Search found 36 matches

by mingwang
August 12th, 2019, 7:56 am
Forum: Dispersion Model
Topic: Deposition Velocity
Replies: 4
Views: 376

Re: Deposition Velocity

Dear alicec,

Thank you very much for your reply. I really appreciate your help. It does make sense to me now. Thanks. :)


Kind Regards,

Ming
by mingwang
August 1st, 2019, 10:16 am
Forum: Dispersion Model
Topic: Diameter (µm) Density (g/cc) and Shape
Replies: 6
Views: 507

Re: Diameter (µm) Density (g/cc) and Shape

Thank you very much for your help, alicec.

I am not clear about the sentence below. Could you please rephrase it? Your help would be much appreciated. Thanks.

'Met data output is valid for the point at which it is output.'
by mingwang
August 1st, 2019, 10:12 am
Forum: Dispersion Model
Topic: Deposition Velocity
Replies: 4
Views: 376

Re: Deposition Velocity

Dear alicec, Thank you very much for your reply. I attempt to specify a value for the deposition velocity, rather than calculating it from the particle diameter and density. From what I understand, for particle dispersion, if a dry deposition velocity is specified, then that value is used as the par...
by mingwang
July 29th, 2019, 7:51 am
Forum: Dispersion Model
Topic: Deposition Velocity
Replies: 4
Views: 376

Deposition Velocity

Dear all, I would just like to confirm somethings on dry deposition. Question 1: Is the parameter (deposition velocity) in HYSPLIT actually settling velocity in dry deposition due to gravity? Question 2: Is deposition velocity applied to all particles at any time for dry deposition during simulation...
by mingwang
July 28th, 2019, 8:21 am
Forum: Dispersion Model
Topic: Diameter (µm) Density (g/cc) and Shape
Replies: 6
Views: 507

Re: Diameter (µm) Density (g/cc) and Shape

Dear Fantine, Thank you very much for your reply. I am sorry that I did not describe Question 2 well. I was asking whether the lat/long coordinate represents the centre of a grid cell or the corner of a grid cell (e.g. the top left). For example, each conc grid cell (output file from HYSPLIT runs) i...
by mingwang
July 11th, 2019, 2:20 am
Forum: Dispersion Model
Topic: Diameter (µm) Density (g/cc) and Shape
Replies: 6
Views: 507

Re: Diameter (µm) Density (g/cc) and Shape

Dear alicec, Thank you very much for your help. I will look at these papers and get back to you later. I have another two questions now. I use NCEP/NCAR Global Reanalysis Data to run HYSPLIT. Question 1: Do I have to set ‘starting time (year, month, day, hour)’ as the UTC time in HYSPLT, regardless ...
by mingwang
July 8th, 2019, 9:26 am
Forum: Dispersion Model
Topic: Diameter (µm) Density (g/cc) and Shape
Replies: 6
Views: 507

Diameter (µm) Density (g/cc) and Shape

Dear all, I am using HYSPLIT to model insect dispersal including dry deposition. Insects are not a perfect sphere. I am not sure how to set ‘Diameter (µm)’, and ‘Shape’. I guess that ‘Diameter (µm)’ refers to the diameter of the cross section (a circle) of a particle. If so, would I be able to use t...
by mingwang
June 26th, 2019, 10:21 am
Forum: Dispersion Model
Topic: Time Step and Concentration Calculation
Replies: 35
Views: 1534

Re: Time Step and Concentration Calculation

Dear alicec,

Thank you very much for your help. I really appreciated it. Thanks. :)


Kind Regards,

Ming
by mingwang
June 20th, 2019, 5:28 am
Forum: Dispersion Model
Topic: Time Step and Concentration Calculation
Replies: 35
Views: 1534

Re: Time Step and Concentration Calculation

Dear alicec, Thank you very much for your help. As you suggested, it works. I would be able to get the exactly same number of deposited particles between the output file (the number of deposited particles) and the MESSAGE file (the number of deposited particles = total released particles - the numbe...
by mingwang
June 19th, 2019, 12:17 am
Forum: Dispersion Model
Topic: Time Step and Concentration Calculation
Replies: 35
Views: 1534

Re: Time Step and Concentration Calculation

Dear alicec,

I am very sorry that I attached a wrong CONTROL file for the six source location simulation. Please find the attached correct one.

Your help would be much appreciated. Thanks.


Kind Regards,

Ming