caa a22 4500 469052597 CHVBK 20180323132834.0 cr unu---uuuuu 170328e19920301xx s 000 0 eng 10.1007/BF01025503 doi (NATIONALLICENCE)springer-10.1007/BF01025503 An isentropic vertical coordinate model: Design and application to atmospheric frontogenesis studies [Elektronische Daten] [A. Arakawa, C. Mechoso, C. Konor] Summary: The isentropic vertical coordinate model developed at UCLA is briefly reviewed. The review includes an outline of the approach used to overcome technical difficulties in handling model layers with small mass. The model's performance is demonstrated by simulating the evolution of a middle-latitude baroclinic disturbance. During the evolution of the disturbance, sharp frontal zones are generated in the upper and middle troposphere with realistic tropopause folding. The extent to which different dynamical processes contribute to frontogenesis is analyzed. While the model successfully simulates frontogenesis in the upper and middle troposphere, it has a difficulty in simulating surface fronts. The difficulty arises due to the lack of degrees of freedom in surface temperatures since an isentropic vertical coordinate model requires a large number ofvertical layers to obtain a highhorizontal resolution at the lower boundary. This suggests the potential of a hybrid vertical coordinate, which approaches θ at upper levels and σ at lower levels. Springer-Verlag, 1992 Arakawa A. Department of Atmospheric Sciences, University of California, 90024, Los Angeles, CA, USA aut Mechoso C. Department of Atmospheric Sciences, University of California, 90024, Los Angeles, CA, USA aut Konor C. Department of Atmospheric Sciences, University of California, 90024, Los Angeles, CA, USA aut Meteorology and Atmospheric Physics Springer-Verlag 50/1-3(1992-03-01), 31-45 0177-7971 50:1-3<31 1992 50 703 https://doi.org/10.1007/BF01025503 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01025503 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Arakawa A. Department of Atmospheric Sciences, University of California, 90024, Los Angeles, CA, USA aut NATIONALLICENCE 700 1- Mechoso C. Department of Atmospheric Sciences, University of California, 90024, Los Angeles, CA, USA aut NATIONALLICENCE 700 1- Konor C. Department of Atmospheric Sciences, University of California, 90024, Los Angeles, CA, USA aut NATIONALLICENCE 773 0- Meteorology and Atmospheric Physics Springer-Verlag 50/1-3(1992-03-01), 31-45 0177-7971 50:1-3<31 1992 50 703 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer