1. Initial Adaptation of the Advanced Regional Prediction System to the Alliance Environmental Hydrology Workbench
Dan Weber, Henry Neeman,
Joe Garfield and Kelvin Droegemeier
CAPS/University of Oklahoma
November, 2000

2. ARPS Model General features
Fully self-contained meso- and storm-scale prediction model
Can be run at any resolution
CAPS has run at 10 m to 60 km
Fortran 77 with Fortran 90 extensions
Fortran 90 version (5.0)
Extensive in-code documentation
External user’s guide (available online)
-based user support system + online FAQ
Code available online (
Entire ARPS system is in the public domain - no restrictions
Designed for all architectures
MPI for shared and distributed memory parallel computers
UNIX workstations
Linux and Windows PCs

3. New Concept: Abilene + NEXRAD
U-WA
CFCF
NCEP
FSL
NCDC OU

4. Road to a Working ARPS/Workbench GUI
Preprocessing issues
data acquisition
data preparation
model preparation
Runtime issues
Computer platform(s)
Coupled model access and data exchange
Post-processing
web-base graphics output
data archive

5. Statement of Work Vision for 1999-2000
Incorporate ARPS into the EH workbench via a web-based GUI
Prepare a real data case for use in ARPS
Couple ARPS with other Workbench applications (i.e. existing watershed and river flow models)
Perform an ARPS simulation within the Workbench Environment
Display ARPS forecast output using Workbench visualization tool (VISAD)

6. Interactive Components
Creation of New Sessions
Session Management
ARPS System Management
Note: Coded using HTML and PERL

7. Interactive Components (continued)
Creation of New Sessions
Create scratch subdirectory on compute server
Obtain ARPS source, precompiled libraries, and default input files (approximately 3 minutes)
Generate new browser window associated with current session

8. Interactive Components (continued)
Session Management
List of active sessions
Delete or recover sessions
Upload specific initialization data files (includes ability to browse local client)

9. Interactive Components (continued)
ARPS System Management
Selection of component program (e.g. arps, adas, arpstern, etc)
Modification of selected input values (e.g. dx,output format, computational mixing coefficients, etc)
Run component program
recompile program to new specifications
run program

10. Current Status November, 2000
Simple working version of an ARPS portal to the EH Workbench
Work continues towards expanding the current capabilities (real data case,mpi,F90)

11. Vision for
Continue the EH Workbench web-based GUI development (initialization, MPI etc)
Perform an ARPS simulation within the Workbench Environment
Couple ARPS with other Workbench applications (i.e. existing watershed and river flow models)
Display ARPS forecast output using Workbench visualization tool (VisAD)

12. Personnel for
Dan Weber: ARPS case studies, coupled system and support the GUI interface and optimization efforts (3 months, Project Manager and Research Scientist)
Henry Neeman: Continued development of the Workbench interface, coupled system, visualization and optimization efforts (2 months, Research Scientist)
Joe Garfield: Continued development of the Workbench interface (6 months, undergraduate student)

13. Benefits from the ARPS/Workbench Interface
A model for other workbench applications
A model for coupled model system interaction
The finished product can be used to test the GRID/Virtual Machine Room concept

14. Concerns for the Next Year
Working version of the interface between models
Communications/permissions/security issues
Visualization software
Enough time to complete the project (i.e. all components available for generation of the finished product