Global monthly potential nutrient supply data at 0.5° resolution, 2001–2020

<p dir="ltr">This dataset provides global monthly estimates of potential nitrogen supply (N), potential phosphorus supply(P), and integrated potential nutrient supply at 0.5° spatial resolution from 2001 to 2020.</p><p dir="ltr">Potential nutrient supply was estimated using monthly heterotrophic respiration (Rh) normalized by soil organic carbon (SOC) stock (Rh/SOC) as a proxy for microbially mediated soil organic carbon turnover.

This turnover proxy was then multiplied by soil total nitrogen and soil organic phosphorus concentrations to estimate potential N and P supply, respectively. Integrated potential nutrient supply was further derived by comparing the potential N:P supply ratio with a spatially varying leaf N:P stoichiometric reference. Following Liebig’s law of the minimum, the nutrient in shorter supply relative to this vegetation stoichiometric reference defined the integrated potential nutrient supply.</p><p dir="ltr">Each NetCDF file contains the following variables:</p><ul><li><code>PS_Nutrient_Neq</code>: integrated potential nutrient supply expressed in N-equivalent units, with units of <code>mg N kg⁻¹ soil month⁻¹</code>.</li><li><code>PS_Nutrient_Peq</code>: integrated potential nutrient supply expressed in P-equivalent units, with units of <code>mg P kg⁻¹ soil month⁻¹</code>.</li><li><code>PS_N</code>: potential nitrogen supply estimated from the Rh/SOC turnover proxy and soil total N concentration, with units of <code>mg N kg⁻¹ soil month⁻¹</code>.</li><li><code>PS_P</code>: potential phosphorus supply estimated from the Rh/SOC turnover proxy and soil organic P concentration, with units of <code>mg P kg⁻¹ soil month⁻¹</code>.</li><li><code>yyyymm</code>: calendar year and month in <code>YYYYMM</code> format.</li></ul><p dir="ltr">The dataset includes two Rh-based versions: (1) MiCASA-based potential nutrient supply (2001–2020) and (2) CASA-GFED3-based potential nutrient supply (2001–2020).