PowerPoint Presentation Chapter12Midlatitude Climates - PowerPoint PPT Presentation

Title: PowerPoint Presentation Chapter12Midlatitude Climates


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Chapter 12- Mid latitude climates seasonal
temperature change greater than diurnal temp
change I.e., winter to summer temp change is
greater than daily min and max temperature
ranges Two major source regions of contrasting
air polar high cold subtropical high cold
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Mid latitude Temperature range
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Circulation is dominated by Westerlies- eastward
motion associated with subtropical jet and polar
jet Rossby waves- undulations in jetstream that
enable airmass interaction Temperature is
controlled by Insolation - higher in latitude
the longer the daylight during summer Airmass
origination- where the air gets its
characteristics
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Wet all year (Dfa) Winter dry (Dfb) Summer
dry (BWk)
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Most climate categories have several
subcategories Cf ---gt has Cfa, Cfb, Cfc, etc.
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Wet climates (no dry season) Climates dominated
by sub-polar low pressure and frontal generated
precipitation mid latitude cyclonic
storms Typically located on the southeastern side
of continents in Northern Hemisphere Cfa, Cfb,
Cfc climate classifications Df climates in
lower latitudes
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Winter dry climates (summer wet) Generally
located in continental interiors loses effect of
moisture from distant oceans during colder
months e.g., northern Great Plains
Mongolia Typically has extreme seasonal
temperature ranges- related to lack of moisture
lat
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Continentality- a measure of influence of
continental influence on moisture and temperature
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• Summer dry climates (winter wet)
• Csa, Csb climates- commonly called a
  Mediterranean Climate as that region experiences
  this kind of climate
• also occurs along western margins of continents
  at higher latitudes
• effects of oceans strongly influences climates
• Locations California, southern Australia, and
  near the Mediterranean sea

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