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The Sensitivity of the Nocturnal Minimum Temperature over Dry Terrain to Temperature and Humidity Changes Aloft
Publisher: American Meteorological Society
Abstract: The sensitivity of the nocturnal minimum temperature over dry soil under clear calm conditions to changes in the distribution of temperature and humidity aloft is estimated. To make the estimates, the minimum temperature ...
Hydrodynamic Instability of Small Eddies in a Tornado Vortex
Publisher: American Meteorological Society
Abstract: A numerical method is shown for solving problems of nonaxisymmetric perturbations in incompressible, inviscid, swirling flow for arbitrary undisturbed azimuthal and axial flows. Exclusive attention is given to the hydrodynamic ...
On the Wavelength of Maximum Baroclinic Instability
Publisher: American Meteorological Society
Abstract: A four-level quasigeostrophic model of a baroclinic atmosphere is used to examine the instability of short (?2000 km) baroclinic waves. It is determined that only a slight decrease in the low-level static stability or ...
Barotropic Instability in a Tornado Vortex
Publisher: American Meteorological Society
Abstract: The barotropic instability of a tornado described by Hoecker is investigated. It is found that wavenumbers of the order of 1 to 5 are significantly unstable, with growth rates of the order of 0.1 to 0.5 s?1, yielding ...
Gravity Waves Generated during Frontogenesis
Publisher: American Meteorological Society
Abstract: Gravity waves forced by nonhydrostatic and nongeostrophic processes within a frontal zone are discussed. In particular, stationary waves immediately above and below the surface front are considered. The waves that appear ...
On the Minimum Scale of Surface Fronts
Publisher: American Meteorological Society
Abstract: A series of numerical experiments of a surface front forced by stretching deformation using Clark's nonhydrostatic model at very high resolution is presented. These simulations are compared to those reported by Williams ...