Figures Re McCreary+Lu (1994) model

  1. Functions of y alone
    1. Tau-x
    2. Curl(Tau)
    3. d(Curl(Tau))/dy
    4. Curl(Tau/f)
    5. Ekman transport
  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
      1. 150°E (Northern Hemis only)
      2. 180° (Northern Hemis only)
      3. 170°E (Southern hemis only)
      4. 150°W (Southern hemis only)
    3. Meridional sections of Sigma-theta and u_g (extend to 60°N/S)
      1. 150°E
      2. 163°E
      3. 170°E
      4. 180°
      5. 160°W
      6. 140°W
      7. 120°W

  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)
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