# Figures Re McCreary+Lu (1994) model

1. Functions of y alone
2. Calculations from analytic model
1. As original: y_d = 18°N
1. h (Eqs 12b, 21a, 24b)
2. h_1 (Eqs 12a, 21b, 24a)
3. h-prime =(g_12/g_23)h_1+h
4. Layer 1 u_g
5. Thicknesses at x=25° (calculated from model Eqs)   At x=30°
6. STCC strength as a function of Tau amplitude
7. STCC strength as a function of g'_12

2. Move yd to 25°N (center of the gyre)
1. h (Eqs 12b, 21a, 24b)
2. h_1 (Eqs 12a, 21b, 24a)
3. h-prime =(g_12/g_23)h_1+h
4. Layer 1 u_g   "Southern hemisphere"
5. Transports: u_g_1*h_1   u_g_2*h_2   u_g_1*h_1+u_g_2*h_2
6. Thicknesses at x=25°
7. ug_1,2 at x=25°
8. ug_2,2 at x=18°

3. Move yd to 37.5°N (h_1 spans entire gyre)
1. h (Eqs 12b, 21a, 24b)
2. h_1 (Eqs 12a, 21b, 24a)
3. h-prime =(g_12/g_23)h_1+h
4. Layer 1 u_g
5. Shear (ug1-ug2)
6. Transports: u_g_1*h_1   u_g_2*h_2   u_g_1*h_1+u_g_2*h_2
7. Thicknesses at x=25°
8. ug_1,2 at x=25°
9. Situation along the western boundary (show tilt of bifurcation)

4. Add ITCZ winds (tropical gyre) (yd = 37.5°N: h_1 spans entire gyre)
1. Winds and Curl with mu=0.25 in McCLu eq (9)
2. Sverdrup streamfunction
3. h (Eqs 12b, 21a, 24b)
4. h_1 (Eqs 12a, 21b, 24a)
5. h-prime =(g_12/g_23)h_1+h
6. Layer 1 u_g
7. (Total) Transport vectors: u_1*h_1   u_2*h_2
8. Thicknesses at x=25°
9. ug_1,2 at x=25°
10. Situation along the western boundary

3. Figures from Levitus
1. Ways to demonstrate the STCC
1. Surface u_g. Overlay STCC (?) axes
2. Eastward over westward velocity    Better version from CARS rel 1500m   Indian Ocean
3. Mins/maxs of surface u_g
4. An index of 2nd mode influence:
u(0-200m)-u(400-600m) if u(0-200m) is negative
Where this index is positive it indicates positive shear above the SEC.
(Only relevant outside the equatorial zone: 10°S-10°N)
1. Levitus Pacific
2. SW Pacific only: Levitus   CARS
2. Meridional sections of temperature and u_g
3. Meridional sections of Sigma-theta and u_g (extend to 60°N/S)

4. Schematic diagrams of the gyre (UW PO talk April 09)
1. Map and (y,z) section showing STCC (pdf)     (gif)
2. Layer 1 and 2 circulations (overlay Sverdrup) (pdf)     (gif)