Storm Surge Hydrostatic Contribution Calculator
Inverse-barometer pressure anomaly contribution only, not wind-driven set-up or total storm surge, independent reference pressure explicit. 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
Atmospheric pressure changes contribute to sea-level anomalies through the inverse-barometer balance.
Atmospheric pressure changes contribute to sea-level anomalies through the inverse-barometer balance.1
This hydrostatic component is only one contribution to total storm surge.
When to use Storm Surge Hydrostatic Contribution Calculator
Use this tool to calculate or review the supplied observations under the stated rules. Match the observation interval, units, datum, coordinate signs and model regime.
How to use Storm Surge Hydrostatic Contribution Calculator and understand its results
- Match the observation interval, units, datum, coordinate signs and model regime.
- Enter observedAtmosphericPressurePa, callerMatchedReferencePressurePa, observedWaterDensityKgM3, gravityMSecond2, using the field meanings and rules below, then run the tool.
- Read inverseBarometerSurgeContributionM. Inspect nested result fields where present, and review unknown records separately from known matches.
- Correct any reported input issue and run again. Before using a successful result, check the stated units, signs, reference scope and observation coverage.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| observedAtmosphericPressurePa | Observed atmospheric pressure pa | number | Required |
| callerMatchedReferencePressurePa | Caller matched reference pressure pa | number | Required |
| observedWaterDensityKgM3 | Observed water density kg m3 | number | Required |
| gravityMSecond2 | Gravity m second2 | number | Required |
Use positive observed and reference pressures, water density and gravity. Divide reference-minus-observed pressure by density×gravity; a higher observed pressure produces a negative anomaly.
η=(p_reference−p_observed)/(ρg) Use the matching field units and the exact boundary, ordering and reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| inverseBarometerSurgeContributionM | Inverse barometer surge contribution m | number |
{
"input": {
"observedAtmosphericPressurePa": 100000,
"callerMatchedReferencePressurePa": 101000,
"observedWaterDensityKgM3": 1000,
"gravityMSecond2": 10
},
"output": {
"inverseBarometerSurgeContributionM": 0.1
}
}Limitations and assumptions
The stated observation or model covers only the supplied record and reference regime. It does not fill missing measurements, supply uncertainty estimates or produce a validated forecast.
Missing required fields, unknown fields, wrong types and violated rules return input issues. Numeric values and outputs must be finite.
Alternative or Complementary methods
For a related step, use Overwash Freeboard Threshold Checker: Freeboard measures the height of a crest above the still-water level. For a complementary comparison, use Setup Plus Swash Stockdon Split Calculator: Wave setup and swash contribute to extreme runup on a beach.
References
Similar or alternative tools
- Overwash Freeboard Threshold Checker
Freeboard measures the height of a crest above the still-water level.
- Setup Plus Swash Stockdon Split Calculator
Wave setup and swash contribute to extreme runup on a beach.