ENV100Y5 Lecture Notes - Lecture 25: Bromine, Montreal Protocol, Ecological Pyramid
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ENV100Y5 Full Course Notes
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Air pollution and ozone depletion part 3. Various gases in atmosphere act as a blind which are absorbing light radiation in certain wavelengths can function as a window allowing that light to pass through easily. Incoming solar radiation comes in at shorter wavelength radiation: energy comes in, does photosynthesis and moves around and is re-radiated as outgoing radiation with longer wavelength. Not a sloid layer between 25-35km of altitude. Doing something with electromagnetic spectrum see which wavelengths of light are absorbed. Satellite-based: total ozone mapping spectrometer (toms) on nimbus 7 spacecraft. Measures total ozone in a column of air. Also air based but mostly ground and satellite based. 100 dobson units (du) = 1-mm-thick layer of pure ozone at surface temperature and pressure. Ta(cid:374)da(cid:396)dized to su(cid:396)fa(cid:272)e te(cid:373)pe(cid:396)atu(cid:396)e a(cid:374)d p(cid:396)essu(cid:396)e (cid:271)e(cid:272)ause that"s (cid:449)hat we are familiar with: average ozone worldwide = 300 du.
