05
10
x/o
UPPER LAYER THICKNESS, I LAYER
0.5
x/o
UPPER LAYER STREAMLINES
1.0
10~-----------------------,
05
10
x/o
UPPER LAYER THICKNESS
e
0~~-L~--~-L~--~~~~
0
05
10
x/o
LOWER LAYER STREAMLINES
10~------------------------~
~
~
0.5.----0.5
!.0
x/o
LOWER LAYER THICKNESS
to~--I
f
~
~
05
0
o
05
10
x/o
LOWER LAYER STREAMLINES
Fig. 4.9.1a-f. Solution for the two-layer model when the lower layer possesses closed potential vorticity contours.
a Upper layer thickness field when only the
upper layer is in motion, and the lower layer is chosen to be at rest. In this case the contours are also streamlines. b Upper layer thickness when the lower
layer pool is in motion with constant potential vorticity in the pool. c Lower layer thickness. The pool region is visible as the region in which the isolines of
lower layer thickness are latitude circles. d Upper layer streamlines with the lower layer in motion. Outside the pool the streamlines are as in a. e Lower layer
streamlines. The calculation is for
H
1 =
0.5H2 and
y2 =
1.25
y3 •
f
H1 =
H2 ,
i.e., the thicknessess are equal and the pool shrinks
~
0'\
~
0
Q
g,
W"
~
[
f 0
~