Capillarity correction

{
  "id": "MLC-T-MET-004136",
  "term": "Capillarity correction",
  "field": "Meteorology and atmospheric science",
  "definition": "An adjustment made to mercury barometer readings to compensate for the depression of the mercury column caused by surface tension at the glass-mercury interface. This capillary action creates a convex meniscus, whose peak is lower than the level the mercury would otherwise reach. The correction amount is positive and depends on the tube's diameter and the meniscus height.",
  "see_also": [
    "barometric corrections",
    "capillary depression",
    "capillary action"
  ],
  "url": "https://mlchart.com/terminology/meteorology/capillarity-correction/"
}