noun
- Lines on a map connecting points that receive equal amounts of sunshine or solar radiation over a given period.
Usage: technical; geography; meteorology; plural of isohel
Examples
- Meteorologists use isohels to map solar radiation distribution across regions.
- The isohels on the climate map show where sunshine duration is equivalent.
- Isohels help researchers understand variations in solar exposure between different latitudes.
- Agricultural planners consult isohels to determine optimal crop locations based on sunlight availability.