. Carnegie Institution of Washington publication. 230 Papers from the Department of Marine Biology. it seems possible for clouds to make notches in the diurnal curves, and sudden squalls have a similar effect. On July 10, 19, 20, 21, 22, 23, 24, and 25 very frequent determina- tions were made, so that the notches in the curves could be studied. With the omission of these small notches, the diurnal curves are plotted in figure 6. It may be observed that there was a general upward drift in temperature during July of about 2°. As a consequence of rise in temperature and increased cloudiness, ther
. Carnegie Institution of Washington publication. 230 Papers from the Department of Marine Biology. it seems possible for clouds to make notches in the diurnal curves, and sudden squalls have a similar effect. On July 10, 19, 20, 21, 22, 23, 24, and 25 very frequent determina- tions were made, so that the notches in the curves could be studied. With the omission of these small notches, the diurnal curves are plotted in figure 6. It may be observed that there was a general upward drift in temperature during July of about 2°. As a consequence of rise in temperature and increased cloudiness, there was a fall in the oxygen July 12345 10. FIG. 6.—Diurnal variation curves of sea-water from station A, Tortugas, during July, 1917. The date is marked on the right-hand border of the day interval, or where omitted it may be determined by counting the waves of the curve. The trough of the wave represents the early morning and the crest of the wave represents the early afternoon. The top curve represents the number of cubic centimeters O* per liter; the second curve, the excess or deficiency of saturation; the third curve, the number of cubic centimeters CO-z per liter; the fourth curve, CO? tension; fifth, pH; and sixth, temperature. concentration in the sea-water during July. July 10 was an unusually calm day (up to 9 p. m., when a brief squall appeared) and shows great extremes in all determinations. Contrasted with this are the windy days, July 13,14,15, and 16, during which the oxygen curves were very much flattened out. This shows that the oxygen content of the sea- water is somewhat influenced by the atmosphere. In figure 3 it may be observed that the oxygen content of the water north of Hatteras is increased with decreasing temperature and increasing absorption- coefficient, which is another demonstration that the oxygen content of the water is influenced by the air. On the other hand, shallow water is not nearly in equilibrium with the air in regard to oxygen. At. Pl
Size: 1628px × 1536px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcarnegie, bookcentury1900, bookdecade1900, bookyear1902
