rv 2 v// + F(x,y) $~ + G(x,y) $£- - H(x,y) = , 



where the coefficients F, G and H have been plotted as functions of 

 x and y on charts. The wind stress was computed for the month of 

 February by means of formula (33)? using the wind charts put out 

 by the Marine Branch of the Meteorological Office, Air Ministry, 

 London (194-8). 



If the subscripts j,k indicate an interior point, and the ad- 

 jacent points of the lattice are denoted by subscripts (j,k-l), 

 (j,k+l), (j-l,k), (j+l,k), respectively, the difference equation for 

 the horizontal mass transport becomes 



r ( frj,k-l + frj.M. ! fr.1+i,k + V.i-l,k - 4v h,k ) + 



d 



( V il Vi ) tQ / ^j+i,k- »j-i t k \ _ H =0 



F j,k V 2d / + G j,k \ 2d / H j,k u • 



Such a difference equation can be established for each interior 

 point. There are as many equations as interior points, and since 

 the number of interior points equals the number of unknowns, with 

 the boundary conditions, \j/ is uniquely determined in the interior 

 of the area, provided that the determinant of the system of equations 

 is unequal to zero. 



Basic data for the determination of the coefficients F, G and 

 H as functions of x and y, and the results of the numerical inte- 

 gration will be published in the next report. 



50 



