单词 | Dobson unit |
释义 | Dobson unit(abbreviation DU) noun A unit of measurement for the total amount of ozone in the atmosphere above a point on the earth’s surface, one Dobson unit being equivalent to a layer of pure ozone 0.01 mm thick at standard temperature and pressure.The ozone hole area is defined as the size of the region with total ozone below 220 Dobson units....
Origin1980s: from the name of G. M. B. Dobson (1889–1976), British meteorologist. |
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