Idealized models can reveal insights into Earth's climate system by reducing its complexities. However, their potential is undermined by the scarcity of fully coupled idealized models with components comparable to contemporary, comprehensive Earth System Models. To fill this gap, we compare and contrast the climates of two idealized planets which build on the Simpler Models initiative of the Community Earth System Model (CESM). Using the fully coupled CESM, the Aqua configuration is ocean‐covered except for two polar land caps, and the Ridge configuration has an additional pole‐to‐pole grid‐cell‐wide continent. Contrary to most sea surface temperature profiles assumed for atmosphere‐only aquaplanet experiments with the thermal maximum on the equator, the coupled Aqua configuration is characterized by a global cold belt of wind‐driven equatorial upwelling, analogous to the eastern Pacific cold tongue. The presence of the meridional boundary on Ridge introduces zonal asymmetry in thermal and circulation features, similar to the contrast between western and eastern Pacific. This zonal asymmetry leads to a distinct climate state from Aqua, cooled by ∼2°C via the radiative feedback of clouds and water vapor. The meridional boundary of Ridge is also crucial for producing a more Earth‐like climate state compared to Aqua, including features of atmospheric and ocean circulation, the seasonal cycle of the Intertropical Convergence Zone, and the meridional heat transport. The mean climates of these two basic configurations provide a baseline for exploring other idealized ocean geometries, and their application for investigating various features and scale interactions in the coupled climate system.

中文翻译：

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社区地球系统模型中的水星和山脊行星耦合

理想化的模型可以通过降低地球复杂性来揭示对地球气候系统的见识。但是，由于缺乏可与当代全面地球系统模型相媲美的完全耦合的理想化模型，因此其潜力受到了削弱。为了填补这一空白，我们比较并对比了两个理想化行星的气候，这两个理想行星的基础是社区地球系统模型（CESM）的“简单模型”倡议。使用完全耦合的CESM，Aqua配置被海洋覆盖，除了两个极地台盖之外，Ridge配置具有一个额外的极点对极网格单元大洲。与仅在大气层进行的水上行星实验所假定的大多数海面温度曲线相反，赤道上的热量最大，耦合的Aqua构造的特征是，风驱动的赤道上升流形成了一个全球冷带，类似于东太平洋的冷舌。Ridge上子午线边界的存在在热力和环流特征方面引入了区域不对称性，类似于东西太平洋之间的对比。这种区域上的不对称性导致了与Aqua截然不同的气候状态，通过云和水蒸气的辐射反馈将其冷却至约2°C。与Aqua相比，Ridge的子午线边界对于产生更像地球的气候状态也至关重要，包括大气和海洋环流，热带辐合带的季节周期以及子午热传输。这两种基本配置的平均气候为探索其他理想的海洋几何形状提供了基准，