1327 



Aö it is the reappearance of Eastwinds above these Westwinds, 

 which was experienced in Africa as well as in Java, does not fit 

 at all with tiie theory. 



The yearly ineqnality of high Westwinds above Java renders it 

 probable that they may be an extension towards the equator of tiie 

 main Westvortex of tiie southern hemisphere, on which general 

 circulation is intense; especially in wintertime the vortex will be 

 powerful. 



For the northern hemisphere Hann, computing wintergradients 

 between the latitudes 10° and 50°, found for a height of 9 km. 

 2.04 mm. and for 15 km. 2.90 mm. (reduced to an airpiessure 

 of 760 mm.). 



Accordingly it is doubtless that in the levels of the high W-winds 

 (17 — 24 km.) gradients on the southern hemisphere are strong, 

 maintaining a mighty W-vortex. 



From the vanishing of the high W-winds above the level of 

 rh 24 km. and the appearance of the Krakatoa-wind higher up might 

 be drawn the inference, that also the W-vortex in those altitudes 

 will dwindle away. Presumably above the vortex southerly winds, 

 will be blowing which nearer to the equator will turn into the 

 stationary Krakatoa-wind. 



Such winds with a component towards the equator have already 

 been met with at very great heights in the northern hemisphere by 

 some balloonflight-observations. 



The high W-winds above Batavia also carry the air towards the 

 equator as southern components prevail strongly. The same might 

 perhaps be assumed to be the case above Afi-ica according to 

 Berson's observations. 



Consequently above the antitrade, deflux of air towards the equator 

 takes place as well in the uppertrade as in the high westwinds, 

 this in agreement with the alleged reversal of the pressure-gradients 

 in the airlayers between 15 and 19 km. 



Royal Magn. and Met. Observatory Batavia. Dec. 1917. 



91* 



