Extratropical eddy distributions in four months typical of the four seasons are treated in terms of temporal mean and temporal r.m.s. values of the geostrophic relative vorticity.
The feasibility of using a photodiode radiometer to infer optical depth of thin clouds from solar intensity measurements was examined. Analysis of the case study results indicates that the photodiode radiometer can be used effectively to determine the optical depth of thin clouds.
Two basic experiments are shown: the first is a perturbation in the geopotential field, and the second is a perturbation in the rotational part of the wind field.
In this study, differences between narrowband near infrared (NIR) and infrared (IR) brightness temperatures are related to cloud optical depth providing a theoretical basis for determining cirrus optical properties from combined satellite images.
A generalization of the two-dimensional spectral forecast equations is suggested, whereby the atmospheric flow field in horizontal and vertical directions is represented in terms of orthogonal functions, which are eigenfunctions of certain differential operators in the three-dimensional equations. The technique is applied to the quasi-geostrophic potential vorticity equation.
An analytical study using a simplified form of the divergent barotropic vorticity equation was performed. The results show the importance of the change in the Coriolis parameter across the cyclone in determining cyclone motion.
