Observations of the amount of ozone in the earth's atmosphere, and its relation to other geophysical conditions.—Part IV

Abstract
In the previously published papers on this subject it has been shown that there is a marked relation between the amount of ozone in the upper atmosphere and the type of atmospheric pressure distribution. By means of simultaneous observations at six stations in N. W. Europe, a fair idea of the distribution of ozone with different pressure distributions was obtained. To get further insight into this relation it was necessary to know the distribution of ozone layer the world at different times of the year. The instruments were, therefore, redistributed to get observations in widely different latitudes, and a year’s observations have been taken at these stations. While the results for one year cannot establish the annual variations with great accuracy, they are enough to show the main features, and several years’ observations would be necessary to give a greatly improved accuracy. The places where the observations have been made are as follows :─ Place. Latitude. Longitude. Arosa (Switzerland) ......................... 46° 45’ N. 9° 40’ E. Table Mountain (California) ....... 34° 22’ N. 117° 41’ W. Helwan (Egypt) ........................... 29° 50’ N. 31° 10’ E. Kodaikanal (India) ...................... 10° 10’ N. 77° 30’ E. Christchurch (New Zealand) ...... 43° 30’ S. 172° 40’ E.
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