Editing Population-weighted heat exposure (degree-days) (section)

== Monitoring and Measurement ==
Population-weighted heat exposure is derived from temperature observations combined with population data. Temperature data are typically obtained from meteorological stations, satellite remote sensing, and climate reanalysis products that provide spatially resolved temperature fields. Population distributions are sourced from census data, demographic surveys, and gridded population datasets. The integration involves calculating degree-days above a defined temperature threshold, weighted by the number of people exposed in each geographic unit. Scientific institutions and climate research centers contribute to data collection and methodological development, employing standardized measurement conventions for temperature and population metrics.

Within the SIGNAL system, population-weighted heat exposure (degree-days) is treated as a defined environmental signal whose boundaries and measurement conventions are described below.