Notes
Slide Show
Outline
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Chapter 6
Global Climate Systems
  • Elemental Geosystems 4e



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Climate
  • Climate is weather over time
  • Climatology is the study of climate
  • Climatic regions are areas with similar weather statistics
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Climate Components
  • Insolation
  • Temperature
  • Pressure
  • Air Masses
  • Precipitation
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Earth’s Climate System
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Worldwide Average Precipitation
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Climatic Relationships
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El Niño / La Niña
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La Niña / El Niño
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Generalized Climate Regions
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A Climate System
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Classification Categories
  • Tropical Climates
  • Mesothermal Climates
  • Microthermal Climates
  • Polar Climates
  • Highland Climates
  • Dry Arid and Semiarid Climates
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Tropical Climates
  • Tropical Rain Forest: Most near Equator, constantly wet and warm, dominated by ITCZ precip. For east side of continents, trade winds also bring moisture.
  • Tropical Monsoon: Gen. located on or near coasts, on or near large continents.  Are wet but with a dry season on 1-4 months. ITCZ and onshore flow bring moisture in high sun season, low sun season drier.  Dry season ends w/ peak temps.
  • Tropical Savanna: Located poleward of Rainforest climate zones. ITCZ brings rain for 6 months or less per year, high pressure dominates in dry season.
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Tropical Climates
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Tropical Rain Forest
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Tropical Monsoon
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Tropical Savanna
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Mesothermal Climates
  • Humid Subtropical Hot-Summer:  generally on east side of continents, either always moist or winter dry.  mT air masses dominate high sun season, with convectional precipitation, rest of year mid. lat. cyclones significant.
  • Marine West Coast:  always wet due to mid. Lat. cyclones, mild summers, cool winters with mP air dominant.  Located poleward of Mediterranean Dry-Summer Climates
  • Mediterranean Dry-Summer: winter wet, summer drier or very dry.  Coastal fogs typical in late spring through early fall.  Winter precip from mid lat cyclones, summer dry due to dominance of high pressure.
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Mesothermal Climates
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Humid Subtropical Hot-Summer
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 Marine West Coast
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 Marine West Coast
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Mediterranean Climates
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Microthermal Climates
  • Humid Continental Hot-Summer Climates:  located in equatorward of other microthermal climates
  • Humid Continental Mild-Summer Climates:  cooler than above due to being at higher latitude
  • Subarctic Climates: cooler yet due to more poleward locations than above, have thin soils due to recent glaciation, most of precip falls in high sun season.
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Microthermal Climates
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Humid Continental Hot-Summer
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Humid Continental Mild-Summer
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Subarctic
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Subarctic
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Polar Climates
  • Tundra Climate:  permafrost common.  Are in areas experiencing more climatic warming than other regions
  • Ice Cap and Ice Sheet Climates
    • Polar Marine Climate

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Polar and Highland Climates
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Dry, Arid, and Semiarid Climates
  • Desert Characteristics: precip < 50% of potential evapotranspiration
  • Low-Latitude Hot Desert Climates
  • Midlatitude Cold Desert Climates
  • Low-Latitude Hot Steppe Climates
  • Midlatitude Cold Steppe Climates
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Dry, Arid, and Semiarid Climates
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Low-Latitude Hot Desert
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Midlatitude Cold Desert
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Low-Latitude Hot Steppe
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Midlatitude Cold Steppe
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Global Climate Change
  • Global Warming
  • Climate Models and Future Temperatures
  • Consequences of Global Warming
  • Political Action to Slow Global Warming
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Global Temperatures
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1998 Temperature Anomalies
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CO2 Sources
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GCM Model
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July 2029 Temperature Forecast
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Antarctic Ice Disintegration
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End of Chapter 6
  • Elemental Geosystems 4e