Search found 16 matches

by lagom
October 13th, 2018, 10:40 am
Forum: Dispersion Model
Topic: trajectories
Replies: 3
Views: 886

Re: trajectories

Hello, first of all thank you for your reply. I read the suggested posts but I've the problem that I can't set ICHEM=8 because I've to keep it equal to 5. About your question: I would like to compute statistics on quantities that are intrinsically lagrangian, it is not source attribution application...
by lagom
October 10th, 2018, 6:45 am
Forum: Dispersion Model
Topic: trajectories
Replies: 3
Views: 886

trajectories

Hello, I have a simple question and I'will be grateful to any suggestion: I would like to use the hysplit model in the dispersion mode but I'm interested in trajectories rather than concentrations, what is the best way to access this information? I used the PARDUMP file but it seems to be thought to...
by lagom
April 15th, 2018, 4:55 am
Forum: Users
Topic: AGL to sigma coordinates conversion
Replies: 1
Views: 1252

Re: AGL to sigma coordinates conversion

I forgot to specify that, as meteorological dataset, I'm using the NARR reanalysis in the ARL Hysplit format, downloaded from your site.

Thank you in advance,

bests

D.
by lagom
April 10th, 2018, 11:28 am
Forum: Users
Topic: AGL to sigma coordinates conversion
Replies: 1
Views: 1252

AGL to sigma coordinates conversion

Hi, I have two questions about the conversion from AGL to sigma terrain-following internal coordinates. 1- this conversion is done several times in the code but in the PAROUT subroutine it seems to be done differently than before, i.e. the scaling factor is the top of the model height instead of the...
by lagom
August 30th, 2016, 8:41 am
Forum: Dispersion Model
Topic: Boundary condition at ground level
Replies: 8
Views: 2592

Re: Boundary condition at ground level

Ok, thank you for clarifying my doubts.
Don't you think that keeping a fixed value for the surface layer height can be a too strong restriction?

Thanks for your replies

D.
by lagom
August 29th, 2016, 1:30 pm
Forum: Dispersion Model
Topic: Boundary condition at ground level
Replies: 8
Views: 2592

Re: Boundary condition at ground level

Ok, but what layer are we dealing with? Is it the surface layer (second internal model layer usually set around 75m heigh )? It is possible to set its thickness?

Thank you for the reply

D.
by lagom
August 29th, 2016, 11:08 am
Forum: Dispersion Model
Topic: Enhance precision using con2asc utility
Replies: 0
Views: 1380

Enhance precision using con2asc utility

Hi everybody!

When I run the con2asc utility to access to concentration values few meaningful digits are used, is it possible to enhance output values precision?

Thank you in advance

D.
by lagom
August 28th, 2016, 3:45 am
Forum: Dispersion Model
Topic: Boundary condition at ground level
Replies: 8
Views: 2592

Re: Boundary condition at ground level

Thank you for the suggestion but if I start the emission close to ground I think that with a very high deposition velocity all particles would be deposited immediately, because deposition is turned on in the surface layer (which default height is 75m in the model). I would like a model set up in whi...
by lagom
August 27th, 2016, 6:02 pm
Forum: Dispersion Model
Topic: Boundary condition at ground level
Replies: 8
Views: 2592

Re: Boundary condition at ground level

Thank you for the suggestion but if I start the emission close to ground I think that with a very high deposition velocity all particles would be deposited immediately, because deposition is turned on in the surface layer (which default height is 75m in the model). I would like to set the model such...
by lagom
March 17th, 2016, 4:46 am
Forum: General questions on meteorological data needed for HYSPLIT
Topic: routine for direct access to meteo data
Replies: 14
Views: 4833

Re: routine for direct access to meteo data

Thank you for your quick reply

bests

Daniele