HYSPLIT Model Updates

Highlights of Recent Updates

Default option for 3D particles to pre-compute random numbers for faster computations
Namelist option to define an external precipitation field to replace model precipitation values
New program to spatially average the binary concentration fields
Major revision to the color fill concentration plotting program to match contour program
Created a more generalized GRIB2 converter that uses the ECMWF GRIB_API libraries
Added bootstrap resampling as an option in computing the correlation when analyzing results
Option to explicity set the concentration level for computing exceedence probablilities
Fixed error in plotting shapefile map background files for lines outside of the plot domain
Revised contour labels to use a fixed format for a normal range of values rather E-format
Corrected the WRF-ARW converter to handle polar stereographic projections as well as Lambert Conformal
Compute the cloud fraction based upon RH when the cloud fraction field is missing
Implemented the variable (stable or unstable) Lagrangian time scale option
Permit different vertical motion options when using multiple meteorological data
Set the name of diagnostic vertical mass distribution file in the namelist

New namelist variables to define a stability dependent lagrangian time scale
Improved conversion of KML to KMZ using an updated version of Zip
A new GUI option to plot only a fraction of the particles for clearer displays
Revised utility programs to support meteorological grids exceeding 999 points
Eliminated negative sign when cloud field missing, corrected resulting wet deposition
New vertical velocity options for spatial averaging and vertical damping

Most changes since V265 were minor addressing a variety of issues ...
Added GUI option to batch process ensemble simulations for performance statistics
Solved issue with labeling of Google Earth KMZ files for concentration plotting
Created FTP log file to document problems that may occur with data transfers
Fixed problem associated with adding concentration files together near the prime meridian
Closed the particle input file after reading so the same file can be used for output
Added a new namelist option to turn on or off radioactive decay of deposited material

Added specific humidity and mixing ratio as output options for trajectories
New program to map model performance statistics
Modified compuation of KSP to exclude zero measured-predicted
When using time averaged velocity fields for transport turn off interpolation
Added additional data sets to forecast download menu
Using updated installer/uninstaller to eliminate false positive virus detections

The default in-cloud particle wet removal coefficient was reduced
When multiple species are defined on one particle, gravitational settling only occurs on last
Spatial interpolation of the precipitation field for wet removal calculations is turned off
Wet removal only occurs when both precipitation and clouds are defined in the same grid cell
Definitions for the cloud bottom and top have been moved to the namelist file
The hourly particle number release rate can now be defined explicitly
The local time zone can be shown in the concplot label rather than UTC
Corrections to KML files to define contours that span the International Dateline
The testing script was updated to include the simulation of CAPTEX release two
Utility and plotting programs were updated to permit plotting of data points in DATEM format
The WRF-ARL decoder was corrected to handle extra user defined 3D variables