The Singular-Vector Structure of the Atmospheric Global Circulation

摘要: Abstract The local phase-space instability Of the atmospheric global circulation is Characterized by its (nonmodal) singular vectors. formalism of vector analysis described. relations between vectors, normal modes, adjoint Lyapunov perturbations produced so-called breeding method, and wave pseudomomentum are outlined. Techniques to estimate dominant part spectrum using large-dimensional primitive equation models discussed. These include use forward tangent propagators with a Lanczos iterative algorithm. Results described, based first on statistics routine calculations made December 1992 August 1993, second three specific case studies. define geographical areas in Northern Hemisphere: two regions storm track cyclogenesis, North African subtropical jet Singular vectors can amplify as much tenfold over 36 hours, winter ther...