The supplementary materials for the article "Accelerated Phosphorus Weathering under Warm Climates" by Licheng Guo et al. provide detailed data and analyses supporting the main findings. The materials include: 1. **Data Distribution**: The study covers surface soils from the upper tropics to mid to high latitudes, primarily in East Asia, Europe, North America, Australia, and Africa. Equatorial soils are notably absent, which may introduce biases in the observed relationships. 2. **Potential Factors Controlling P Mobility**: The relationship between P₂O₅/TiO₂ molar ratios and various environmental factors (temperature, precipitation, runoff, biome, lithology, elevation, and inclination) is analyzed. Temperature shows a clear negative correlation with P₂O₅/TiO₂ molar ratios, while other factors exhibit more complex relationships. 3. **Extrapolation of Soil P₂O₅/TiO₂ to P Weathering Fluxes**: The assumption that erosion rates are stable globally is discussed, and the impact of climate on P weathering fluxes is supported by previous models and site-specific studies. The calculation of P release rates using the P₂O₅/TiO₂ ratio is detailed, and the robustness of the method is highlighted. 4. **Figures and Tables**: Various figures and tables provide visual and numerical support for the text, including relationships between environmental factors and P₂O₅/TiO₂ molar ratios, mineralogy of clay-sized particles, and the distribution of land area during major oceanic anoxic events (OAEs). 5. **References**: A comprehensive list of references is provided, covering a wide range of topics from geochemistry to paleoclimate and biogeochemistry, supporting the scientific basis of the study. These supplementary materials enhance the understanding of the mechanisms and implications of phosphorus weathering under warm climates.The supplementary materials for the article "Accelerated Phosphorus Weathering under Warm Climates" by Licheng Guo et al. provide detailed data and analyses supporting the main findings. The materials include: 1. **Data Distribution**: The study covers surface soils from the upper tropics to mid to high latitudes, primarily in East Asia, Europe, North America, Australia, and Africa. Equatorial soils are notably absent, which may introduce biases in the observed relationships. 2. **Potential Factors Controlling P Mobility**: The relationship between P₂O₅/TiO₂ molar ratios and various environmental factors (temperature, precipitation, runoff, biome, lithology, elevation, and inclination) is analyzed. Temperature shows a clear negative correlation with P₂O₅/TiO₂ molar ratios, while other factors exhibit more complex relationships. 3. **Extrapolation of Soil P₂O₅/TiO₂ to P Weathering Fluxes**: The assumption that erosion rates are stable globally is discussed, and the impact of climate on P weathering fluxes is supported by previous models and site-specific studies. The calculation of P release rates using the P₂O₅/TiO₂ ratio is detailed, and the robustness of the method is highlighted. 4. **Figures and Tables**: Various figures and tables provide visual and numerical support for the text, including relationships between environmental factors and P₂O₅/TiO₂ molar ratios, mineralogy of clay-sized particles, and the distribution of land area during major oceanic anoxic events (OAEs). 5. **References**: A comprehensive list of references is provided, covering a wide range of topics from geochemistry to paleoclimate and biogeochemistry, supporting the scientific basis of the study. These supplementary materials enhance the understanding of the mechanisms and implications of phosphorus weathering under warm climates.