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Aerosol Organic Carbon Mass Factor Tool

Apply a supplied organic-matter/organic-carbon factor; no aerosol-composition factor is selected.

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Description

Return organic matter from a supplied organic-carbon multiplier.

Particle and droplet terms depend on size representation, weights, density, drag and logarithmic-bin conventions. A spherical growth or low-Reynolds approximation is a local model term rather than a measured size distribution, composition or health/exposure assessment.

Return organic matter from a supplied organic-carbon multiplier.

When to use this tool

Use Aerosol Organic Carbon Mass Factor when checking the stated particle, droplet, drag, growth or bin-basis convention.

How to use the tool and how it works

  1. Enter organicCarbonMass, suppliedOmOcFactor, totalParticleMass. Use the units and conventions below.
  2. Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
  3. Read organicMatterMass, organicMatterFraction. Use the output convention below.

Return organic matter from a supplied organic-carbon multiplier. Require carbon mass >= 0, OM/OC factor >= 1 and totalParticleMass > 0; organicMatterMass = carbon*factor, fraction = organicMatterMass/total.1

Input fieldMeaning and unitsAccepted input
organicCarbonMassOrganic Carbon MassRequired. Finite number; minimum 0.
suppliedOmOcFactorSupplied Om Oc FactorRequired. Finite number; minimum 1.
totalParticleMassTotal Particle MassRequired. Finite number; strictly above 0.
Output fieldInterpretationReturned shape
organicMatterMassOrganic Matter MassRequired. Finite number.
organicMatterFractionOrganic Matter FractionRequired. Finite number.
json
{
  "input": {
    "organicCarbonMass": 10,
    "suppliedOmOcFactor": 1.8,
    "totalParticleMass": 100
  },
  "output": {
    "organicMatterMass": 18,
    "organicMatterFraction": 0.18
  }
}

Limitations and assumptions

  • The fraction may exceed one; no composition, source apportionment, appropriate factor or health interpretation is established.
  • Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
  • Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.

Alternative or Complementary methods

Use verified particle measurements and an appropriate complete distribution/transport model with justified material, shape and flow assumptions for atmospheric inference.

References

  1. Calculation and input contract: atmospheric-chemistry/aerosol-organic-carbon-mass-factor — tool.io

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