1Learning objective
2.4.1—Climate vs. weather
New• Climate: atmospheric conditions over long periods (~30 years)
• Weather: short-term conditions
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2Learning objective
2.4.2—Biome definition
New• Group of comparable ecosystems in similar climatic conditions
• Influenced by precipitation, temperature, insolation
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3Learning objective
2.4.3—Biome distribution determinants
New• Abiotic factors
• Temperature and rainfall patterns determine ecosystem type
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4Learning objective
2.4.4—Biome categories
New• Freshwater, marine, forest, grassland, desert, tundra
• Each has characteristic limiting factors, productivity, diversity
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5Learning objective
2.4.5—Tricellular model
New• Explains atmospheric circulation
• Distribution of precipitation and temperature by latitude
• Three cells: Hadley, Ferrel, polar
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6Learning objective
2.4.6—Ocean heat distribution
New• Oceans absorb solar radiation
• Ocean currents distribute heat globally
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7Learning objective
2.4.7—Global warming effects
New• Changing climates and biome shifts
• General trend: poleward and higher altitude movement
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8Learning objective
2.4.8 (HL)—Climate type patterns
New• Tropical (seasonal and equatorial)
• Temperate (maritime and continental)
• Polar
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9Learning objective
2.4.9 (HL)—Secondary influences
New• Temperature/rainfall pattern may not determine biome
• Human interventions, local conditions affect development
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10Learning objective
2.4.10 (HL)—ENSO cycle
New• El Niño Southern Oscillation
• Fluctuation in wind and sea surface temperatures (tropical Pacific)
• El Niño and La Niña: opposite extreme states
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11Learning objective
2.4.11 (HL)—ENSO mechanisms
New• El Niño: weakened Walker circulation, decreased upwelling
• La Niña: strengthened Walker circulation
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12Learning objective
2.4.12 (HL)—Tropical cyclones
New• Low-pressure systems with strong winds
• Hurricanes/typhoons: sustained winds > 119 km/hr
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13Learning objective
2.4.13 (HL)—Global warming and cyclones
New• Rising ocean temperatures increase intensity and frequency
• Warmer water and air have more energy
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