NO. 4 TEMPERATURE VARIATIONS IN THE NORTH ATLANTIC 289 



or the other of the two curves II or III (fig-. 107) for these two 

 regions, but no perfect resemblance to either of them, because they 

 are neither maximum nor minimum curves (cf. the pressure curves 

 for the United States of America, fig. 74, III, V, and perhaps also 

 for the West Indies, fig. 71, VB, VIB). The typical curves only 

 occur in or near the real centers of action.] 



The Indo-Malayan, South American type of pressure curves, evi- 

 dently characteristic for the low-pressure region of the Indian Ocean, 

 and the high-pressure regions of the South Atlantic and the South 

 Pacific Oceans, is represented by the inverted curves IV and V, 

 figure 107, for Batavia and Bombay, and the direct curves VI, VII, 

 and VIII for Santiago (Chile), Goya, and Cordoba (Argentina). 



In figure 108 similar curves from diflferent regions of the Indian 

 Ocean and the western Pacific are reproduced. No curves have 

 been inverted in this figure. These curves prove that the air pres- 

 sure fluctuates in the same manner and almost simultaneouslv over 

 the greater part of the regions surrounding the Indian Ocean, from 

 India (curves 8 and 9) and the Philippines (curve 11) in the north 

 to southern Australia in the south. The fluctuations seem as a 

 rule to occur somewhat later in southern Australia than in India 

 and the Malayan region (Batavia). The fluctuations are also con- 

 siderably greater in Australia than in the tropics to the north, 

 (cf. curves 13-15 and curve 12). 



It is noteworthy that though southern Australia is situated in- 

 side the high-pressure belt of the southern hemisphere (the mean 

 pressure of the year showing a local barometric maximum) still the 

 pressure there does not fluctuate inversely as that of the tropical 

 low-pressure belt to the north (Batavia, Bombay), but directly in 

 the same manner. 



The barometric fluctuations at Mauritius and Antananarivo 

 (Madagascar), in the western Indian Ocean (curves 2 and 3) are 

 of the same type as those of the northern and eastern Indian Ocean 

 (cf. figs. 90 and 71) and of Australia as well as o'f the Philippines, 

 but there are important dissimilarities as the curves 2 and 3 show. 

 This may be due to the fact that these stations are near to another 

 center of action. 



We do not know what the barometric fluctuations may be in the 

 region of the pressure maximum of the southern Indian Ocean ; 

 but curve i proves that at Cape Town situated in the high-pressure 

 belt, between the pressure maximum of the Indian Ocean and that 

 of the South Atlantic, the barometric fluctuations differ much from 



