Brief communication: Enhanced representation of the power spectra of wind speed in Convection-Permitting Models

Abstract. The accurate representation of the power spectra of wind speed is crucial for assessing extreme wind speeds, but numerical models often suffer from premature energy loss at high frequencies. Here, we show that Convection-Permitting Models from the CORDEX-FPS can reproduce the theoretical -5/3 slope of the 100 m wind speed power spectra in the high frequency range, contrary to other mesoscale simulations used by the wind community (NEWA and ERA5), which exhibit steepened spectral slopes. This superior energy cascade representation is essential for extreme wind estimation and eliminates the need for spectral corrections, opening opportunities for improved wind farm design and more reliable energy transition planning.