The Role of Eddies in Climate

两个不同的双层模型将被用来研究涡旋在决定气候和气候敏感性方面的作用。一种是传统的准地转模式，另一种是Lorenz(1960b)提出的允许涡旋与静力稳定性相互作用的两层模式。由牛顿冷却参数化的差热将强迫环流。在下边界，耗散将以埃克曼吸力的形式出现。最初将省略地形，但将在以后添加。模式的水平分辨率不受先验条件的限制，但前人的研究表明，在相对较低的截断条件下，可以较准确地模拟涡通量。这项研究将不同于其他使用低阶模式的气候研究，因为它包括了与经向动量涡流和垂直热涡通量相关的涡流-平均流相互作用，并且因为它侧重于这些相互作用如何受到非绝热和耗散的影响。研究结果应提供对了解气候和气候敏感性至关重要的信息，以及在更简单的气候模式中对涡旋影响进行参数化的有价值的信息。

Two different two-layer models will be used to investigate the role of eddies in determining climate and climate sensitivity. One model will be a conventional quasi-geostrophic model, and the other will be the two-layer model proposed by Lorenz (1960b) which allows the eddies to interact with the static stability. The circulations will be forced by differential heating parameterized by Newtonian cooling. Dissipation will be in the form of Ekman suction at the lower boundary. Initially topography will be omitted, but it will be added at a later date. The models' horizontal resolution will not be constrained a priori, but previous studies indicate that the eddy fluxes can be simulated accurately with relatively low truncation. The study will differ from other climate studies with low-order models because of the inclusion of the eddy-mean flow interactions associated with the meridional eddy flux of momentum and with the vertical eddy flux of heat, and because of its focus on how the interactions are affected by diabaticity and dissipation. The results of the study should yield information of fundamental importance for understanding climate and climate sensitivity, and information of value for parameterizing the effects of eddies in simpler climate models.