论文标题
全球气候对大陆几何形状的敏感依赖性
Sensitive Dependence of Global Climate to Continental Geometry
论文作者
论文摘要
在数十亿年的历史中，地球经历了广泛的气候。长期气候受大气二氧化碳浓度控制，二氧化碳浓度受海洋隔离通过化学风化来调节。这个化学风化的水槽与大陆的分布和组成密切相关。但是，在一般框架内从未研究过大陆分布的效果。在这里，我们表明，全球风化速率对大陆的规模和形状敏感，但对热带地区的土地数量并没有很好地解释。我们构建合成的大陆构型，并使用全球气候模型模拟集合来隔离大陆排列对风化和碳埋葬的预期影响。径流模式很复杂，对大陆几何形状的详细特征敏感，并且通过大陆延伸的预测不佳。这些结果有助于解释地球气候的长期变异性和不规则性。
Over its multibillion-year history, the Earth has experienced a wide range of climates. The long-term climate is controlled by the atmospheric carbon dioxide concentration, which is regulated by marine sequestration through chemical weathering. This chemical weathering sink is strongly linked to the distribution and composition of the continents. However, the effect of continental distribution has never been studied within a general framework. Here we show that the global weathering rate is sensitive to the size and shape of the continents, but is not well explained by the amount of land in the tropics. We construct synthetic continental configurations and use an ensemble of global climate model simulations to isolate the expected effect of continental arrangement on weathering and carbon burial. Runoff patterns are complex, sensitive to detailed features of continental geometry, and poorly predicted by continental latitude. These results help explain the long-term variability and irregularity of Earth's climate.
