Dobson unit - a unit of measurement of ozone in the Earth’s atmosphere .
One Dobson unit is equal to an ozone layer of 10 μm at standard pressure and temperature [1] . This corresponds to 2.69 · 10 16 ozone molecules per square centimeter of the Earth’s surface, or 0.447 millimoles per square meter.
To determine the presence of an ozone hole , the atmospheric ozone limit of 220 Dobson units was selected.
The Dobson unit is named after Gordon Dobson , who in 1920 constructed the first instruments for measuring ozone levels. Now these devices are called Dobson ozone spectrometers .
Sources
- ↑ IUPAC Gold Book - Dobson unit in atmospheric chemistry (Last update: 2014-02-24; version: 2.3.3) // IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book") / Compiled by AD McNaught and A. Wilkinson. - Blackwell Scientific Publications, 1997. - DOI : 10.1351 / goldbook . (eng.)