Geog12U3

Geography
Stratosphere
layer of the atmosphere in which commercial airliners take advantage of fast moving upper atmosphere air to save fuel as they fly west to east
nimbostratus
a low lying layered cloud along a warm front, which produces steady precipitation for an extended period
advection
type of fog that frequently forms over cold surfaces such as oceans, as warm moist air moving across the water is rapidly cooled causing water vapour to condense
front
name given to the leading edge of an advancing air mass
westerlies
winds from the Pacific in mid-latitudes
aspect
compass direction in which a slope faces
occluded
a front in which the weather system dies out as a result of a fast moving cold front that overtakes a slower moving warm front mixing the cold and warm air
insolation
Incoming solar radiation from the sun
windward
the wet side of a mountain range
troposphere
turbulent layer of the atmosphere which contains wind, rain, and clouds
cumulus
a puffy, white, fair weather cloud
isobars
lines that join areas of equal air pressure
tornadoes
the most violent of all storms with wind speeds reaching 500 kilometers per hour
relative humidity
the percentage of water vapour in the air
oxygen
a gas which makes up 21% of the atmosphere
evaporation
process by which water vapour enters the atmosphere
maritime polar
the air mass which is responsible for bringing, cool, moist, and unstable conditions to British Columbia much of the year
nitrogen
a gas which makes up 78% of our atmosphere
radiation
fog that often forms in low lying valleys on cloudless and windless nights in fall and spring
cirrus
a high cloud that consists of ice crystals, signals an approaching warm front and will not produce precipitation
cumulonimbus
a vertical cloud associated with thunder, lightning, hail and heavy rain
albedo
term given to the percentage of solar radiation reflected back into space
continental polar
an cold, stable, dry air mass which originates in high latitudes and flows south through the interior of North America
ozone
layer in the atmosphere which protects humans and other life forms on earth from harmful ultraviolet radiation
carbon dioxide
the burning of fossil fuels has increased the levels of this gas in the atmosphere to the highest level in over 400,000 years
chinook
Warm wind moving down the leeward side of the Rockies which affects the city of Calgary
Gulf Stream
warm ocean current which begins in the Gulf of Mexico and the Caribbean and moves north along the eastern coast of North America

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