The formation of soils, the evolution of the biosphere, and the CO 2 content in the atmosphere are strongly impacted by chemical weathering. Due to its manifold importance for the long-term stability of the Critical Zone, it is crucial to link weathering rates to the environmental conditions affecting it and develop accurate rate laws for landscape evolution and carbon cycle modeling. Here we use the π theorem of dimensional analysis to provide a theoretical framework to global datasets of weathering rates. As a result, a strong relation between chemical depletion, precipitation and potential evapotranspiration synthesizes the primary role of wetness. Based on this finding, we estimate the spatial distribution of chemical depletion fraction and find that, globally, soils are 50% chemically depleted, 61% of the land is in kinetic-limited conditions, while only 1% is supply-limited. The remaining 38% of the land is in a transitional regime and susceptible to change...

中文翻译：

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全球化学风化的湿度控制

土壤的形成，生物圈的演变以及大气中的CO 2含量都受到化学风化的强烈影响。由于它对于关键区的长期稳定性具有多重重要性，因此至关重要的是将风化率与影响关键区的环境条件联系起来，并为景观演变和碳循环建模开发准确的率定律。在这里，我们使用维分析的π定理为风化率的全球数据集提供理论框架。结果，化学消耗，降水与潜在蒸散量之间的密切关系综合了湿度的主要作用。根据这一发现，我们估算了化学耗竭分数的空间分布，并发现全球范围内的土壤化学耗竭率为50％，土地的动力学限制为61％，而只有1％受限制。其余38％的土地处于过渡时期，容易发生变化。