caa a22 4500 469052643 CHVBK 20180323132834.0 cr unu---uuuuu 170328e19920301xx s 000 0 eng 10.1007/BF01025507 doi (NATIONALLICENCE)springer-10.1007/BF01025507 Golding B. Bureau of Meteorology Research Centre, Melbourne, Australia aut An efficient non-hydrostatic forecast model [Elektronische Daten] [B. Golding] Summary: A semi-implicit non-hydrostatic mesoscale forescasting model, which is used operationally in the United Kingdom Meteorological Office, has been reformulated using two time levels and semi-Lagrangian advection so as to permit longer timesteps. The boundaries are found to be an important influence on the model's stability and two methods of suppressing wave reflection are described with the aid of a one-dimensional experiment. The model's responses to two dimensional flow over a ridge and to three-dimensional flow over an isolated mountain are then demonstrated. The reformulated model is more efficient than the original provided a timestep at least twice as long can be used. It is also superior both in having minimal damping (except at the boundaries), and in the accuracy of the advection scheme. Springer-Verlag, 1992 Meteorology and Atmospheric Physics Springer-Verlag 50/1-3(1992-03-01), 89-103 0177-7971 50:1-3<89 1992 50 703 https://doi.org/10.1007/BF01025507 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01025507 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Golding B. Bureau of Meteorology Research Centre, Melbourne, Australia aut NATIONALLICENCE 773 0- Meteorology and Atmospheric Physics Springer-Verlag 50/1-3(1992-03-01), 89-103 0177-7971 50:1-3<89 1992 50 703 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer