caa a22 4500 469052317 CHVBK 20180323132833.0 cr unu---uuuuu 170328e19920301xx s 000 0 eng 10.1007/BF01029560 doi (NATIONALLICENCE)springer-10.1007/BF01029560 Kurz M. Zentralamt Offenbach, Deutscher Wetterdienst, Frankfurter Straße 135, D-W-6050, Offenbach (M), Germany aut Synoptic diagnosis of frontogenetic and cyclogenetic processes [Elektronische Daten] [M. Kurz] Summary: In the paper it is shown that theQ-vector defined by Hoskins et al. is a suitable aid for the diagnosis of frontogenetic and cyclogenetic processes. It allows a direct estimation of frontogenetic (or frontolytic) effects within the geostrophic wind field and of the macro-scale forcing of vertical motions. A partitioning of the forcing is possible into one part depending on divergences along the frontal zone and working in short baroclinic waves, and another part connected with frontogenesis (or frontolysis) and causing circulatory motions around the frontal zone. Thus the intercorrelation between both processes can be easily studied. With the described cases it is demonstrated that frontogenetic circulations often lead to the first stages of cyclogenesis but that a further forcing of ascent predominantly ahead of an upper trough is necessary for a deepening of the low. Also during the mature and occlusion stage of cyclogenesis and within the "downstream development” of baroclinic waves frontogenetic (or frontolytic) circulations play an important role in the regime of vertical motions. Springer-Verlag, 1992 Meteorology and Atmospheric Physics Springer-Verlag 48/1-4(1992-03-01), 77-91 0177-7971 48:1-4<77 1992 48 703 https://doi.org/10.1007/BF01029560 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01029560 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Kurz M. Zentralamt Offenbach, Deutscher Wetterdienst, Frankfurter Straße 135, D-W-6050, Offenbach (M), Germany aut NATIONALLICENCE 773 0- Meteorology and Atmospheric Physics Springer-Verlag 48/1-4(1992-03-01), 77-91 0177-7971 48:1-4<77 1992 48 703 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer