On the Structure of Thermals

Authors

  • D. Konovalov Main Geophysical Observatory, Leningrad, USSR

Keywords:

Meteorology, Atmospheric physics

Abstract

The article discusses the structure of thermals as revealed by experiments in the atmosphere. Two basic types of thermals were discovered, one with a single core of maximum vertical velocity and one with several cores. Averaged, dimensionless cross sections are plotted. Turbulent characteristics of the two types are discussed and the frequency of maximal velocities and dimensions derived. It is shown that the frequency of thermal types is related to the vertical gradient of air temperature in the lowest 300 m.

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Issue

Vol. 29 No. 4 (2005)

Section

Articles

License

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