On the interaction of tropical-cyclone-scale vortices. II: discrete vortex patches

Elizabeth A Ritchie, G. J. Holland

Research output: Chapter in Book/Report/Conference proceedingChapter

80 Citations (Scopus)

Abstract

It is found that the initial approach of compound vortices, such as tropical cyclones, arises from distortion of their, weaker, outer vorticity fields. For similar vortices, the initial interaction consists of mutual orbit and approach with only minor fluctuations in shape. Once the vortices approach to within a critical separation distance, rapid merger occurs. A simplified expression for this critical distance is derived and it indicates that binary tropical cyclones must approach to within 150-300 km before merger of the cores can occur. When vortices have substantial differences in size or intensity, the smaller/weaker system shears into the outer circulation of the other and no core merger occurs. It is suggested that this is typical of the interaction between tropical cyclones and both the monsoon trough and embedded mesoscale convective complexes. The motion of interacting vortices consists largely of a mutual orbit, which scales according to their relative sizes and intensities. An important finding, however, is that higher-frequency meanders may develop. -from Authors

Original languageEnglish (US)
Title of host publicationQuarterly Journal - Royal Meteorological Society
Pages1363-1379
Number of pages17
Volume119
Edition514
StatePublished - 1993
Externally publishedYes

Fingerprint

tropical cyclone
vortex
merger
meander
vorticity
trough
monsoon

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Environmental Science(all)

Cite this

Ritchie, E. A., & Holland, G. J. (1993). On the interaction of tropical-cyclone-scale vortices. II: discrete vortex patches. In Quarterly Journal - Royal Meteorological Society (514 ed., Vol. 119, pp. 1363-1379)

On the interaction of tropical-cyclone-scale vortices. II : discrete vortex patches. / Ritchie, Elizabeth A; Holland, G. J.

Quarterly Journal - Royal Meteorological Society. Vol. 119 514. ed. 1993. p. 1363-1379.

Research output: Chapter in Book/Report/Conference proceedingChapter

Ritchie, EA & Holland, GJ 1993, On the interaction of tropical-cyclone-scale vortices. II: discrete vortex patches. in Quarterly Journal - Royal Meteorological Society. 514 edn, vol. 119, pp. 1363-1379.
Ritchie EA, Holland GJ. On the interaction of tropical-cyclone-scale vortices. II: discrete vortex patches. In Quarterly Journal - Royal Meteorological Society. 514 ed. Vol. 119. 1993. p. 1363-1379
Ritchie, Elizabeth A ; Holland, G. J. / On the interaction of tropical-cyclone-scale vortices. II : discrete vortex patches. Quarterly Journal - Royal Meteorological Society. Vol. 119 514. ed. 1993. pp. 1363-1379
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