In Part 2 of this two‐part paper, documentation is provided of key aspects of a version of the AM4.0/LM4.0 atmosphere/land model that will serve as a base for a new set of climate and Earth system models (CM4 and ESM4) under development at NOAA's Geophysical Fluid Dynamics Laboratory (GFDL). The quality of the simulation in AMIP (Atmospheric Model Intercomparison Project) mode has been provided in Part 1. Part 2 provides documentation of key components and some sensitivities to choices of model formulation and values of parameters, highlighting the convection parameterization and orographic gravity wave drag. The approach taken to tune the model's clouds to observations is a particular focal point. Care is taken to describe the extent to which aerosol effective forcing and Cess sensitivity have been tuned through the model development process, both of which are relevant to the ability of the model to simulate the evolution of temperatures over the last century when coupled to an ocean model.

中文翻译：

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GFDL全球大气和土地模型AM4.0 / LM4.0：2.模型描述，敏感性研究和调整策略

在这个由两部分组成的论文的第2部分中，提供了有关AM4.0 / LM4.0大气/土地模型版本的关键方面的文档，该模型将作为一组新的气候和地球系统模型（CM4）的基础。和ESM4）正在由NOAA的地球物理流体动力学实验室（GFDL）开发。第1部分提供了AMIP（大气模型比较项目）模式下的仿真质量。第2部分提供了关键组件的文档以及对模型公式和参数值的选择的一些敏感性，着重介绍了对流参数化和地形重力波拖曳。将模型的云调整为观测值的方法是一个特别的重点。