Skip to content

Slot: Derived Heat Metric (derived_heat_metric)

Heat-metric methodology, present when the variable is a derived heat metric — see envar_heat_metric. Omitted for non-heat variables.

Tier: conditionally_core

Why this slot matters

Heat metrics like WBGT or Heat Index can be computed by several non-equivalent equations from different inputs, and heat-wave flags depend on the threshold definition; the heat-epidemiology literature flags these choices as the main sources of cross-study disagreement, so omitting the block for a heat metric makes the record uncomparable.

In plain terms

Some heat measures are not read from a thermometer but calculated from several ingredients (temperature, humidity, wind, sunshine) using a chosen formula. This block records which formula and ingredients were used — it is only needed when the variable is one of these computed heat metrics.

URI: envar:slot/derived_heat_metric

Applicable Classes

Name Description Modifies Slot
EnvironmentalExposureRecord A single environmental-exposure record sidecar: the complete metadata graph t... no
DailyMaxTemperatureRecord Canonical record for daily maximum 2 m air temperature (Tmax) no
DailyMinTemperatureRecord Canonical record for daily minimum 2 m air temperature (Tmin) no
WetBulbGlobeTemperatureOutdoorRecord Canonical record for outdoor WBGT under the Liljegren 2008 formulation yes
ExtremeHeatDayFlagRecord Canonical record for a daily binary extreme-heat-day flag, defined against a ... yes

Properties

Type and Range

Property Value
Range DerivedHeatMetric
Domain Of EnvironmentalExposureRecord
Slot Group variable_specific_extensions

Cardinality and Requirements

Property Value

Examples

Value
None

Identifier and Mapping Information

Annotations

property value
tier conditionally_core
justification Heat metrics like WBGT or Heat Index can be computed by several non-equivalent equations from different inputs, and heat-wave flags depend on the threshold definition; the heat-epidemiology literature flags these choices as the main sources of cross-study disagreement, so omitting the block for a heat metric makes the record uncomparable.
explanation Some heat measures are not read from a thermometer but calculated from several ingredients (temperature, humidity, wind, sunshine) using a chosen formula. This block records which formula and ingredients were used — it is only needed when the variable is one of these computed heat metrics.

Schema Source

Mappings

Mapping Type Mapped Value
self envar:derived_heat_metric
native envar:derived_heat_metric

LinkML Source

name: derived_heat_metric
annotations:
  tier:
    tag: tier
    value: conditionally_core
  justification:
    tag: justification
    value: Heat metrics like WBGT or Heat Index can be computed by several non-equivalent
      equations from different inputs, and heat-wave flags depend on the threshold
      definition; the heat-epidemiology literature flags these choices as the main
      sources of cross-study disagreement, so omitting the block for a heat metric
      makes the record uncomparable.
  explanation:
    tag: explanation
    value: Some heat measures are not read from a thermometer but calculated from
      several ingredients (temperature, humidity, wind, sunshine) using a chosen formula.
      This block records which formula and ingredients were used — it is only needed
      when the variable is one of these computed heat metrics.
description: Heat-metric methodology, present when the variable is a derived heat
  metric — see envar_heat_metric. Omitted for non-heat variables.
title: Derived Heat Metric
examples:
- description: illustrative outdoor-WBGT methodology block — not part of the tmax
    scenario, where this slot is omitted
  object:
    heat_metric_family: wbgt_outdoor
    equation_variant: liljegren_2008
    indoor_outdoor: outdoor
    solar_radiation_basis: surface_downwelling_shortwave_flux
from_schema: https://w3id.org/linkml/microschemas/envar
rank: 1000
domain_of:
- EnvironmentalExposureRecord
slot_group: variable_specific_extensions
range: DerivedHeatMetric
inlined: true