Satellite climatological aspects of the ' polar low' and ' instant occlusion' ( Pacific, Atlantic).

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Abstract

Middle resolution DMSP (Defense Meteorological Satellite Program) visible and infrared imagery are analyzed in conjunction with surface and upper-air synoptic observations for two years' (1977, 1978-79) mid-season months (January, April, July, October) to derive synoptic climatological information on the 'polar low' and 'instant occlusion' phenomena. Polar-air vortices occur most frequently over the oceans in winter. Regional differences in the dominance of cloud signature sub-types confirm variations in the dynamics involved in polar-air cyclogenesis, as noted by previous workers. The 'common cloud' appears to occur more frequently in the North Pacific, while the spiraliform vortex predominates in the North Atlantic.-Author

Original languageEnglish (US)
Pages (from-to)433-450
Number of pages18
JournalTellus, Series A
Volume37 A
Issue number5
Publication statusPublished - Jan 1 1985

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All Science Journal Classification (ASJC) codes

  • Oceanography
  • Atmospheric Science

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