Diurnal variation

{
  "id": "MLC-T-CHM-003355",
  "term": "Diurnal variation",
  "field": "Chemistry",
  "definition": "The regular pattern of change or fluctuation in a physical or chemical parameter that occurs over a 24-hour period, primarily influenced by the Earth's rotation and the daily cycle of solar radiation. This can include changes in temperature, humidity, atmospheric pressure, or the concentration of certain atmospheric pollutants. For example, ozone concentrations in urban areas often exhibit a diurnal variation.",
  "subject": "Chemistry and the Environment",
  "references": [
    "PAC, 1990, 62, 2167. 'Glossary of atmospheric chemistry terms (Recommendations 1990)' on page 2185 (https://doi.org/10.1351/pac199062112167)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/diurnal-variation/"
}