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16 Cards in this Set
- Front
- Back
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Orographic Precipitation
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when moist air reaches mountains, it is forced to move upward, it cools, and rainfall occurs on the windward side (front) of the mountain
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Convection percepitation
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results from the cooling due to the uplift of air that rises from the ground b/c its density is smaller than the density of the surrounding air
hot air near the surface has low density, so it rises, cools and condenses to a cloud |
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convective storms require...
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1. surface heating
2. atmospheric moisture |
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convectives storms occur in the...
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afternoon
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Frontal Convergence has air masses with equal...
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temp and humidty that rotate clockwise in NH about a high pressure system (anticyclone)
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Fronts
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boundaries between air masses
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cold front is ____ than warm front
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steeper
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precipitation is more intense at the...
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cold front
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occlusion
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when the cold front overtakes the warm front
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participation is generated by the _____ at the fronts
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rising of warm air
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tropical cyclones (hurricanes)
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-not associated with fronts
-form over oceans around the equator -dissipation occurs over land due to lack of moisture supply from evaporation |
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2 types of convergence
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1. frontal (extratropical in the mid latitudes)
2. non-frontal (intertropical near the equator |
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after the occulsion takes place, precipitation is generated by...
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the rising of warm air at the warm, cold, and occluded fronts
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2 types of Non-Frontal Convergence
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1. convergence at the ITCZ
2. tropical cyclones (hurricanes) |
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convergence at the ITCZ
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-Hadley cells create a convergence band near the equator
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what is converging at the ITCZ?
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large quantities of atmospheric moisture evaporated from the oceans
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