dobson
n. countablen. a unit used to measure how much ozone is in the atmosphere above a specific place.
n. a unit of measurement for the total amount of a trace gas, typically ozone, in a vertical column of the atmosphere. One unit represents a layer of gas that would be 0.01 millimetres thick at standard temperature and pressure.
Scientists use the dobson unit to track the ozone hole.
The thickness of the ozone layer is typically around 300 to 500 dobson units in most parts of the world.
Researchers observed a significant drop in dobson units over the Antarctic region, signaling a seasonal thinning of the protective ozone layer that requires continuous satellite monitoring.
Almost exclusively used in the compound phrase 'dobson unit'; often capitalised as 'Dobson' because it is named after G.M.B. Dobson.