Workshop: Energy spectra and vertical velocity of the Earth's atmosphere

ECMWF | Reading | 27 June 2019

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Workshop description

Improving the ability of existing General Circulation Models (GCMs) to simulate a realistic k–5/3 wave number energy spectrum at atmospheric mesoscales is a recurring theme in the development of dynamical cores for the atmospheric circulation. Why do successful models of the atmosphere not necessarily exhibit the observed transition from k–3 to k–5/3 ? How does this relate to error growth in predictions ? How does vertical velocity relate to the energy redistribution of horizontal kinetic energy ? How does this change as global circulation models start to explicitly simulate convection ? These and other intriguing questions were discussed in this mini-workshop. The latest theoretical developments in understanding energy spectra in the atmosphere and their emergence in observed and modelled spectra, and comparisons with aircraft data and other observations of vertical velocity with results from km-scale simulations were reviewed.



Introduction & Welcome

Nils Wedi (ECMWF)


 The Nastrom-Gage spectrum in the atmosphere - a review"


Erik Lindborg (KTH, Sweden)


Coffee break



Vertical velocity spectra near the tropopause from measurements and models 


Ulrich Schumann (DLR, Germany)


Transient Tropopause Waves

Andreas Doernbrack (DLR, Germany)


Discussion and close