Description
Return logarithmic mean pressure across a layer.
Atmospheric state formulas depend on absolute temperature, pressure reference, water mass/volume bases and layer assumptions. Local adiabatic, hydrostatic or precipitation terms can illustrate a supplied model without reconstructing an actual profile, validating an instrument or predicting weather hazards.
Return logarithmic mean pressure across a layer.
When to use this tool
Use Atmospheric Science: Pressure Thickness Log Layer Mean when checking the stated atmospheric pressure, temperature, humidity or water-basis term.
How to use the tool and how it works
- Enter lowerPressure, upperPressure. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read result. Expand result to inspect the returned fields.
Return logarithmic mean pressure across a layer. Require lowerPressure > upperPressure > 0; logMeanPressure = (lower-upper)/(ln(lower)-ln(upper)).1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| lowerPressure | Lower Pressure | Required. Finite number. |
| upperPressure | Upper Pressure | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| result | Returned calculated value or nested object under the stated output convention. | Required. Object. |
| result.logMeanPressure | Logarithmic mean, distinct from geometric midpoint sqrt(lower*upper). | Calculated result member: number. |
{
"input": {
"lowerPressure": 100,
"upperPressure": 50
},
"output": {
"result": {
"logMeanPressure": 72.13475204444818
}
}
}Limitations and assumptions
- This differs from geometric midpoint pressure and is not an arithmetic layer average; pressures must share units and actual observations are not verified.
- Outputs are nested inside result. 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
Use verified observations and an appropriate complete thermodynamic/profile analysis with explicit units, references and moisture assumptions for meteorological conclusions.
References
Similar or alternative tools
- Pressure Layer Log Midpoint
Return geometric midpoint pressure and signed logarithmic thickness.
- Pressure Layer Mass Factor
Return hydrostatic layer mass per area.