XXI.—On the absorption of solar rays by atmospheric ozone

Abstract

View Article Online SOLAR RAYS BY ATMOSPHERIC OZONE. 113 extinguished. Under such circumstances, in judging of the absorptionspectrum of ozone, I am led to believe that nearly the maximum effect is produced when all rays are absorbed with a wavelength less than 293 millionths of a millimeter, and that the larger additions of ozone would only slightly increase the range of absorption. We may reasonably suppose that the atmospheric ozone, even if immeasurably greater in quantity in the layer of the atmosphere through which we observe the sun, would not shorten the spectrum much more than the highly charged layer of oxygen only 3 feet in thickness, used i n the preceding experiments. The extreme limits of the solar spectrum transmitted by the atmosphere, as observed by M. Cornu, under the most favourable conditions, are the following :-18'79.

Solar radiation and human health

“…Cornu [19] explained the lack of measurable solar radiation below this limit by strong absorption in the atmosphere. Hartley (1880) suggested that the atmosphere contained ozone [20] and Fabry et al (1913) later confirmed this by accurate measurements [21]. After the discovery of the Antarctic ozone 'hole' the 9 Figure 5.…”

“…Although the absorption properties of the biomolecules present in the skin and their distribution in general are more or less known, it is not easy to obtain a good value for the absorption coefficient as a function of depth in tissue. Much attention has been 20 devoted to such measurements, and we will discuss here some different approaches to experimentally obtain information on light propagation in tissue. The measurements can be divided into different categories depending on the information gained.…”

Ozone: From discovery to protection

“…The shape of the spectrum of the missing light matched only one chemical -ozone (Hartley, 1881). Ozone was identified in the atmosphere by Schönbein in 1867 and soon corroborated by Andrews in 1868 (Rubin, 2001) using chemical means.…”

Revisiting the “Ozone Hole” Metaphor: From Observational Window to Global Environmental Threat

“…One year later, in 1880, Walter Hartley suggested that this could only be due to the presence of ozone. In tribute to Hartley's pioneering work, scientists named the absorption band in the ultra-violet region the "Hartley band" (Hartley, 1880).…”