Few global syntheses of oxygen and carbon isotope composition of pedogenic carbonates have been attempted, unlike marine carbonates. Pedogenic carbonates represent in-situ indicators of the climate conditions prevailing on land. The δ¹⁸O and δ¹³C values of pedogenic carbonates are controlled by local and global factors, many of them not affecting the marine carbonates largely used to probe global climate changes. We compile pedogenic oxygen and carbon isotopic data (N= 12,167) from Cretaceous to Quaternary-aged paleosols to identify potential trends through time and tie them to possible controlling factors. While discrete events such as the Paleocene-Eocene Thermal Maximum are clearly evidenced, our analysis reveals an increasing complexity in the distribution of the δ¹⁸O vs δ¹³C values through the Cenozoic. As could be expected, the rise of C₄ plants induces a shift towards higher δ¹³C values during the Neogene and Quaternary. We also show that the increase in global hypsometry during the Neogene plays a major role in controlling the δ¹⁸O and δ¹³C values of pedogenic carbonates by increasing aridity downwind of orographic barriers. Finally, during the Quaternary, an increase of 3‰ in δ¹⁸O values is recorded both by the pedogenic carbonates and the marine foraminifera suggesting that both indicators may be used to track global climate signal.

不同于海洋碳酸盐，很少有人尝试进行全球性的成岩碳酸盐的氧和碳同位素组成的合成。成岩碳酸盐代表着陆地上普遍存在的气候条件。该δ ¹⁸ O和δ ¹³个土碳酸盐的C值是由当地和全球因素的控制，很多人不影响主要用来探测全球气候变化的海相碳酸盐。我们编制了成岩作用的氧和碳同位素数据（N= 12,167）从白垩纪到第四纪古土壤，以识别随时间变化的潜在趋势，并将其与可能的控制因素联系起来。尽管离散事件，如古-始新世最热显然证明，我们的分析揭示了的分布的增加的复杂性δ ¹⁸ öVS δ ¹³通过新生代C值。正如可以预期的，C的上升₄植物诱导朝着更高的偏移δ ¹³的第三系和第四期间C值。我们还表明，晚第三纪期间增加全球hypsometry在控制的主要作用δ ¹⁸ O和δ ¹³通过增加地形障碍顺风向下的成岩碳酸盐的C值。最后，第四，在增加的3‰期间δ ^18个O值是通过成壤碳酸盐和海洋有孔虫表明这两个指示符可以被用来跟踪全球气候信号记录两者。