能量串级是大气中尺度能量谱动力学机理研究的核心问题之一，其体现了大气中尺度运动的非线性本质。目前为止，关于大气中尺度范围上能量串级到底是升尺度的还是降尺度的，或者是两者共存，还没有明确的科学定论。以往基于湍流惯性理论假设的研究忽略了大气中尺度上丰富的物理强迫过程，尤其是与湿物理过程相关的潜热加热和重力惯性波的垂直传播。本项目基于有限区域非静力模式WRF和全球非静力模式MPAS，采用理论推导和数值研究相结合的方法，从涡旋动能和辐散动能谱收支的角度，通过定量诊断高分辨率理想斜压波数值模拟结果，研究非静力湿大气的中尺度能量串级特征，重点揭示湿物理过程对大气中尺度能量串级的影响以及可能的物理机制。项目研究结果能够加深对大气中尺度能量谱动力学机理的认识，为揭示中尺度湿对流系统发展机理提供重要参考。

Energy cascade lies at the core of the dynamics producing the mesoscale energy spectra in the atmosphere and embodies the nature of nonlinear scale interactions. Until now, it is remarkable that no scientific consensus yet has been reached on the important issue whether the energy cascade through the mesoscale atmosphere is upscale or downscale, or both. Previous studies based on the inertial turbulence theories overlook the important fact that there exist abundant physical forcing processes in the mesoscale atmosphere, especially moist physical processes that will release latent heat and excite vertically propagating inertia–gravity waves. With the regional nonhydrostatic model WRF (the Weather Research and Forecast model) and the global nonhydrostatic model MPAS (the Model for Prediction Across Scales), mesoscale energy cascade of moist nonhydrostatic atmosphere is investigated from the point view of spectral budgets of rotational and divergent kinetic energy by quantitatively diagnosing the outputs of high-resolution idealized baroclinic wave simulations, especially for the effect of moist physical processes on energy cascade through the mesoscale and its possible mechanism. This study is expected to improve the understanding of the dynamics producing the mesoscale energy spectra in the atmosphere, and provide important contribution for exploring the development mechanism of moist convective systems.