Download e-book for kindle: The Observations and Photochemistry of Atmospheric Ozone and by Richard A Craig

By Richard A Craig

ISBN-10: 1935704885

ISBN-13: 9781935704881

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Extra info for The Observations and Photochemistry of Atmospheric Ozone and their Meteorological Significance

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Air parcels in the lower stratosphere flowing downstream from ridge to trough undergo subsidence and horizontal convergence with a resulting increase of ozone in any given column. This effect is a maximum at the upper trough to the west of the surface center. Moreover, these air parcels come from the north and the ozone excess is increased by an advective effect. After passing through the trough, the air parcels move northward, rise, and diverge, giving a minimum of ozone when they reach the upper-level ridge.

30 METEOROLOGICAL MONOGRAPHS of information comes from the meteor studies of Whipple (1943). Later studies of the data by Whipple, Jacchia, and Kopal (1949) indicate that at 75 km near 40°N the density is some two to three times as great in summer than it is in winter. Since there is little difference in density at 30 km, this fact indicates a higher mean temperature in summer between 30 and 75 km. The temperature distributions chosen for 45°N and illustrated in fig. 18 follow the form of the standard distribution above 30 km (changes in lapse rate are at the same levels) and are consistent with both Gowan's and Whipple's findings.

262 em. The comparison, then, indicates that, according to photochemical-equilibrium conditions, there should be somewhat more ozone, perhaps 10 per cent, at the equator in summer than at 45°N in summer. Observations show just the opposite. The results of this section indicate that for temperatures which may exist in the upper atmosphere the temperature dependence of k 1dk 13 is not the cause of the observed seasonal and latitudinal variations of the total amount of ozone. This does not mean that it may nQt be a contributing cause.

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The Observations and Photochemistry of Atmospheric Ozone and their Meteorological Significance by Richard A Craig


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