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

在全大气社区气候模式(WACCM)中加入了一个描述波传播、波-波相互作用和波-平均流相互作用的高空间分辨率谱元程序，以提高我们对气候变化及其在中层大气中的特征的理解。这种谱元素代码取代了传统的有限差分代码，传统的有限差分代码在计算效率(从而空间分辨率)方面受到限制，在小范围内非常不可靠。此外，WACCM中还嵌入了傅里叶射线跟踪代码，允许三维描述重力波的传播和由多个震源产生的重力波的相互作用。当这些代码嵌入到WACCM中时，它们提供了对中间大气的真实描述，包括内部重力波强迫，根据这些描述可以准确地分离气候响应。

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.