Abstract: Various positive and negative ionic processes of importance in controlling the electron density in the lower ionosphere are discussed. In particular, models of the effective dissociative recombination coefficient based on ...

Abstract: The application of the WKB method to internal gravity waves in a compressible fluid with wind shear is studied from the standpoint of dispersion and of the validity of the method. It is shown that at resonance (the level ...

Abstract: Nitric oxide and ozone concentrations have been measured in situ from a high-altitude research aircraft based at the NASA Ames Research Center. Data which show the variations of NO and 03 with the time of year are presented ...

Abstract: Free chlorine atoms produced from HCl deposited by solid-fueled rocket engines react to destroy odd oxygen in the stratosphere. Using a one-dimensional photochemical model, we have computed the reduction of ozone likely ...

Abstract: We have developed a time-dependent one-dimensional model of the stratospheric sulfate aerosol layer. In constructing the model, we have incorporated a wide range of basic physical and chemical processes in order to avoid ...

Abstract: We have performed sensitivity tests on a one-dimensional physical-chemical model of the unperturbed stratospheric aerosols and have compared model calculations with observations. The sensitivity tests and comparisons with ...

Abstract: A two-dimensional model is used to predict the 1990 reduction in ozone due to the chlorine compounds formed by chlorofluoromethane (CFM) photolysis when the CFM release rate is held constant at the 1975 value. The predicted ...

Abstract: We have estimated the potential effects on stratospheric aerosols of supersonic transport emissions of sulfur dioxide gas and submicron soot granules, and space shuttle rocket emissions of aluminum oxide particulates. ...