Exam (elaborations)
GEOG 131 Exam 4 Questions answers latest update
- Course
- GEOG 131
- Institution
- University Of Tennessee - Knoxville
GEOG 131 Exam 4 Questions answers latest update
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GEOG 131: Exam 4What is weather? - is the short-term, day to day condition of the atmosphere; a
"snapshot" of atmospheric conditions
What is climate? - the long term average of weather conditions and extremes in a
region
What are the elements that contribute to weather? - - temperature
- air pressure
- realitive humidty
- wind speed and direction
- seasonal factors (ex. isolation, sun angle)
What are air masses? - large bodies of air with fairly uniform temperature and
moisture characteristics
How are air masses named? - named on the basis of their source region and for
whether they originate over land or sea
What makes a good source region? - 1. extensive and physically uniform area
2. general stagnation of the atmospheric circulation (air will stay over an area for
long) common in high pressure areas
,Arctic - A
Anatartic - AA
Polar - P
Tropical - T
Equitorial - E
Maritime - m- wet
Continental - c- dry
Contineal Polar (cP) - develops over the interior region of Canada and Alaska
-- cold, dry, stable, and high pressure
-- forms only in the N hemisphere
-- major player in mid and high latitude weather-lifts the warmer air and produces
condensation
-- the greater contrast in temperature between cP and warmer air masses the
more dramatic weather is produced
, Maritime Polar (mP) - two mP air masses... one in NW and one in NE of the North
american continent over the oceans
-- within mP air masses, cool, moist, unstable conditions prevail throughout the
year
-- the Aleutian and Icelandic sub-polar low-pressure cells reside within these mP
air masses, especially during winter
Maritime Tropical (mT) - two mT air masses... mT Gulf/Atlantic and mT Pacific
-- mT Gulf/Atlantic warm, very humid and very unstable- mT pacific warm, stable,
and lower in moisture and available energy
-- the western US receives lower average precipitation because of this air mass
-- subtropic highs influence these air masses
Continental Tropical (cT) - northern interior of Mexico and SW US (summer only)
-- Hot, low relative humidity, and unstable
-- rarely influences areas outside this region
Polar front - the area of contrast between the cooler air (higher latitudes) and the
warmer air (lower latitudes)
True of False: As air masses move out of their source region they slowly take on
the characteristics of the land over which they pass - true
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