COMPARATIVE PHYSICAL BEHAVIOR OF SOUTHERLY BOUNDARY-LAYER WIND JETS

Abstract

Wind data from the central five stations of the 1961 Weather Bureau boundary-layer-jet research pibal line are space-averaged as point data. In this form the information is compatible with other boundary-layer wind analyses made from composites of several points. Particular attention is paid to diurnal changes of jet speed, to Richardson numbers, and to inertial oscillations. Comparisons relative to the above items are made with two serial-data jet systems, as well as with theoretical models, and some similarities are found. Relationships among the jet, the geostrophic wind, and thermal wind are shown. The hodograph patterns for a jet with a surface inversion differ markedly from a jet imbedded in a temperature lapse. A certain combination of currently forecastable meteorological variables seems to be optimal for the development of the jet after sunset.