Search found 19 matches

by christopher.loughner
October 16th, 2018, 12:30 pm
Forum: HYSPLIT for LINUX
Topic: HYSPLIT Parallel mode installation
Replies: 6
Views: 1957

Re: HYSPLIT Parallel mode installation

HYSPLIT run with MPI should be faster. To run HYSPLIT from the testing directory and to keep track of the computational time use the following commands: with MPI using 4 CPUs: time -v mpirun -np 4 ../exec/hycm_std serially: time -v ../exec/hycs_std The only thing you need to change in the Makefile i...
by christopher.loughner
August 1st, 2018, 3:06 pm
Forum: Dispersion Model
Topic: Changing random number generator seed
Replies: 2
Views: 1746

Re: Changing random number generator seed

The seed id is set in hymodelc.F with the variable seed_id. seed_id is set to -1 and for MPI and ensemble runs, the seed_id is set to -ABS(job_id+1) and -ABS(ens_id), respectively. If you edit hymodelc.F, recompile your programs built from hymodelc.F by typing "make program_name" in the exec directo...
by christopher.loughner
March 16th, 2018, 10:47 am
Forum: Trajectory Model
Topic: How to transfer wrfout files to BIN file with ARL format
Replies: 1
Views: 1277

Re: How to transfer wrfout files to BIN file with ARL format

To convert a WRF-ARW output file to an ARL file using the gui, click on Meteorology -> Convert to ARL -> WRF-ARW, define the intput and output filenames and directories, and then process the data.

To convert using the executable in a linux environment, use the arw2arl program.
by christopher.loughner
March 16th, 2018, 10:27 am
Forum: General Comments
Topic: Trajacteroy model
Replies: 1
Views: 3509

Re: Trajacteroy model

Please review the HYSPLIT tutorial, specifically Chapter 6:

https://ready.arl.noaa.gov/documents/Tu ... index.html

Section 6.2 goes over how to perform a cluster analysis, which is what is shown in the Li et al. figure you attached.
by christopher.loughner
March 16th, 2018, 9:34 am
Forum: HYSPLIT for PCs
Topic: Question about meteorology output along trajectory
Replies: 1
Views: 1926

Re: Question about meteorology output along trajectory

Yes, the extracted meteorology variables that you see are interpolated WRF fields. HYSPLIT uses a linear interpolation technique. First, HYSPLIT interpolates WRF fields onto HYSPLIT's domain and then interpolates these new meteorology fields onto the trajectory (which is what you see in your output)...
by christopher.loughner
February 27th, 2018, 1:26 pm
Forum: Users
Topic: How does changing Ztop effects the trajectories at higher BL levels?
Replies: 1
Views: 1544

Re: How does changing Ztop effects the trajectories at higher BL levels?

1) No, Ztop does not impact simulated transport over topographical features. 2) 8 km AGL is well outside the PBL. A difference will only be found between a trajectory with Ztop set to 10km vs 20km if the trajectory encounters an extreme convective event that lofts particles above 10 km. More details...
by christopher.loughner
January 25th, 2018, 6:05 pm
Forum: Developers
Topic: [PATCH] conc2cdf Improvements
Replies: 3
Views: 3845

Re: [PATCH] conc2cdf Improvements

Thank you! We applied your updates to the code. conc2cdf.f is replaced by con2cdf3.f and con2cdf4.f. con2cdf3.f contains your patches that improve memory efficiency for IO and a fix to the gettime subroutine, but writes the output file as a NetCDF Version 3 file. con2cdf4.f contains all of your patc...
by christopher.loughner
December 19th, 2017, 3:49 pm
Forum: Dispersion Model
Topic: ichem=9 mode and mixed layer depth
Replies: 1
Views: 1865

Re: ichem=9 mode and mixed layer depth

1) For ichem=9, set the bottom level to the desired fraction of the mixed layer depth times 100. Therefore, for the bottom level to be half the mixed layer depth set the first output level to 50. The levels reported in the cdump file are averages for the entire domain. 2) Currently there is no optio...
by christopher.loughner
October 6th, 2017, 4:35 pm
Forum: Users
Topic: Strange result when converting WRF output to ARL format
Replies: 4
Views: 1798

Re: Strange result when converting WRF output to ARL format

This bug is now corrected. Please copy the attached files (setmap.f.fix.txt and cfgrec.f.fix.txt) into your data2arl/arw2arl/ directory, rename them setmap.f and cfgrec.f, and recompile. This bug fix corrects the rounding issue of the reference lat and lon, corrects the sync lat and lon calculation,...