Question 3

ta) Why might we expect a kinetic energy density spectrum derived from current measurements made in the Drake Passage, between South America and Antarctica, to show an above-average incidence ol mesoscale eddies?

(hi Figure 3.33 is such a kinelic energy densiiy spectrum. Does it in (act >how a high incidence of mesoscale eddies?

(c) Explain why ntme of the peaks on Figure 3.33 can be attributed to inertia currents.

QUESTION 3,18 Figure 3.34 show s the variability in the level ยป1 the sea-surface as computed from altimetry data, collected from the satellites TOPEX-Poseidon and ERS-2.

(a) Compare Figure 3.34 w ith Figure 3.1 What do the regions showing the greatest variability in sea-surface have in common? Can you explain this' i h f Why are I he positions of equatorial current systems not strongly visible on Figure 3,34? i Hint flunk about till the variables in the gradient equation.)

Figure 3.34 Variability in sea-surface height, as computed from satellite altimetry data. Colours represent different deviations from mean sea-level (for key, see bar along the bottom).

period (days)

deplh 1519m

Figure 3.33 Kinetic energy density spectrum for flow in the Drake Passage, between South America and Antarctica.

frequency |c,p, day)

deplh 1519m frequency |c,p, day)

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