Column

{
  "id": "MLC-T-MET-004526",
  "term": "Column",
  "field": "Meteorology and atmospheric science",
  "definition": "A hypothetical vertical cylinder of air extending from the Earth's surface to a specified altitude or to the top of the atmosphere. Scientists use this concept to analyze the properties and budget of atmospheric constituents, such as water vapor, ozone, or pollutants, within a defined vertical space. The total amount of a substance in the column is expressed as its column density, measured in units like Dobson Units for ozone or kilograms per square meter for water vapor.",
  "url": "https://mlchart.com/terminology/meteorology/column/"
}