dagvariatie
Dagvariatie, or diurnal variation, is a term used to describe a pattern or change that repeats roughly every 24 hours. It arises from the rotation of the Earth and, in many phenomena, from daily solar heating. Diurnal variation can occur alongside longer-term trends and varies with latitude, season, and local conditions.
In meteorology and climatology, surface temperature shows a pronounced diurnal cycle: temperatures rise after sunrise, peak
In geophysics, the Earth's magnetic field exhibits diurnal variation, known as Sq, caused by ionospheric currents
Diurnal variation is important for practical purposes: forecasting solar power output, planning energy use, calibrating sensors,