Mechanisms of Climate Variability and Change

气候变率和变化的机制这项工作将研究气候变率和敏感性机制的季节内到年际的时间尺度。将利用观测和一系列模型研究大气层内产生的自然低频变率及其与海洋混合层的相互作用。还将研究热带季节内振荡及其与中纬度天气异常的相互作用。 动力学和热力学机制设置的热带季节内振荡的长时间尺度将使用NCAR CCM3 GCM的变化进行测试，这些将进行比较的观测分析。还将使用一系列模型研究云、辐射、SST和大气环流之间的相互作用以及对热带气候的影响。这项工作是重要的，因为在中纬度和热带地区的气候系统的动力学的改进的理解，从理论和实践的角度来看都有好处。

AbstractATM-9873691Hartmann, DennisUniversity of WashingtonTitle: Mechanisms of Climate Variability and ChangeThe proposed work will investigate climate variability and sensitivity mechanisms on intraseasonal to interannual time scales. The natural low-frequency variability generated within the atmosphere and its interaction with the oceanic mixed layer will be studied using observations as well as a hierarchy of models. The tropical intraseasonal oscillation and its interaction with midlatitude weather anomalies will also be investigated. Dynamic and thermodynamic mechanisms for setting the long time scale of the tropical intraseasonal oscillation will be tested using variations on the NCAR CCM3 GCM; these will be compared to the observational analysis. Interactions between clouds, radiation, SST and atmospheric circulation and the effect on tropical climate will also be investigated using a hierarchy of models. The work is important since an improved understanding of dynamics of the climate system in the middle latitudes and tropics has benefits both from a theoretical as well as practical point of view.