Cellular modelling and geochemical analyses reveal that a dominant group of phytoplankton changed their carbonate production as atmospheric CO2 levels declined from peak levels in the warm early Eocene, hinting at a positive feedback in the global carbon cycle.

中文翻译：

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用球石藻循环碳

细胞模型和地球化学分析表明，随着大气二氧化碳水平从温暖的始新世早期峰值水平下降，占主导地位的浮游植物群改变了它们的碳酸盐产量，这暗示了全球碳循环的正反馈。