Ice Cliff Backwasting Enhancement Calculator
Calibrate actual cliff backwasting enhancement and distinguish normal-face from represented plan-area convention; not universal debris enhancement or predicting melt rate from aspect alone.
Description
Cliff enhancement can compare normal backwasting with reference flat-ice melt.
Cliff enhancement can compare normal backwasting with reference flat-ice melt. Represented plan area adds a separate geometry factor.1
Enter nonnegative cliff rate/face area and positive reference rate/plan area. Return both dimensionless factors.
When to use Ice Cliff Backwasting Enhancement Calculator
Use Ice Cliff Backwasting Enhancement Calculator when you need to evaluate the supplied records under the calculation and evidence rules below. No universal debris effect, aspect response or independent melt prediction is supplied.
Prepare the observed ice, snow, water or geometry measurements and explicit calibration parameters requested. Keep coordinates, datum, density and time units consistent.
How to use Ice Cliff Backwasting Enhancement Calculator and understand its results
- Prepare the observed ice, snow, water or geometry measurements and explicit calibration parameters requested. Keep coordinates, datum, density and time units consistent.
- Enter cliffNormalBackwastingMDay, referenceFlatIceMeltMDay, cliffFaceAreaM2, representedPlanAreaM2 using the field table and calculation rules, then run the tool.
- Read observedNormalBackwastingEnhancement, planAreaEquivalentEnhancement. 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 |
|---|---|---|---|
| cliffNormalBackwastingMDay | Cliff normal backwasting m day | number | Required |
| referenceFlatIceMeltMDay | Reference flat ice melt m day | number | Required |
| cliffFaceAreaM2 | Cliff face area m2 | number | Required |
| representedPlanAreaM2 | Represented plan area m2 | number | Required |
Enter nonnegative cliff rate/face area and positive reference rate/plan area. Return both dimensionless factors.
normalEnhancement=cliffRate/referenceRate; planEnhancement=normalEnhancement×faceArea/planArea Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| observedNormalBackwastingEnhancement | Observed normal backwasting enhancement | number |
| planAreaEquivalentEnhancement | Plan area equivalent enhancement | number |
{
"input": {
"cliffNormalBackwastingMDay": 0.04,
"referenceFlatIceMeltMDay": 0.01,
"cliffFaceAreaM2": 10,
"representedPlanAreaM2": 20
},
"output": {
"observedNormalBackwastingEnhancement": 4,
"planAreaEquivalentEnhancement": 2
}
}Limitations and assumptions
No universal debris effect, aspect response or independent melt prediction is supplied.
Numeric inputs, where present, must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.
Alternative or Complementary methods
Use Ice Cliff Mass Loss Per Year Calculator: Face-normal backwasting times actual cliff-face area gives a signed volume-loss rate. Projected horizontal area has a different meaning. For a complementary task, use Enhancement Factor Soft Ice Calculator: Observed strain relative to an unenhanced model yields an apparent softening factor. Model errors can contribute to that factor.
References
Similar or alternative tools
- Ice Cliff Mass Loss Per Year Calculator
Face-normal backwasting times actual cliff-face area gives a signed volume-loss rate. Projected horizontal area has a different meaning.
- Enhancement Factor Soft Ice Calculator
Observed strain relative to an unenhanced model yields an apparent softening factor. Model errors can contribute to that factor.