caa a22 4500 469084413 CHVBK 20180323133000.0 cr unu---uuuuu 170328e19920901xx s 000 0 eng 10.1007/BF02656941 doi (NATIONALLICENCE)springer-10.1007/BF02656941 McHall Y. Dept. of Meteorology, University of Edinburgh, EH9 3JZ, UK aut Wintertime stratospheric anomalies— Part II: Sudden warmings [Elektronische Daten] [Y. McHall] The process of stratospheric sudden warmings from development of planetary waves to the sudden cooling after reversal of mean zonal circulation will be studied with the primitive equations of heat and momentum balances. It will be explained that the sudden warmings may occur only in the polar regions of winter stratosphere where zonal mean temperature decreases poleward. The heating rate in the order of major warmings is produced by developed planetary waves in the stratospheric breaking layers. The particular perturbation structure characterized by large amplitude of wave 1 together with minimum of wave 2 discovered by Labitzke (1977) is crucial for initiation of major warmings. The cooling by the same mechanism can be produced in the regions with reversed mean temperature gradient. Advances in Atmospheric Sciences, 1992 Advances in Atmospheric Sciences Springer-Verlag 9/3(1992-09-01), 311-322 0256-1530 9:3<311 1992 9 376 https://doi.org/10.1007/BF02656941 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02656941 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- McHall Y. Dept. of Meteorology, University of Edinburgh, EH9 3JZ, UK aut NATIONALLICENCE 773 0- Advances in Atmospheric Sciences Springer-Verlag 9/3(1992-09-01), 311-322 0256-1530 9:3<311 1992 9 376 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer