wide area outside the wind zone, This means that when the wind blows in the 
above manner, we can expect a depression of sea level beneath the wind-swept 
. area deepening linearly toward the coast. The maximum level fall occurs 
of course along the beach. If the wind blows in the opposite direction, there 
will occur an elevation of the sen surface toward the coast. The magnitude 
of these depressions and elevations of course depends upon the ratio h/D, and 
‘LO __, the wiath of the wind zone. 
For an offshore wind blowing in such a manner that the observer looking 
towards the sea has the wind on his back, the same sort of depression takes 
place, of course, the manner of its dependence upon b/D, differing from the 
ease of longshore oak If the wind blows from the sea to land there will 
occur an elevation beneath the area swept by the wind. 
These details are illustrated by the diagrams in Figure 6. 
. 
‘VIII. Relation Between the Wind Direction and the Sea Level Change. 
The diagrams in Figure 6 give us an approximate idea of the relation= 
ship between the direction of the wind stress and the sea level change in 
a steady state. The sea level rises approximately linearly as we ace removed 
ay from the coast. No slope of the sea surface is seen outside the wind 
zone, The sea level responds to the offshore and longshore wind in different 
ways. For example, in the area of° California, a north wind lowers the sea 
Level below the wind zone and a south wind raises it. On the other hand an 
east wind raises the level and a west wind lowers it. Thus is can be con- 
eluted that for some direction of wind and for some ratio bh/Dy there will 
occur neither rise nor fall of the sea level however strong the wind my Bie. 
Such directions will be found in the sectors between north and west and Bonkh 
and east. 
On the contrary there will be a wind direction which fives a maximum 
rise or fall of the sea level. This direction mst of course depend upon 
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