Inverse Stratification Under Ice Checker
Screen actual under-ice 0–4°C warming-with-depth profile using caller measurement tolerance; candidate temperature evidence only, not salinity-aware stability or confirmation of whole-lake stratification.
Description
Under-ice inverse temperature evidence requires sampled warming with depth within 0–4°C.
Under-ice inverse temperature evidence requires sampled warming with depth within 0–4°C. Measurement tolerance determines resolved change.1
Enter aligned nonempty nonnegative strictly increasing depths (at least two), finite temperatures and nonnegative tolerance. Return strict warming, domain and joint flags.
When to use Inverse Stratification Under Ice Checker
Use Inverse Stratification Under Ice Checker when you need to evaluate the supplied records under the calculation and evidence rules below. Out-of-domain temperatures return false. No salinity-aware density stability or whole-lake stratification confirmation is supplied.
Prepare the observed lake or sample measurements and explicit calibration, reference values or thresholds requested. Keep depth coverage, units, dates and sampling conditions consistent.
How to use Inverse Stratification Under Ice Checker and understand its results
- Prepare the observed lake or sample measurements and explicit calibration, reference values or thresholds requested. Keep depth coverage, units, dates and sampling conditions consistent.
- Enter depthsBelowIceM, observedTemperaturesC, callerTemperatureToleranceC using the field table and calculation rules, then run the tool.
- Read resolvedWarmingWithDepth, withinInverseUnderIceTemperatureDomain, inverseUnderIceProfileCandidate. 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 |
|---|---|---|---|
| depthsBelowIceM | Depths below ice m | list of number | Required |
| observedTemperaturesC | Observed temperatures c | list of number | Required |
| callerTemperatureToleranceC | Caller temperature tolerance c | number | Required |
Enter aligned nonempty nonnegative strictly increasing depths (at least two), finite temperatures and nonnegative tolerance. Return strict warming, domain and joint flags.
warming=every adjacent temperature rise>tolerance; candidate=warming AND domain Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| resolvedWarmingWithDepth | Resolved warming with depth | boolean |
| withinInverseUnderIceTemperatureDomain | Within inverse under ice temperature domain | boolean |
| inverseUnderIceProfileCandidate | Inverse under ice profile candidate | boolean |
{
"input": {
"depthsBelowIceM": [
0,
1,
2
],
"observedTemperaturesC": [
0,
2,
4
],
"callerTemperatureToleranceC": 0.1
},
"output": {
"resolvedWarmingWithDepth": true,
"withinInverseUnderIceTemperatureDomain": true,
"inverseUnderIceProfileCandidate": true
}
}Limitations and assumptions
Out-of-domain temperatures return false. No salinity-aware density stability or whole-lake stratification confirmation is supplied.
Numeric inputs, where present, must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Numeric lists are limited to 10,000 entries; string lists to 128 strings of at most 128 characters each. The rules above may impose smaller limits. 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 Spring Turnover Trigger Temperature Checker: Near-isothermal temperature evidence can identify a spring-turnover candidate. Ice status and sampled reference proximity are additional gates. For a complementary task, use Relative Thermal Resistance Mixing Calculator: Relative thermal resistance normalizes a density contrast by a declared reference contrast. Its sign retains stable versus reversed ordering.
References
-
Inverse Stratification Under Ice Checker — tool.io
Similar or alternative tools
- Spring Turnover Trigger Temperature Checker
Near-isothermal temperature evidence can identify a spring-turnover candidate. Ice status and sampled reference proximity are additional gates.
- Relative Thermal Resistance Mixing Calculator
Relative thermal resistance normalizes a density contrast by a declared reference contrast. Its sign retains stable versus reversed ordering.