Abstract

The paper describes a dynamical (geometrical) model of gravity-wave-induced noctilucent cloud (NLC) brightness. NLC brightness dependences on gravity wave parameters are presented. Results of the inverse-problem solution are addressed as well. It is shown that relative variations of NLC brightness are mainly dependent on the amplitude of a gravity wave, its horizontal wavelength and unperturbed thickness of an NLC layer. It is also shown that the model can be used for determining a geometric amplitude of a perturbing wave from a relative brightness distribution (inverse problem) and that the uncertainty of the geometric wave amplitude is mainly defined by an uncertainty of the cloud layer thickness.

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