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Enum: Day-Boundary Convention (DayBoundaryConventionEnum)

Where the 24-hour day window starts. The single most-omitted slot in the environmental-health literature.

URI: envar:enum/DayBoundaryConventionEnum

Permissible Values

Value Meaning Description Additional Info
local_midnight None Day starts at local midnight at the target location
utc_midnight None Day starts at 00:00 UTC
ending_1200_gmt None 24-hour window ending 12:00 GMT, used by PRISM and historically common in US ... Title: 24h ending 1200 GMT
solar_noon_centered None 24-hour window centered on local solar noon
observation_dependent None Day boundary follows whatever the underlying observation network uses (e
not_applicable None No day boundary applies — e

Slots

Name Description
day_boundary_convention Where the 24-hour day window starts

Identifier and Mapping Information

Schema Source

LinkML Source

name: DayBoundaryConventionEnum
description: Where the 24-hour day window starts. The single most-omitted slot in
  the environmental-health literature.
title: Day-Boundary Convention
from_schema: https://w3id.org/linkml/microschemas/envar
rank: 1000
permissible_values:
  local_midnight:
    text: local_midnight
    description: Day starts at local midnight at the target location. Daymet convention.
  utc_midnight:
    text: utc_midnight
    description: Day starts at 00:00 UTC. NARR / ERA5 sub-daily are computed against
      this.
  ending_1200_gmt:
    text: ending_1200_gmt
    description: 24-hour window ending 12:00 GMT, used by PRISM and historically common
      in US station-network products.
    title: 24h ending 1200 GMT
  solar_noon_centered:
    text: solar_noon_centered
    description: 24-hour window centered on local solar noon.
  observation_dependent:
    text: observation_dependent
    description: Day boundary follows whatever the underlying observation network
      uses (e.g. weather-station local custom).
  not_applicable:
    text: not_applicable
    description: No day boundary applies — e.g. an annual or monthly aggregate where
      the sub-daily window is not a meaningful concept (SPEC §5).