G163S10L09_converge&meso

G163S10L09_converge&meso - Divergence &...

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Divergence & Convergence
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Divergence leads  to upwelling Convergence  leads to  downwelling
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Ekman Pumping Spatial wind gradient lead to convergence  This leads to vertical motions within ocean  interior Referred to as Ekman pumping
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Ekman Pumping
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Circulation Ekman pumping drives wind-driven gyre  circulation in the subtropics Convergence of surface Ekman  Create downwelling in gyre interior  The result is an anticyclonic circulation
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Circulation
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Circulation
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Circulation
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Convergence of surface Ekman  transports piles the water up Geostrophy pushes it around the circle Comparatively little water is moved by  Ekman transport  (it is a boundary layer)  Downwelling in gyre interior lowers  Circulation
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 Convergence of Ekman  transports  Downwelling  Subtropical gyres easterlies  Subarctic gyres
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Gyre Circulation & Ekman Pumping
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Light energy drives the net fixation of carbon 2   produce CO 2
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G163S10L09_converge&meso - Divergence &...

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