Limnic CO2 Overturn Nyos Risk Checker

Compare total caller Henry-equivalent gas pressure to local absolute hydrostatic confinement; this equilibrium supersaturation screen cannot establish lake overturn, nucleation, eruption probability or safety.

Description

Dissolved gas has an equilibrium pressure under a Henry-law calibration.

Dissolved gas has an equilibrium pressure under a Henry-law calibration. Gas pressure above local hydrostatic confinement indicates equilibrium supersaturation.

When to use Limnic CO2 Overturn Nyos Risk Checker

Use this tool to compare total caller Henry-equivalent gas pressure to local absolute hydrostatic confinement; this equilibrium supersaturation screen cannot establish lake overturn, nucleation, eruption probability or safety.

Gather the relevant observations and fitted model parameters. Use the stated units and time basis; keep paired observations aligned.

How to use Limnic CO2 Overturn Nyos Risk Checker and understand its results

Gather the relevant observations and fitted model parameters. Use the stated units and time basis; keep paired observations aligned.
Enter dissolvedCo2MolPerM3, henryMolPerM3Pa, waterDepthM, waterDensityKgPerM3, gravityMPerSecondSquared, surfacePressurePa, otherGasEquivalentPressurePa using the field table and calculation rules, then run the tool.
Read totalEquivalentGasPressurePa, ambientAbsolutePressurePa, gasSupersaturationPressurePa, aboveEquilibriumGasPressure. The explanation below defines the units, signs, ordering and any flags or placeholder values.
If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.

Input field	Meaning	Value type; see rules below	Requirement
dissolvedCo2MolPerM3	Dissolved co2 mol per m3	number	Required
henryMolPerM3Pa	Henry mol per m3 Pa	number	Required
waterDepthM	Water depth m	number	Required
waterDensityKgPerM3	Water density kg per m3	number	Required
gravityMPerSecondSquared	Gravity m per second squared	number	Required
surfacePressurePa	Surface pressure Pa	number	Required
otherGasEquivalentPressurePa	Other gas equivalent pressure Pa	number	Required

Use positive Henry coefficient, water density, gravity and surface pressure, and nonnegative concentrations, depth and other-gas pressure. Return absolute pressures, signed excess and a flag only when excess is positive.^[1]

excess pressure = dissolved CO₂/Henry coefficient + other gas pressure − (surface pressure + ρgdepth)

Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.

Output field	Meaning	Value type
totalEquivalentGasPressurePa	Total equivalent gas pressure Pa	number
ambientAbsolutePressurePa	Ambient absolute pressure Pa	number
gasSupersaturationPressurePa	Gas supersaturation pressure Pa	number
aboveEquilibriumGasPressure	Above equilibrium gas pressure	boolean

json

{
  "input": {
    "dissolvedCo2MolPerM3": 10,
    "henryMolPerM3Pa": 0.0001,
    "waterDepthM": 1,
    "waterDensityKgPerM3": 1000,
    "gravityMPerSecondSquared": 10,
    "surfacePressurePa": 100000,
    "otherGasEquivalentPressurePa": 20000
  },
  "output": {
    "totalEquivalentGasPressurePa": 120000,
    "ambientAbsolutePressurePa": 110000,
    "gasSupersaturationPressurePa": 10000,
    "aboveEquilibriumGasPressure": true
  }
}

Limitations and assumptions

Equilibrium screening does not model lake overturn, bubble kinetics or eruption probability.

Numbers and computed results must be finite; overflow produces an error. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors. A successfully returned false flag is an evaluated outcome; its meaning is explained above.

Alternative or Complementary methods

Use Phreatomagmatic Maar Interaction Checker: Screen an upper-limit contacting-water vaporization budget including sensible/latent energy with a caller criterion; assumes all available heat transfers and cannot establish explosive phreatomagmatism or safe interaction. For a complementary task, use Bubble Nucleation Supersaturation Drop: Screen Laplace critical radius after a caller decompression while gas-equivalent pressure remains fixed; homogeneous nucleation barriers/kinetics and eruption triggering are not established.

References

Limnic CO2 Overturn Nyos Risk Checker — tool.io

Similar or alternative tools

Phreatomagmatic Maar Interaction Checker
Screen an upper-limit contacting-water vaporization budget including sensible/latent energy with a caller criterion; assumes all available heat transfers and cannot establish explosive phreatomagmatism or safe interaction.
Bubble Nucleation Supersaturation Drop
Screen Laplace critical radius after a caller decompression while gas-equivalent pressure remains fixed; homogeneous nucleation barriers/kinetics and eruption triggering are not established.