TABLE 2 (continued) 



Variab le 



Unit 



Description 



STs/ay 



deg It-I 

 deg f+-1 



Components of irionthly mean sea-surface 

 temperature grad i eni- t 





deg ft-1 

 deg ft-1 



Components of mean virtual 7Q0-1000-mb 

 temperature gradient J 





ft sec-1 

 ft sec-1 



lOOO^mb geostrophic-wind components*tt: 

 Vg = gf-1 k X Vp Z100O 



"gr 

 ^gr 



ft sec-1 

 ft sec-1 



1000-mb gradient-wind components*tJ: 

 Knf-1 V|r + Vg^ - Vg = 



VAZ 



ft. sec-1 

 ft sec-1 



1000-mb isal lobaric-wlnd components* fj: 



V/^ = -gf-2 Vp (dZiooo/St) 



Vg 



ft sec-1 



Geostrophic wind speed t 



Vgr 



ft sec-1 



Gradient wind speed t 



Vaz 



ft sec-1 



Isalfobaric wind speed f 



I^hTsI 



-F ft-1 



Montiijy mean sea-surface temperature gradient! 



IVmoI 



°F ft-1 



Gradient of mean virtual temperature in the 

 700-1 OOO-mb 1 avert 



i 



ft^ sec-2 



t 



^Ir 



ft2 sec-2 



t 



VglOOO • "^p^lOOO 



sec-2 



1000-mb advection of vorticity by geostrophic wind*tt 



Vgyoo • ^p^yoo 



sec-2 



700-mb advection of vorticity by geostrophic wind*tt 



_ VglOOO • '^H^s 



°F sec-1 



Advection of monthly mean sea-surface temperature by 

 1000-mb geostrophic wind*tt 



Vg • "^pTy-io 



°F sec-1 



Advection of mean 7OO- 1000-mb temperature by the mean 

 700-1 OOO-mb geostroptiic wind* ft 



kh 



ft-1 



ft-2 

 ft- 3 



Curvature of the 1000-mb height contourstj: 



a2z[az\2 ^ ^z /'dz\2 az sz a2z 



^W ^ V5x/ 5x 5v dxdy 



""" [(IMDT 



Kr V|r f-^ 



ft sec-1 



Cyclostrophic term of gradient-wind pquation*tt 



k. (VhTs X VpTy-io) 



(•F)2 ft-2 



A stability parameter ft 



*f = Coriol is parameter = 212 sin 0. 



tAII space derivatives are computed by centered finite-difference approximations over 2 

 grid intervals. 



tAjl vector components are referred to the earth's geographical coordinate system; x is 

 positive eastward and y is positive northward. 



