GG101 Lecture Notes - Azores High, Subtropics, Westerlies

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5 Mar 2013
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GG 101 Week 8 lecture 1
3) Climate Classification
Classification is normally done on the basis of temperature and or moisture
(precipitation)
o strong impact on vegetation, soils, hydrology, etc (logical way to assess climate
patterns)
Analyzing Global Precipitation
Wet Equatorial Belt
o Influenced by warmer air masses, high humidity values associated with them
o Maritime situation: equatorial maritime air masses
o Affected by ITCZ
Trade Wind Coasts
o Latitudes in the tropics
o Where wind blows onshore in a consistent way it causes humidity/precipitation
Tropical Wet-Dry (Monsoons and Savanna)
o Wet and dry season due to trough of the pressure
o When far moved from the sights, have high air pressure conditions, clear skies,
less precipitation
Tropical Deserts
o Largest deserts in the world are in subtropics
o Lots of high air pressure in subtropics - descending columns of air
Mid Latitude Deserts (Steppe)
Moist Subtropical (humid subtropics)
o high air pressure called Bermuda High
Mid Latitude West Coast (marine)
o warm/mild air masses coming in from westerlies and expanding onto mountain
areas
Arctic and Polar Deserts
o Little precipitation because of high air pressure
o Cold air masses
Classification System (know major breakdowns,1st level of detail, read textbook)
Tropical Climates
Dry and Semi-Arid Climates
Mesothermal Climates
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Document Summary

Classification is normally done on the basis of temperature and or moisture (precipitation: strong impact on vegetation, soils, hydrology, etc (logical way to assess climate patterns) Wet equatorial belt: influenced by warmer air masses, high humidity values associated with them, maritime situation: equatorial maritime air masses, affected by itcz. Trade wind coasts: latitudes in the tropics, where wind blows onshore in a consistent way it causes humidity/precipitation. Tropical wet-dry (monsoons and savanna: wet and dry season due to trough of the pressure, when far moved from the sights, have high air pressure conditions, clear skies, less precipitation. Tropical deserts: largest deserts in the world are in subtropics, lots of high air pressure in subtropics - descending columns of air. Moist subtropical (humid subtropics: high air pressure called bermuda high. Mid latitude west coast (marine: warm/mild air masses coming in from westerlies and expanding onto mountain areas. Arctic and polar deserts: little precipitation because of high air pressure, cold air masses.

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