140
Vertical Structure: Baroclinic Quasi-Geostrophic Models
1.0.-------,-------,-----.-------,
a OL---------L---------L---------~--------J
-1
-o.5
0
0.5
0.8
0.6
y/L
0.4
alpha = . 1
x/L
Fig. 3.9.la-c. Geostrophic contours in an rectangular ocean basin -L :;; X :;; L, 0 :;; y :;; L. The
forcing is given by WE= W0sin1r(yjL), and the parameter measuring the forcing is a= ;~r~.
a Geostrophic contours when a = 0.1. The entire basin is covered with geostrophic conto~rs
originating at the eastern boundary. b a= 0.3. A small pool of gestrophic contours emanting from
the western boundary has arisen. The boundary of the pool is given by the critical curve Xs(y) (plus
signs). c For a larger value of a, here equal to 1.0, the region of the pool has increased