Development and Applications of Embedded Spectral-Element and Fourier-Ray Codes for High-Resolution Dynamics Studies within Whole Atmosphere Community Climate Model (WACCM)

在全大气群落气候模式（WACCM）中引入了描述波传播、波-波相互作用和波-平均流相互作用的高空间分辨率谱元代码，以提高我们对大气中层气候变化及其特征的认识。这种谱元编码取代了传统的有限差分编码，后者在计算效率（以及空间分辨率）上受到限制，而且在小尺度上非常不可靠。此外，在WACCM中还嵌入了傅里叶射线追踪代码，允许对重力波传播和多源产生的重力波相互作用进行三维描述。当嵌入WACCM时，这些代码提供了对中层大气的真实描述，包括内部重力波强迫，可以准确地隔离气候响应。

A high spatial-resolution spectral-element code, describing wave propagation, wave-wave interactions, and wave-mean flow interactions is incorporated into the Whole Atmosphere Community Climate Model (WACCM) for the purpose of improving our understanding of climate change and its signature in the middle atmosphere. This spectral-element code replaces traditional finite difference codes, which are limited in computational efficiency (and thus spatial resolution), and are very unreliable at small scale. In addition, a Fourier ray-tracing code is also imbedded within WACCM, permitting three-dimensional description of gravity wave propagation and the interaction of gravity waves generated by multiple sources. These codes, when embedded in WACCM, provide a realistic description of the middle atmosphere, including internal gravity wave forcing, against which climate response can be accurately isolated.