Journal of Pure and Applied Geophysics 1 A Godunov-Type Scheme for Atmospheric Flows on Unstructured Grids. Euler and Navier-Stokes Equations NASH’AT AHMAD 1 , ZAFER BOYBEYI 2 , RAINALD LÖHNER 2 AND ANANTHAKRISHNA SARMA 1 1 Center for Atmospheric Physics Science Applications International Corporation Mclean, VA 22102 2 School of Computational Sciences George Mason University Fairfax, VA 20030 Corresponding author: Nash’at Ahmad Science Applications International Corporation 1710 SAIC Drive, MS T2-3-1 McLean, Virginia 22102 Phone: 703 676-4554 Fax: 703 676-5509 ahmadn@saic.com