Abstract: The ?parcel? method of treating dynamic instability is extended to the case of an arbitrary flow pattern. The criteria for instability become relatively complex and depend on the three-dimensional gradients of temperature ...

Abstract: The subsequent motion of a perturbed air-parcel is outlined, together with the criteria that determine the four fundamental types of dynamically stable and dynamically unstable motions. The specification of such motions ...

Abstract: A basic problem in atmospheric radiation is the computation of flux transmission (hemispheric radiation) for a narrow interval of the water-vapor spectrum. Individual lines are spaced more or less at random and have widely ...

Abstract: From a consideration of temperature changes in isobaric surfaces a new pressure-tendency equation is derived which is applicable to mass changes of a layer or pressure changes at any level including the earth's surface. ...

Abstract: The existence of an Arctic stratospheric jet stream in winter, hitherto largely inferred from mean geostrophic wind sections, is considered on the basis of actual winds for the Canadian Arctic area during the winter of ...