*1T. Yabe, R. Tanaka, T. Nakamura, F. Xiao, "An exactly conservative semi-Lagrangian scheme (CIP-CSL) in one dimension", Mon. Weather Rev. 129, pp.332-344, 2001. *2T. Nakamura, R. Tanaka, T. Yabe and K. Takizawa, "Exactly Conservative Semi-Lagrangian Scheme for Multi-dimensional Hyperbolic Equations with Directional Splitting Technique", J. Comput. Phys. 174, pp.171-207, 2001. *3K. Takizawa, T. Yabe, T. Nakamura, "Multi-dimensional semi-Lagrangian scheme that guarantees exact conservation", Comput. Phys. Commun. 148(2), pp.137-159, 2002.