General Ecology_Mahaffy_Date_021810_

General Ecology_Mahaffy_Date_021810_ - Global Climates...

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Global Climates continued Seasonal variation Result of movement of solar equator Affects precipitation patterns Temperate lake cycle Thermal stratification: thermocline Winter Bottom of lake has low oxygen levels Middle of lake has high oxygen levels Top of lake has medium oxygen levels Spring Layers are mixed and the water has equal levels of oxygen at all depths Summer Bottom of lake cold, low oxygen levels Middle is the thermocline which is where the temperature rapidly decreases Top of the lake is warm, high oxygen levels Fall Layers are mixed and the water has equal levels of oxygen at all depths ENSO (ocean current) Other long term variations as well such as: NAO: North Atlantic oscillation PDO: Pacific Decadal oscillation Interact with each other to intensify or decrease effects Biomes Biomes Depend on climate Temperature and ppt (atmospheric pressure) Also on disturbances Topography and soil type etc
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General Ecology_Mahaffy_Date_021810_ - Global Climates...

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