. Compendium of meteorology. Meteorology. Fig. 5.—Soundings at selected stations during the near- approach or arrival of a hurricane center. (®—height of tropopause; H—top of sounding, tropopause not reached.) (Hurricane Notes—Weather Bureau Training Paper No. 1, Washington, D. C, July 1948.) Some attempt was made in the middle 1930's to apply Norwegian methods to tropical analysis. Hur- ricanes were supposed to develop on the equatorial front which at that time had several different defini- 60,0001 40,000! Cv \^^ CORE OUTER VORTEX \ ^^ 20, Fig. 6.—Probable relation between temperature in
. Compendium of meteorology. Meteorology. Fig. 5.—Soundings at selected stations during the near- approach or arrival of a hurricane center. (®—height of tropopause; H—top of sounding, tropopause not reached.) (Hurricane Notes—Weather Bureau Training Paper No. 1, Washington, D. C, July 1948.) Some attempt was made in the middle 1930's to apply Norwegian methods to tropical analysis. Hur- ricanes were supposed to develop on the equatorial front which at that time had several different defini- 60,0001 40,000! Cv \^^ CORE OUTER VORTEX \ ^^ 20, Fig. 6.—Probable relation between temperature in the outer and inner vortex of a mature hurricane. (After B. H. Simpson.) tions but which now is considered as a narrow zone, usually associated with the equatorial trough, in which air is undergoing horizontal convergence. However, there are no significant temperature differences along the equatorial front, there is no density discontinuity, and the air is essentially homogeneous. Tropical cyclones originate in easterly waves, in the intertropical convergence zone, and occasionally in the trailing southerly portions of old polar troughs. Cer-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original American Meteorological Society. Committee on the Compendium of Meteorology; Malone, Thomas F. Boston : American Meteorological Society
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