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figure 6 7 The global distribution of On. the neat flux from lite sea-surface by conduction/ convection in W rrrE, tor (a) July and (b) January Negative values (orange) indicate a gain of heat by Hie sea

QUESTION 6.3 Figures 0.7 and fi.K show the global distributions of annual mean values ot Qu and (Jy. negative values indicate a gain of heat by the sea and positive values indicate a loss of heat from the sea. To what phenomena do you ascribe the following*.'

tat The relatively high positive values of both fj„ and (J in the western ocean off Japan and off the eastern United States, in January, (hi Areas of negative (.V and relatively low positive values of Qc. in the eastern pans of the equatorial Pacific and the equatorial Atlantic.

In extremely calm conditions, processes occurring al the molecular level become relatively more important, but this rarely occurs over the ocean. In turbulent conditions, eddying parcels of air carry beat and moisture away from the sen-surface, and £>h (relating to 'sensible' heat, i.e. heat that gives rise to an increase in temperature thai can be detected or 'sensed' I and (relating to latent heal) vary together. In other words, generally speaking, under particular weather and sea conditions, the ratio QJQ< remains more or less constant. This ralio is known as Bowen's ratio, R.

(a)

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