Abstract: A canonical correlation analysis is used to study the optimal relationship between low-frequency variations of the 500 mb height and the barotropic feedback effect in terms of cyclone-scale eddy-induced height tendencies. ...

Abstract: Nine winters of Northern Hemisphere observations are used for a statistical analysis of the relation between the mountain forcing of the zonally-averaged barotropic wind and blocking. Thereby, the temporal variability of ...

Abstract: Recently, it has been shown that the EOFs (empirical orthogonal functions) of the solutions of a stationary linear model to an ensemble of white noise forcing fields are the Schmidt modes (singular modes) of the model' ...

Abstract: This paper is concerned with the forcing of the low-frequency variability (10 days up to 3 months) of the barotropic planetary waves (wavenumbers 1 to 4) for wintertime conditions in the Northern Hemisphere. In particular, ...

Abstract: The forcing of Northern Hemisphere blocking highs by the transient vorticity transfer from the cyclone-scale eddies into the planetary flow is investigated. Thereby, a barotropic prediction model for the planetary modes ...

Abstract: Canonical correlation analysis is applied to investigate the relationship between the low-pass filtered (barotropic) streamfunction and the effects of cyclone-scale eddies. The eddy effects are evaluated in terms of flux ...

Abstract: Linear baroclinic instability theory is used to investigate the subweekly time scale transient eddies (TEs) and their feedbacks associated with three-dimensional basic flows on the Northern Hemisphere, in terms of a two-layer ...

Abstract: The linear baroclinic instability of three-dimensional basic flows on the Northern Hemisphere is examined in terms of a simple two-level, quasi-geostrophic model. The basic flows considered comprise an observed six-winter ...