interactive calculators
Tools for carbonate and weathering workflows
Open Carbonate System
Speciation in fresh waters from temperature, pCO2, alkalinity, and major-ion compositions.
Seawater Carbonate System
Solve from any two of total alkalinity, DIC, pH, and pCO2, with calcite/aragonite saturation states.
Charge Balance
Check major-ion analyses for electrical neutrality and flag charge-balance error outside common limits.
XRF Oxide Simulator
Convert mineral formulas into theoretical XRF oxide weight fractions with a searchable RRUFF index.
Mineral Dissolution
Estimate spherical crystal lifetimes at pH 5 and 25 °C using the Lasaga dissolution-rate compilation.
Forsterite Dissolution
Explore forsterite lifetime as a function of pH, temperature, and initial grain radius.
Bjerrum Plot Explorer
Compare acid-base speciation fractions across pH for carbonate and organic-acid systems.
DIC vs pCO2
Inspect DIC response to atmospheric pCO2 across total-alkalinity scenarios.
Screen
Run quick plausibility checks before deeper modeling or lab interpretation.
Explain
Use transparent equations, references, and calculation steps for teaching and review.
Prototype
Test carbonate and mineral-weathering assumptions before building a full project workflow.