Fronts and frontogenesis in relation to vorticity
MetadataShow full item record
Soon after the discovery of the polar front, it was realized that fronts were subject to processes which either increased or diminished their intensity. Thus, fronts may form in fields where the distributiori of the meteorological elements is continuous; and, in other cases, fronts may dissolve and develop into a field of continuous distribution of the various elements. The processes which lead to the formation of a front or the increase in intensity of an existing front, are called jrontogenetical processes; and the processes which lead to the dissolution of fronts are calledjrontolytical processes. In theoretical treatments of fronts it has been customary to simplify the problem by assuming that a frontal surface is a mathematical discontinuity, and doubts have been raised against the validity of this simplification. Petterssen has shown that both the dynamic and the kinematic boundary conditions that hold for perfect discontinuities hold also for layers of transition of finite thickness within which the meteorological elements vary continuously. We are, therefore, justified in treating frontal surfaces and fronts as either strict discontinuities or as finite layers of transition. Frontogenesis may therefore be defined as the process that tends to create a surface of discontinuity in the atmosphere. Whether or not this process results in a strict discontinuity is immaterial.
Showing items related by title, author, creator and subject.
Forsyth, Donald W. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1973-09)The dispersion of Love and Rayleigh waves in the period range 17-167 sec. is used to detect the change in the structure of the upper mantle as the age of the sea-floor increases away from the mid-ocean ridge. Using the ...
Rapo, Mark A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2006-02)The challenge of estimating the Reynolds stress in an energetic ocean environment derives from the turbulence process overlapping in frequency, or in wavenumber, with the wave process. It was surmised that they would not ...
Echolocation-based foraging by harbor porpoises and sperm whales, including effects of noise and acoustic propagation DeRuiter, Stacy L. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2008-09)In this thesis, I provide quantitative descriptions of toothed whale echolocation and foraging behavior, including assessment of the effects of noise on foraging behavior and the potential influence of ocean acoustic ...