The atmosphere kinetic spectrum in the free troposphere and lower stratosphere exists a dependence of k -3 (k is the slope) on wavenumber for large scale(more than 800 km) system, while that is k -5/3 for mesoscale(less than 400 km)systems based on the observation data,which have been seen as a basic characteristic of free atmosphere. Whether the predicted results of model can display the slope turning characteristic of kinetic energy spectrum has been an effective method of model evaluation. In the article, the one and two dimensional kinetic energy spectrums of global GRAPES model were calculated based on the simulated results in May 2013, and the relations between the rotational and divergence components, stationary and transient components to the kinetic energy were analyzed. The results showed that the simulated one and two dimensional kinetic energy spectrums of GRAPES model could show the transition characteristic of the slope from large scale range to mesoscale range, however the absolute values of the slope in mesoscale range were obviously steeper than the observation and other models. The proportions of the rotational and divergent components, stationary and transient components in total kinetic energy spectrum and their changes with height were also consistent with the results of other articles. All in all, GRAPES could better reproduce the characteristics of the kinetic energy spectrum of real atmosphere, but was poor in description of the mesoscale fluctuation due to the effect of the resolution of model andatmospheric drag.

%U http://www.ghqx.org.cn/EN/10.11755/j.issn.1006-7639（2015）-02-0220