Modal view of atmospheric circulation

representation of  the atmosphere

MODES focuses on the representation of the inertio-gravity circulation in numerical weather prediction models, reanalyses, ensemble prediction systems and climate simulations. The project methodology relies on the decomposition of global circulation in terms of 3D orthogonal normal-mode functions. It allows quantification of the role of inertio-gravity waves in atmospheric varibility across the whole spectrum of resolved spatial and temporal scales.

More about MODES

Modal decomposition of ECMWF deterministic forecasts


Atmospheric energy spectra

Distribution of atmospheric balanced and inertio-gravity energy as a function of the zonal wavenumber.

Circulation maps

Horizontal circulation maps of the Northern and Southeren Hemisphere and the Tropics.

Equatorial cross-sections

Longitude-altitude diagram of the tropical zonal winds associated with the balanced and inertio-gravity circulation and the equatorial Kelvin wave.

Hovmöller diagrams

Ten-day evolution of the tropical winds on selected levels.

Kelvin wave energetics

Evolution of the Kelvin wave in the ECMWF model forecast and comparison with analyses.

Polar maps

Polar maps of horizontal winds in the Northern Hemisphere (40°N-90°N)