no 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 70 



the other hand, in the middle fields, in the open ocean, the agree- 

 ment on the whole is extraordinarily good and without doubt shows 

 that the wind has a decisive influence on the temperature variations 

 of the water and the air. 



It is still more clearly seen that the relation between the variations 

 in the direction and strength of the air pressure gradients and the 



98 99 1900 i 



Figure 49. These curves give the same kind of mean values as in figure 48 

 but only for the four middle 10° longitude fields between 20° and 60° virest 

 longitude along the shipping route Channel to New York. 



variations in the surface and air temperatures are in agreement if 

 we examine the mean values for great regions. Figure 48 gives 

 the mean of all six 10° longitude fields along the route Channel to 

 New York. The siinilarity between the curves of the air pressure 

 gradients (B) and the curves for the temperature anomalies in the 

 ; water (W) and in the air (L) is undeniable. But particularly 



