By Christian E Junge
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Concerning the ProductPublished through the yank Geophysical Union as a part of the Geophysical Monograph sequence. content material:
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6 and 7 were selected in such a way that the influence of local sources or sinks is avoided. Usually, ground observations of CO, are affected by local biological and anthropogenic activities, and the seasonal variations can be expected to exhibit geographical differences. 3 CARBON DIOXIDE 27 tal gradients of the CO, content. This is indeed observed and the measurements of the Scandinavian CO, network offer a substantial material for a detailed study. The latest review of these data given by Bischof (1960) is concerned with 19 stations operated since 1955.
F, must be integrated for wavelengths shorter than 2424A and f2 must be integrated over all absorption bands of 0,, including the infrared. However, visible and infrared light contribute very little to ozone destruction. Since the dependence of fJf, on altitude is complicated, it is impossible to obtain an analytical expression for 0,. Instead, the concentration has to be calculated numerically in steps, starting a t a high altitude, with an estimated intensity of the solar spectrum, and progressing downward.
As Fig. 8 shows, there has been an increase of about 13% since the turn of the century. The decrease of the C14/C12ratio is much less. 7% in wood from various parts of the world between 1940 and 1950, compared to wood from the 19th century. 3 35 CARBON DIOXIDE and 3% (see Bolin and Eriksson, 1959). Data later than 1953 are likely to be influenced by C14 produced in atomic tests. If isotopic exchange between atmosphere and ocean is neglected, these figures suggest that only 2-3% of the total CO, production had remained in the atmosphere and that the rest was absorbed by the ocean.