Snow Layer Refreeze Capacity Term Tool

Description

Multiply nonnegative snowMass and suppliedHeatCapacity by max(0, -temperatureBelowZero) for coldContent.

Degree-time indices accumulate temperature differences above or below a supplied threshold. Multiplying by a model coefficient creates a conditional estimate whose units depend on the time basis and coefficient.

Multiply nonnegative snowMass and suppliedHeatCapacity by max(0, -temperatureBelowZero) for coldContent.

When to use this tool

Use Snow Layer Refreeze Capacity Term when you need one explicit temperature-index or threshold component.

How to use the tool and how it works

Enter snowMass, temperatureBelowZero, suppliedHeatCapacity, latentHeat, liquidMass. Use the units and conventions below.
Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
Read coldContent, freezeCapacity. Use the output convention below.

Multiply nonnegative snowMass and suppliedHeatCapacity by max(0, -temperatureBelowZero) for coldContent. Divide by positive latentHeat and cap by nonnegative liquidMass for freezeCapacity.^[1]

Input field	Meaning and units	Accepted input
snowMass	Snow Mass	Required. Finite number; minimum 0.
temperatureBelowZero	Signed temperature relative to the freezing reference; a negative value produces cold content.	Required. Finite number.
suppliedHeatCapacity	Nonnegative specific heat capacity in energy per mass per degree.	Required. Finite number; minimum 0.
latentHeat	Positive latent heat in the same energy per mass basis.	Required. Finite number; strictly above 0.
liquidMass	Liquid Mass	Required. Finite number; minimum 0.

Output field	Interpretation	Returned shape
coldContent	Cold Content	Required. Finite number.
freezeCapacity	Freeze Capacity	Required. Finite number.

json

{
  "input": {
    "snowMass": 100,
    "temperatureBelowZero": -2,
    "suppliedHeatCapacity": 2,
    "latentHeat": 400,
    "liquidMass": 5
  },
  "output": {
    "coldContent": 400,
    "freezeCapacity": 1
  }
}

Limitations and assumptions

Despite its name, temperatureBelowZero is a signed temperature relative to zero and must be negative for a cold deficit. Heat capacity and latent heat need compatible per-mass units; kinetics and heat exchange are omitted.
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

Check the threshold, coefficient calibration, and complete energy or environmental model separately.

References

Calculation and input contract: hydrometeorology/snow-layer-refreeze-capacity-term — tool.io

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