CO2 SO2 Molar Ratio Volcanic
Convert paired mass concentrations to a blank-corrected volcanic CO2/SO2 molar ratio on the same gas basis; signed CO2 nondetections remain explicit and a nonpositive SO2 denominator is not assigned a ratio.
Description
Mass and molar gas ratios differ because CO₂ and SO₂ have different molar masses.
Mass and molar gas ratios differ because CO₂ and SO₂ have different molar masses. Blank correction must precede ratio calculation.
Convert paired mass concentrations to a blank-corrected volcanic CO2/SO2 molar ratio on the same gas basis; signed CO2 nondetections remain explicit and a nonpositive SO2 denominator is not assigned a ratio.
When to use CO2 SO2 Molar Ratio Volcanic
Use this tool to convert paired mass concentrations to a blank-corrected volcanic CO2/SO2 molar ratio on the same gas basis; signed CO2 nondetections remain explicit and a nonpositive SO2 denominator is not assigned a ratio.
Gather the relevant observations and fitted model parameters. Use the stated units and time basis; keep paired observations aligned.
How to use CO2 SO2 Molar Ratio Volcanic and understand its results
- Gather the relevant observations and fitted model parameters. Use the stated units and time basis; keep paired observations aligned.
- Enter co2MassConcentrationMgPerM3, so2MassConcentrationMgPerM3, co2MolarMassGramsPerMol, so2MolarMassGramsPerMol, co2BlankMgPerM3, so2BlankMgPerM3 using the field table and calculation rules, then run the tool.
- Read blankCorrectedCo2ToSo2MolarRatio, co2AboveBlank. 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 |
|---|---|---|---|
| co2MassConcentrationMgPerM3 | Co2 mass concentration mg per m3 | number | Required |
| so2MassConcentrationMgPerM3 | So2 mass concentration mg per m3 | number | Required |
| co2MolarMassGramsPerMol | Co2 molar mass grams per mol | number | Required |
| so2MolarMassGramsPerMol | So2 molar mass grams per mol | number | Required |
| co2BlankMgPerM3 | Co2 blank mg per m3 | number | Required |
| so2BlankMgPerM3 | So2 blank mg per m3 | number | Required |
Use positive molar masses and nonnegative concentrations and blanks on the same gas basis. Require corrected SO₂ positive; retain signed corrected CO₂ and report whether it is strictly above blank.1
molar ratio = (corrected CO₂/corrected SO₂) × SO₂ molar mass/CO₂ molar mass Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| blankCorrectedCo2ToSo2MolarRatio | Blank corrected co2 to so2 molar ratio | number |
| co2AboveBlank | Co2 above blank | boolean |
{
"input": {
"co2MassConcentrationMgPerM3": 44,
"so2MassConcentrationMgPerM3": 64,
"co2MolarMassGramsPerMol": 44,
"so2MolarMassGramsPerMol": 64,
"co2BlankMgPerM3": 0,
"so2BlankMgPerM3": 0
},
"output": {
"blankCorrectedCo2ToSo2MolarRatio": 1,
"co2AboveBlank": true
}
}Limitations and assumptions
Nonpositive SO₂ has no assigned ratio. Sampling conditions and source attribution are outside the calculation.
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 SO2 Mass Flux Tonnes Day: Integrate blank-corrected SO2 cross-plume column mass and multiply by signed normal plume speed; negative nondetections/transport remain signed, with no eruption-alert threshold or wind-direction inference. For a complementary task, use Diffuse CO2 Soil Flux Average: Aggregate patch-representative blank/background-corrected diffuse soil CO2 fluxes with physical area weights; signed uptake/nondetections are retained and unmeasured area is not interpolated.
References
-
CO2 SO2 Molar Ratio Volcanic — tool.io
Similar or alternative tools
- SO2 Mass Flux Tonnes Day
Integrate blank-corrected SO2 cross-plume column mass and multiply by signed normal plume speed; negative nondetections/transport remain signed, with no eruption-alert threshold or wind-direction inference.
- Diffuse CO2 Soil Flux Average
Aggregate patch-representative blank/background-corrected diffuse soil CO2 fluxes with physical area weights; signed uptake/nondetections are retained and unmeasured area is not interpolated.