Neutral Buoyancy Height Fraction Calculator
Normalize independently observed neutral-buoyancy boundary heights by SAME datum vent-to-top, no universal neutral plume fraction. Caller independently establishes units, regime, calibration and applicability; this does not establish design-code compliance, authenticity, operational safety, treatment efficacy or a validated forecast.
Description
A neutral-buoyancy height fraction locates an observed boundary within the measured vent-to-plume-top column.
A neutral-buoyancy height fraction locates an observed boundary within the measured vent-to-plume-top column.1
All elevations must share one datum before that fraction has meaning.
When to use Neutral Buoyancy Height Fraction Calculator
Use this tool when you need to reproduce the stated calculation from measured records or independently selected model inputs. Prepare matched observations and independently established site, specimen, units, datum, and calibration context.
How to use Neutral Buoyancy Height Fraction Calculator and understand its results
- Prepare matched observations and independently established site, specimen, units, datum, and calibration context.
- Enter observedVentElevationM, observedPlumeTopElevationM, observedNeutralBuoyancyElevationsM, following the field table and rules below, then run the tool.
- Read observedNeutralHeightFractions. Use the output meanings below to interpret units, signs, flags, and any nested result fields.
- Correct reported input issues and run again. For a successful result, check the stated evidence coverage and assumptions before using it in your review.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| observedVentElevationM | Observed vent elevation m | number | Required |
| observedPlumeTopElevationM | Observed plume top elevation m | number | Required |
| observedNeutralBuoyancyElevationsM | Observed neutral buoyancy elevations m | list of number | Required |
The plume top must exceed vent elevation. For each supplied neutral-buoyancy elevation, subtract the vent and divide by the positive plume height. Fractions must lie from zero to one inclusive.
f_i = (neutralElevation_i−ventElevation)/(topElevation−ventElevation) Symbols follow the input and output meanings and the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| observedNeutralHeightFractions | Observed neutral height fractions | list of number |
{
"input": {
"observedVentElevationM": 100,
"observedPlumeTopElevationM": 1100,
"observedNeutralBuoyancyElevationsM": [
500,
700
]
},
"output": {
"observedNeutralHeightFractions": [
0.4,
0.6
]
}
}Limitations and assumptions
Interpretation requires independently matched observations, units, site or specimen, and calibration. The calculation does not establish geological identity, operating safety, or an eruption forecast.
Missing required fields, unknown fields, wrong types, and violated calculation rules are input issues. Numeric values must be finite; nonfinite results are rejected. Evidence arrays must be dense, with no missing cells. Numeric observation lists allow at most 10,000 entries, subject to any smaller bounds stated above.
Alternative or Complementary methods
For a related review, use Hydrothermal Boiling Point Depth Curve Calculator: Hydrothermal boiling temperature depends on the pressure and fluid branch being used. This tool reads a supplied pressure–temperature calibration after composition, pressure, and datum have been resolved independently. For a complementary step, use Eruption Style Hawaiian Strombolian Vulcanian Classifier: Hawaiian, Strombolian, and Vulcanian style labels summarize different observed eruption behavior. This tool applies your evidence requirements for fountains, discrete bursts, or plug disruption and retains mixed or incomplete cases.
References
Similar or alternative tools
- Hydrothermal Boiling Point Depth Curve Calculator
Hydrothermal boiling temperature depends on the pressure and fluid branch being used. This tool reads a supplied pressure–temperature calibration after composition, pressure, and datum have been resolved independently.
- Eruption Style Hawaiian Strombolian Vulcanian Classifier
Hawaiian, Strombolian, and Vulcanian style labels summarize different observed eruption behavior. This tool applies your evidence requirements for fountains, discrete bursts, or plug disruption and retains mixed or incomplete cases.