736 



WINDS OF THE GLOBE. 



MONSOON REGION OF SOTJTHERN ASIA. 



Further west, on the Indian Ocean, and the Bay of Bengal, the following table 

 shows the passage of the S. E. trade into the S. W. monsoon. I have given the 

 result of observations on the eastern part of the ocean between 90° and 100° in 

 percentages. 







June to August. 



December to February. 





H 





« 





^ • 



^ 





H 





W 





^ 





^" 







te 



» 



H 



CO 



m 



m is 



fc 



% 



fe 



w 



i» 



(0 



0) 



^ 



fc 



Indian Ocean aucl Bay of Bengal, bet 



90°&100°E. 







11 ii 11 



5 -10 S. 



2 



8 



20 



50 



11 



6 



2 



2 



3 



4!ll 



17 



10 



18' 21 



16 



11 II CI 



-5 S. 



7 



8 



(J 



14 



17 



20 



14 



14 



(J 



4 



3 



8 



11 



19: 28 



21 



II II II 



-5 N. 



2 



1 



1 



4 



18 



50 



18 



6 



17 



24 



10 



4 



4 



11 13 



17 



II 11 II 



5 -10 N. 







2 



0.4 



4 



24 



57 



12 



0.8 



16 



49 



15 



7 



3 



3 



0.7 



7 



(Port Blair, Andaman Islands) 



10 -15 N. 



1 











1 



7 



84 



4 



2 



10 



64 



13 



7 















6 



Bay of Bengal 



15 -20 N. 



1 















7 



80 



9 



3 



34 



33 



^ 



0.6 



3 



7 



4 



10 



Between 6°-10° S. the S. E. trade prevails yet. From 0-5° S. these S.W. winds 

 are already more frequent, which may be partly caused by the influence of Suma- 

 tra, although the S. and S. E. winds are also frequent. Between and 10° N. the 

 prevalence of S. W. is very large, but S. and W. are also well represented. North 

 of 10° N. the S. W. winds prevail nearly to the exclusion of all others. In our winter 

 the N. E. monsoon (or trade) largely prevails between 5° and 15° N. Between 0° 

 and 5° N. the number of N. E. winds has decreased one-half, while N. and N. W. 

 have increased in number, while from 0° to 10° S., west winds are the most nume- 



If we take a more westerly meridian, the result will be more clearly seen, as in 

 the next table, and also on Plates 5 and 6. 







June to August. 



December to February. 1 



Mean direction. 



Eatio of 



Mean direction. 



Eatio of 









resultant. 





resultant. 



Indian Ocean and Bay o 



f Bengal 10°-15° S., 80^-85" E. 



S. 52° E. 



.85 



S. 73i°E. 



.38 





5-10 S., 80 -85 E. 



S. G3 E. 



.62 



S. 58 W. 



.16 





-5 S., 75 -85 E. 



S. 22 E. 



.38 



N. 56 W. 



.24 





-5 N., 80 -90 E. 



S. 51 W. 



.75 



N. 30 E. 



.43 





" 5 -10 N., 80 -85 E. 



S. 58 W. 



.84 



N. 45 E. 



.59 





10 -15 N., 85 -90 E. 



S. 48 W. 



.89 



N. 50 E. 



.66 





15 -20 N., 85 -90 E. 



S. 44 W. 



.79 



N. 34 E. 



.53 



Here we have from June to August the mean direction of the wind passing from 

 S. 63° E. through S. 22° E. to S. 58° W., while farther north the mean direction 

 becomes a little more southerly, probably owing to the influence of the continent. 

 Still more regular is the passage of the N. E. trade into the N. W. monsoon of the 

 southern hemisphere. 



In the western part of the Indian Ocean, towards the coast of Africa, we have 

 the following percentages: — 



