Calving Front Cliff Height Above Water Calculator
Measure observed cliff top relative to water/toe in caller same vertical datum; signed submerged top retained, no flotation thickness inversion or datum transformation.
Description
Calving-cliff height can be measured relative to both water level and toe.
Calving-cliff height can be measured relative to both water level and toe. A submerged top remains a signed observation.1
Enter finite elevations sharing one datum with top≥toe. Return signed above-water height, total height and water-above-top flag.
When to use Calving Front Cliff Height Above Water Calculator
Use Calving Front Cliff Height Above Water Calculator when you need to evaluate the supplied records under the calculation and evidence rules below. No datum conversion or flotation-based thickness inference 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 Calving Front Cliff Height Above Water 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 cliffTopElevationM, waterSurfaceElevationM, cliffToeElevationM using the field table and calculation rules, then run the tool.
- Read observedAboveWaterCliffHeightM, totalObservedCliffHeightM, waterAboveCliffTop. 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 |
|---|---|---|---|
| cliffTopElevationM | Cliff top elevation m | number | Required |
| waterSurfaceElevationM | Water surface elevation m | number | Required |
| cliffToeElevationM | Cliff toe elevation m | number | Required |
Enter finite elevations sharing one datum with top≥toe. Return signed above-water height, total height and water-above-top flag.
aboveWater=top−water; total=top−toe Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| observedAboveWaterCliffHeightM | Observed above water cliff height m | number |
| totalObservedCliffHeightM | Total observed cliff height m | number |
| waterAboveCliffTop | Water above cliff top | boolean |
{
"input": {
"cliffTopElevationM": 10,
"waterSurfaceElevationM": 2,
"cliffToeElevationM": -5
},
"output": {
"observedAboveWaterCliffHeightM": 8,
"totalObservedCliffHeightM": 15,
"waterAboveCliffTop": false
}
}Limitations and assumptions
No datum conversion or flotation-based thickness inference 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. A successfully returned false flag is an evaluated outcome; its meaning is explained above.
Alternative or Complementary methods
Use Flotation Fraction Buoyancy Calculator: Buoyant support depends on submerged draft relative to total thickness and the two densities. The ratio can exceed total ice weight. For a complementary task, use Subglacial Water Pressure Ratio Calculator: Ice overburden provides a reference pressure for subglacial water. Ratios above one should remain visible as superflotation evidence.
References
Similar or alternative tools
- Flotation Fraction Buoyancy Calculator
Buoyant support depends on submerged draft relative to total thickness and the two densities. The ratio can exceed total ice weight.
- Subglacial Water Pressure Ratio Calculator
Ice overburden provides a reference pressure for subglacial water. Ratios above one should remain visible as superflotation evidence.