Abstract: Predictability is deduced from phase space trajectories of weather and climate variables which evolve on attractors (local surface pressure and a δ 18O-record). Predictability can be defined by the divergence of initially ...

Abstract: A parsimonious model is presented, leading to Schreiber?s aridity?runoff relation as equilibrium solution of the rainfall?runoff chain. The chain commences with a fast stochastic water reservoir of small capacity, representing ...

Abstract: The dimensions of attractors are estimated from phase space trajectories of observed weather and climate variables (local surface pressure and relative sunshine duration, zonal wave amplitude; a δ18O-record). They provide ...

Abstract: A parameterization scheme for cumulus convection is derived by averaging the conservative quantities, total energy and Ertel?s Wirbelinvariante, separately over the cloud and cloud-free areas and the lifetime of the ...

Abstract: A parametric model of an individual transient cumulus cloud is derived which allows the incorporation of direct cloud observations. An ensemble of these transient cumulus clouds is constructed using empirical cloud population ...

Abstract: Predictability time scales are estimated from annual time series of the El Niño/Southern Oscillation (ENSO). They we defined by the rate of divergence of initially close independent pieces of trajectories in phase space. ...

Abstract: A parametric model of a transient cumulus cloud with the related cloud population is introduced. A closure condition is presented which couples the statistical, physical and geometrical parameters of the cloud ensemble ...

Abstract: Unfiltered, band- and low-pass filtered geopotential height values of the 500 mb level along 50°S are analyzed to evaluate teleconnections and zonal wave-propagation properties in the Southern Hemisphere (SH) midlatitudes. ...

Abstract: A space-time spectral analysis is applied to the daily 500 mb geopotential field (gridded along 50° N) of five winter seasons (1972?77). The results are displayed in the wavenumber-frequency domain as two-sided frequency ...

Abstract: The linear combination of two statistical forecast schemes of a single observable provides, in the average, a more accurate prediction than the individual forecasts alone. This method is applied to long-range forecasting ...