Friction Heating Melt Contribution
Balance basal traction×sliding power and caller heat partition to ice melt at pressure melting; not geothermal heating or a sliding-speed prediction.
Description
Sliding against basal traction dissipates mechanical energy.
Sliding against basal traction dissipates mechanical energy. The fraction of this heat entering ice can support melting at a pressure-melting bed.
Balance basal traction×sliding power and caller heat partition to ice melt at pressure melting; not geothermal heating or a sliding-speed prediction.
When to use Friction Heating Melt Contribution
Use this for the following task: Balance basal traction×sliding power and caller heat partition to ice melt at pressure melting; not geothermal heating or a sliding-speed prediction.
Prepare the measurements and calibration parameters in the declared units. Keep vector entries aligned and choose a consistent spatial frame and time basis.
How to use Friction Heating Melt Contribution and understand its results
- Prepare the measurements and calibration parameters in the declared units. Keep vector entries aligned and choose a consistent spatial frame and time basis.
- Enter basalTractionPa, slidingSpeedMPerYear, secondsPerYear, heatToIceFraction, iceDensityKgPerM3, latentHeatJPerKg using the field table, then run the tool.
- Read frictionHeatFluxWattsPerM2, iceMeltMetersPerYear. Interpret flags, units, ordering and placeholder values using the rules below.
- Review any reported issue or failed check, correct the supplied values when appropriate, and verify the result in its intended context.
| Input field | Meaning | Value type and bounds | Requirement |
|---|---|---|---|
| basalTractionPa | Basal traction pa | number | Required |
| slidingSpeedMPerYear | Sliding speed m per year | number | Required |
| secondsPerYear | Seconds per year | number | Required |
| heatToIceFraction | Heat to ice fraction | number | Required |
| iceDensityKgPerM3 | Ice density kg per m3 | number | Required |
| latentHeatJPerKg | Latent heat j per kg | number | Required |
Use nonnegative traction/speed, a heat partition in [0,1] and positive conversion constants. Return total friction heat and the ice melt associated with the partition.1
heat flux = traction × slidingSpeed/secondsPerYear; melt = traction × slidingSpeed × heatFraction/(ρice latentHeat) This summarizes the declared operation. Units, indexing, inclusivity and exceptional cases are explained in the surrounding text.
| Output field | Meaning | Value type |
|---|---|---|
| frictionHeatFluxWattsPerM2 | Friction heat flux watts per m2 | number |
| iceMeltMetersPerYear | Ice melt meters per year | number |
{
"input": {
"basalTractionPa": 100000,
"slidingSpeedMPerYear": 30,
"secondsPerYear": 30000000,
"heatToIceFraction": 0.5,
"iceDensityKgPerM3": 900,
"latentHeatJPerKg": 300000
},
"output": {
"frictionHeatFluxWattsPerM2": 0.1,
"iceMeltMetersPerYear": 0.005555555555555556
}
}Limitations and assumptions
No sliding speed is predicted. Geothermal heat, conductive loss and warming of cold ice require separate terms.
Constants and empirical coefficients are supplied rather than calibrated. Check units and observational applicability before interpreting the model. Malformed requests produce input errors. A successfully evaluated request can still contain false flags, empty result lists or a result outside the supplied threshold; those outcomes have the meanings stated above.
Alternative or Complementary methods
Choose Geothermal Flux Basal Melt for this operation: Convert net geothermal-minus-conductive basal heat to signed ice melt under pressure-melting conditions; negative flux represents freezing potential, not guaranteed actual freezing. For a complementary task, use Strain Heating Contribution for this operation: Contract full symmetric stress and strain-rate tensors, counting off-diagonal shear twice; negative power is preserved and flagged as inconsistent with positive dissipation, not relabeled heating.
The implementation reference documents the exact calculation, supported input shapes and returned fields.
References
-
Friction Heating Melt Contribution — tool.io
Similar or alternative tools
- Geothermal Flux Basal Melt
Convert net geothermal-minus-conductive basal heat to signed ice melt under pressure-melting conditions; negative flux represents freezing potential, not guaranteed actual freezing.
- Strain Heating Contribution
Contract full symmetric stress and strain-rate tensors, counting off-diagonal shear twice; negative power is preserved and flagged as inconsistent with positive dissipation, not relabeled heating.