Journal of Meteorology · 1948 · 63 citations · 0 references
Natural SciencesEarth SciencesMeteorologyAtmospheric ScienceClimatologyTropical MeteorologyJet StreamsPlanetary Boundary LayerPolar ClimatologyPolar MeteorologyAbsolute VorticityAnticyclonic VorticityAverage Cross SectionsLow-level VorticityPolar Front Jet StreamPolar Jet StreamsTropopause DynamicsTropopause Height
A mean cross section is constructed from a number of individually analyzed daily cross sections, using the frontal layer as a reference for the coordinates. This preserves the thermal gradients observed in the individual cases, and minimizes the effect of observational errors. Computed wind velocity, wind shear, and vorticity patterns are discussed, particularly with regard to the strong anticyclonic shear and low absolute vorticity found to the south of the jet stream near the tropopause level.