Low-frequency Dynamics of the Atmosphere and Climate Models Using Angular Momentum Diagnostics

大气角动量(AAM)是大气纬向平均动力学的一个可靠和方便的指标；在气候时间尺度上，在观测和模式中，对AAM及其伴随的纬向平均风场u的行为的诊断研究继续引起广泛的兴趣和相关性。PI建议使用各种GCM的输出继续进行AAM诊断。主题是：(I)AMIP2模拟中AAM的季节和年际变化；(Ii)模拟AAM的年代际变化；(Iii)“双CO2”实验。这项工作很重要，因为它将增加对AAM在气候系统中作用的理解。

The Atmospheric Angular Momentum (AAM) is a robust and convenient index of the atmosphere's zonal-mean dynamics; diagnostic studies of the behavior of AAM and its attendant zonal-mean zonal wind field u, on climate time scales, in both observations and models, continue to be of widespread interest and relevance. The PIs propose to continue AAM diagnostics using output from various GCMs. The topics are (i) seasonal and interannual variability of AAM in the AMIP2 simulations; (ii) multidecadal variability of simulated AAM (iii) 'Double CO2' experiments. The work is important because it will increase understanding of the role of AAM in the climate system.