A Coupled Model of the Effects of Planetary Waves on the Zonally Averaged State of the Middle Atmosphere

根据这份合同，首席研究员将把两个现有的模型结合起来：一个是平流层的准地转时变波模型，另一个是中层大气的纬向平均（二维）化学辐射动力学模型。通过两者的耦合，希望能更好地表征平流层的大尺度结构和波-平均流相互作用，从而对中层大气中微量化学物质的输运和平均分布提供更现实的估计。此外，该研究可能为如何在二维化学模型中最好地参数化一些行星波和涡效应提供线索。三维模型的复杂性和巨大的计算需求使得用更简单的二维模型进行某些研究的选择非常有吸引力。这个项目有潜力改进现有二维模型中波浪相互作用的粗糙参数化。

Under this award, the principal investigator will couple two existing models: a quasi-geostrophic time-dependent wave model of the stratosphere with a zonally averaged (two- dimensional) chemical-radiative-dynamical model of the middle atmosphere. By coupling the two, it is hoped that the better representation of the large-scale structure and wave-mean flow interaction in the stratosphere will provide more realistic estimates of transport and the mean distribution of trace chemical species in the middle atmosphere. Further, the study may provide clues as to how best to parameterize some of the planetary wave and eddy effects in the two-dimensional chemical model. The complexity and vast computational requirements of three-dimensional models makes the option of conducting certain studies with simpler two-dimensional models very attractive. This project has the potential to improve the (now) crude parameterizations of wave interactions in existing two- dimensional models.