caa a22 4500 469052295 CHVBK 20180323132833.0 cr unu---uuuuu 170328e19920301xx s 000 0 eng 10.1007/BF01029563 doi (NATIONALLICENCE)springer-10.1007/BF01029563 Egger J. Metorologisches Institut, Universität München, Theresienstraße 37, D-W-8000, München, Germany aut The orographic deformation and retardation of a frontal zone [Elektronische Daten] [J. Egger] Summary: A three-layer version of Davies' (1984) model is used to investigate orographic impact on fronts. Uniform potential vorticity is assumed for each layer. The uppermost layer represents the flow ahead and above a frontal zone approaching a mountain. The frontal zone is represented by the second layer and the cold air behind it by the third layer of the model. The upper layer induces weak frontogenesis when the frontal zone is moving towards the mountain. However, rapid frontogenesis sets in when the zone's leading edge is climbing up the slope while part of the frontal zone is still in the plain. When, finally, the whole frontal zone is moving up the slope, the flow evolution strongly depends on the structure of the frontal zone: frontolysis as well as frontogenesis can occur. Springer-Verlag, 1992 Meteorology and Atmospheric Physics Springer-Verlag 48/1-4(1992-03-01), 131-137 0177-7971 48:1-4<131 1992 48 703 https://doi.org/10.1007/BF01029563 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01029563 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Egger J. Metorologisches Institut, Universität München, Theresienstraße 37, D-W-8000, München, Germany aut NATIONALLICENCE 773 0- Meteorology and Atmospheric Physics Springer-Verlag 48/1-4(1992-03-01), 131-137 0177-7971 48:1-4<131 1992 48 703 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer