I9IS.] IN AIR CIRCULATION OF THE GLOBE. 215 



velocities less than 5 m.p.s. were disregarded. The results, which 

 are set forth in Fig. 7, show that below an altitude of 1,000 

 meters the wind, usually of low velocity, is notably variable and 

 controlled by local conditions. At the level of 1,000 meters the 

 outward flowing currents make their appearance in force and con- 

 trol the circulation up to an altitude of between four and five kilo- 

 meters, above which level inward blowing currents from the south- 

 westerly quadrant are of equal frequency and of about the same 

 force as the outward blowing currents from the southeast. The 

 clockwise deviation of currents in the anticyclone lead us to suppose 

 that the outward blowing currents start from the interior in a more 

 easterly direction, and that the inward blowing currents from the 

 southwest are almost directly opposed, when they arrive in the 

 interior. 



The observations of Wegener made with kites and captive 

 balloons in northeast Greenland, were not generally carried above 

 an altitude of 2,000 meters, though in a few instances considerably 

 higher. They agree among themselves and with those from west 

 Greenland, in showing the presence of relatively variable winds up 

 to about a thousand meters altitude, where these currents are re- 

 placed by the strong winds coming down the slope of the inland-ice 

 and increasing in force and in clockwise deviation as one ascends 

 to the limits of the observations. While they are therefore of great 

 interest in revealing the strength and the upward extension of the 

 glacial anticyclone, they have less direct bearing upon the question 

 of circumpolar whirls.®^ 



With the above data of Barkow and de Ouervain before us, it 

 seems that the time has arrived for laying the specter of the circum- 

 polar whirl, and of returning to an objective basis of reasoning. 



Winds About the Margin of the Inland-Ice as a Measure of 

 THE Vigor of the Antarctic Anticyclone. 



The Zone of Control off " Wilkes Land." — The vigor of a glacial 

 anticyclone may be measured, upon the one hand, by its extension 

 upward from the glacier surface, as has been considered in the last 

 section. Upon the other hand, it may be possible to use the exten- 



''i Wegener, " Drachen- und Fesselballonaufstiege," etc., pp. 55-59- 



