on balance, what are the projections for ocean change?
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On balance, what are the projections for ocean change?. It depends . . . How much warming and what feedbacks? Warming projections: Intergovernmental Panel on Climate Change 2.7 to 3.3 K to 2100 Feedbacks are studied with “General Circulation Models”. Data acquisition. - PowerPoint PPT PresentationTRANSCRIPT
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On balance, what are the projections for ocean change? It depends . . . How much warming and what
feedbacks? Warming projections:
Intergovernmental Panel on Climate Change
2.7 to 3.3 K to 2100 Feedbacks are studied with
“General Circulation Models”
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Data acquisition
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Changes in temperature
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Changes in sea level
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Historical change in salinity
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Current model projections Thermal expansion contributes major sea
level increase, but not as much as adding freshwater
Glacial melt could contribute 130 – 160 mm increase
Antarctic ice cap melting offset by increased precipitation
Redistribution of Antarctic sea ice (melting) increases equatorial & northern sea level through gravity effect
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Mammals 'floated to Madagascar' By Mark Kinver Science and environment reporter, BBC News
The ancestors of the current mammals found on the island of Madagascar could have been transported on floating vegetation from Africa, a study says.
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Climate is influenced by global winds and ocean currents
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Global WindsGlobal Winds from Satellite Data
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Coriolis Effect Based on the rotation of a sphere (the
Earth) Illustration Influences the rotation of eddies at
intermediate scales Influences the rotation of gyres at the
scale of ocean basins
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Northeastern Pacific Wind Pattern
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Southeast Pacific Wind Pattern
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Winds link land & oceans
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surface water currents
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link between surface and deep circulation
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Coriolis effect influences deep circulation
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Equatorial upwelling
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Current direction varies with depth
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Current patterns differ among ocean basins
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Indian Ocean
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Biological productivity is influenced by ocean currents