NEA-1725 STAMPI.

1. NAME OR DESIGNATION OF PROGRAM:  STAMPI.

3. DESCRIPTION OF PROGRAM OR FUNCTION

A new method to couple atmosphere and land-surface models using the message passing interface (MPI) was proposed to develop an atmosphere-land model for studies on heat, water,and material exchanges around the land surface. A non-hydrostatic atmospheric dynamic model of Pennsylvania State University and National Center for Atmospheric Research (PUS/NCAR-MM5) and a detailed land surface model (SOLVEG) including the surface-layer atmosphere, soil, and vegetation developed at Japan Atomic Energy Research Institute (JAERI) are used as the atmosphere and land-surface models, respectively. Concerning the MPI, a message passing library named STAMPI developed at JAERI that can be used between different parallel computers is used. The models are coupled by exchanging calculation results by using MPI on their independent parallel calculations. The modifications for this model coupling are easy, simply adding some modules for data exchanges to each model code without changing each model''s original structure. Moreover, this coupling method is flexible and allows the use of independent time step and grid interval for each model.

10. REFERENCES

- Jack Dongarra, Peter Kacsuk et.al (Editor)
Recent Advances in Parallel Virtual Machine and Message Passing Interface,
Proceedings of 7th European PVM/MPI Users'' Group Meeting, Balatonfured, Hungary, September 2000, pp200-207

- Haruyasu NAGAI:
New Method for Model Coupling using STAMPI: Application to the Coupling of
Atmosphere Model(MM5) and Land-Surface Model(SOLVEG)
JAERI-Data/Code 2003-021 (December 2003)

15. NAME AND ESTABLISHMENT OF AUTHORS

Haruyasu NAGAI
Department of Environmental Sciences
Tokai Research Establishment
Japan Atomic Energy Research Institute
Tokai-mura, Naka-gun, Ibaraki-ken
Japan

JAERI-Data/Code 2003-021 Report in electronic form