Course review

2.4 Climate and biomes

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Learning objective

2.4.1—Climate vs. weather

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• Climate: atmospheric conditions over long periods (~30 years) • Weather: short-term conditions

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Learning objective

2.4.2—Biome definition

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• Group of comparable ecosystems in similar climatic conditions • Influenced by precipitation, temperature, insolation

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Learning objective

2.4.3—Biome distribution determinants

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• Abiotic factors • Temperature and rainfall patterns determine ecosystem type

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Learning objective

2.4.4—Biome categories

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• Freshwater, marine, forest, grassland, desert, tundra • Each has characteristic limiting factors, productivity, diversity

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Learning objective

2.4.5—Tricellular model

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• Explains atmospheric circulation • Distribution of precipitation and temperature by latitude • Three cells: Hadley, Ferrel, polar

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Learning objective

2.4.6—Ocean heat distribution

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• Oceans absorb solar radiation • Ocean currents distribute heat globally

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Learning objective

2.4.7—Global warming effects

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• Changing climates and biome shifts • General trend: poleward and higher altitude movement

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