Seasonal stratification and the spring bloom - Introduction to the Physical and Biological Oceanography of Shelf Seas - page 188

(a)

20

T b
T s

15

10

5

200

0

-200

Φ

150

6

Heat content

100

4

50

0 2

0 150 300 450 500 750 900 1050

Time (yeardays)

(b)

20

15

10

5

200

0

-200

150

6

100

4

50

0

2

0 150 300 450 500 750 900 1050

Time (yeardays)

Figure 6.8 Annual cycles simulated by the heating-stirring model for (a) SH ¼ 3 and (b) SH ¼ 1.7
Middle panels show the net heating rate Q i (W m 2 )

1.7 m 2 s 3 ), as
shown in Fig. 6.8b . Surface and bottom temperatures are equal throughout the year
(

By contrast, consider the case when tidal stirring is strong (SH ¼

0 all year) and vary sinusoidally in response to the meteorological forcing. The
lower surface temperature, compared to Fig. 6.8a , leads to the heat loss term Q u
having far less effect on the net heat input.

F ¼