. Elements of ecology. Ecology. Vertical Changes 135 earth's surface is shown in Fig. It will be seen that about half of the solar radiation is in the infrared region and this represents a di- rect supply of heat. The visible and ultraviolet portions of the sun's emission will also produce a heating effect after they have become absorbed. The sample calculations in Table 7 illustrate the relative absorption of the various parts of the spectrum by air and 3000 5000 7000 9000 11,000 13,000 15,000 17,000 19,000 A Wavelength Data jiom Fowie, 1927 Fig. Spectral distribution of sol
. Elements of ecology. Ecology. Vertical Changes 135 earth's surface is shown in Fig. It will be seen that about half of the solar radiation is in the infrared region and this represents a di- rect supply of heat. The visible and ultraviolet portions of the sun's emission will also produce a heating effect after they have become absorbed. The sample calculations in Table 7 illustrate the relative absorption of the various parts of the spectrum by air and 3000 5000 7000 9000 11,000 13,000 15,000 17,000 19,000 A Wavelength Data jiom Fowie, 1927 Fig. Spectral distribution of solar energy at the earth's surface, showing the ultraviolet (UV), visible (divided into color components), and infrared portions. TABLE 7 Comparison of Relative Absorption of Sun's Radiation by Air and Water Outside atmosphere Mt. Whitney, California 93 (summit 4420 m) Sea level 75 2 m below surface 71 30 m below surface 17 (clearest ocean water) Visible Light Infrared Radiation at 55 00 A at 8000 A Percentage Percentage Percentage Percentage of initial absorbed of initial absorbed value by each value by each remaining stratum remammg stratum 100 100 97 20 70 98. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Clarke, George L. (George Leonard), 1905-. New York, Wiley
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