The response of the ventilation of mode and intermediate waters to abrupt changes in the Southern Annular Mode (SAM) is examined by analyzing the ideal age in a global ocean‐sea ice model. The age response is shown to differ between the central Pacific Ocean and other basins. In the central Pacific there are large decreases in the age of subtropical mode and intermediate waters associated with a more positive SAM, contrasting only small age changes in the Atlantic and Indian Oceans, except near where intermediate water density surfaces outcrop. These interbasin differences hold for simulations at different horizontal resolutions, and can be explained by the zonal variations in wind stress changes associated with the SAM. These results suggest that the carbon and heat uptake associated with the SAM will likely vary between ocean basins.

中文翻译：

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南环形模式变化对海洋通风的跨流域差异

通过分析全球海洋-海冰模型的理想年龄，研究了模式水和中间水的通气对南部环形模式（SAM）突变的响应。年龄响应在太平洋中部和其他盆地之间表现出差异。在太平洋中部，亚热带模式和中间水域的年龄大大减少，而SAM则更为阳性，而大西洋和印度洋的年龄变化很小，相反，中间水密度表面露头的地区除外。这些流域间差异适用于在不同水平分辨率下进行的模拟，并且可以通过与SAM相关的风应力变化的区域变化来解释。这些结果表明，与SAM相关的碳和热量吸收可能会在不同海盆之间发生变化。