 1:04:42 https://www.arl.noaa.gov/hysplit/hyspli ... ngs-06-22/
by Fantine
June 25th, 2020, 12:20 pm
Forum: 1. Installing HYSPLIT
Topic: Add x window in set directories
Replies: 3
Views: 298

Re: Add x window in set directories

I am not sure what do you mean...
Would you please tell us more about what you want to do? Do you want to be able to view windows (like figures or GUI) forwarding to your window machine from a UNIX or LINUX machine?
by Fantine
June 25th, 2020, 10:06 am
Forum: General questions on meteorological data needed for HYSPLIT
Topic: User entered met data
Replies: 1
Views: 274

Re: User entered met data

The utility program for user entered meteorological data is "stn2arl.f". Currently, the program only takes wind speed and direction, and then compute velocity variances based on them. The "stn2arl.f" needs to be modified for taking in measured velocity variances.