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MET 1010: Chapter Nine

Intro to Atmosphere
The smallest scale of atmospheric motion is the:
An example of mesoscale motion is:
winds blowing through a city.
An example of microscale motion isL
winds blowing past a chimney.
Which of the following associations is most accurate?
Mesoscale- land breeze.
The slowing of the wind due to the random motion of air molecules is called:
molecular viscosity.
Thermal turbulence above the surface is usually most severe:
at the time of maximum surface heating.
On a clear, windy day, the depth to which mixing occurs above the surface depends upon:
the wind speed, surface heating, and the landscape (all of the above).
The top of the friction layer is usually found near what altitude?
1,000 meters
The friction of fluid flow is called:
Surface winds are generally strongest and most gusty:
in the afternoon.
The wind's speed generally increases with height above the earth's surface because:
friction with the earth's surface slows the air near the ground.
The howling of wind on a blustery night is believed to be caused by:
An abrupt change in wind speed or wind direction is called:
wind shear.
Violent, rotating eddies that create hazardous flying conditions beneath the crest of a mountain wave are called:
Clear Air Turbulence (CAT) can occur:
when huge eddie develop in clear air.
Which below is NOT true concerning an "air pocket?"
They often form in regions that exhibit strong vertical wind shear.
Pedaling a bicycle into a 20 knot wind will require about ______ as much effort as pedaling into a 10 knot wind.
2 times
The greatest wind speed ever recorded at the earth's surface occurred at:
200 knots (230 mph) in 1934 at Mount Washington, NH.
Clear air turbulence often occurs near a boundary of high wind shear.
The size and shape of a turbulent eddy depend on:
the size of the obstacle, the shape of the obstacle, and the speed of the wind (all of the above).
Suppose the wind speed increased from 5 mph to 10 mph. We can conclude that the force exerted by the wind increased by a factor:
If huge waves pound against the beach communities of Southern California for several days during clear, calm weather, it is a good bet that:
the winds are strong somewhere over the Pacific ocean.
Which below has the least influence on determining how high a wind wave will grow over the open ocean?
Suppose the wind speed increased from 5 mph to 25 mph. We can conclude that the force exerted by the wind increased by a factor of:
Which of the features below could indicate prevailing wind direction?
(all of the above)
Dust storms and dust devils are ______ on Mars.
A wind rose indicates:
the percentage of time that wind blows from different directions.
The most practical location for building a wind turbine would be:
regions with moderate, steady winds.
An offshore wind:
blows from land to water; also known as a land breeze.
Which below would not be considered an onshore wind?
Santa Ana wind.
A wind reported as 45° would be a wind blowing from the:
Suppose a west wind of 20 knots blows over a coastal region, which is densely covered in shrubs. If this same wind moves out over the middle of a large calm lake, its speed and direction would probably be:
greater than 20 knots and more northwesterly.
What instrument would you use for a rawinsonde observation?
Radiosonde ballon.
An instrument used to measure wind speed is called a(n):
A wind reported as 225° would be a wind blowing from the:
A wind profiler obtains wind information using:
A Doppler radar.
A wind instrument that usually consists of three or more cups:
cup anemometer.
The instrument that uses infrared or visible light in the form of a laser beam to determine wind direction is the:
Which of the instruments below indicates both wind speed and wind direction?
Which instrument only measures wind speed?
Which is NOT characteristic of a thermal low?
Becomes stronger with increasing height.
If the sea level pressure in Philadelphia, Pennsylvania is 1016 mb, the strongest summertime sea breeze along the New Jersey coast would occur when the sea level pressure just east of Atlantic City, New Jersey is:
1019 mb.
During the summer in humid climates, nighttime clouds tend to form over water during a:
land breeze.
Which below is usually NOT true concerning a sea breeze circulation?
They mainly occur at night.
A sea breeze will reverse direction and become a land breeze:
once per day.
A sea or land breeze is caused by:
differences in temperature.
The nighttime counterpart of the sea breeze circulation is called a:
land breeze.
In summer, during the passage of a sea breeze, which of the following is NOT usually observed?
A drop in relative humidity.
A smog fron is most often associated with which wind system?
Sea breeze.
A cool, summertime wind that blow from sea to land is called a:
sea breeze.
In south Florida the prevailing winds are northeasterly. Because of this, the strongest sea breeze is usually observed on Florida's ______ coast, and the strongest land breeze occurs on Florida's ______ coast.
east, west
When a sea breeze moving north meets a sea breeze moving south, the form a:
sea breeze convergence zone.
Clouds and precipitation are frequently found on the downwind side of a large lake. This would indicate that the air on the downwind side is:
converging and rising.
During the summer along the coast, a sea breeze is usually strongest and best developed:
in the afternoon.
Monsoon depressions are:
low pressure areas that enhance rainfall during the summer monsoon.
The summer monsoon in eastern and southern Asia is characterized by:
wet weather and winds blowing from sea to land.
An extremely strong downslope wind that occurs in parts of Antarctica would be considered a:
katabatic wind.
The winter monsoon in eastern and southern Asia is characterized by:
dry weather and winds blowing from land to sea.
Low pressure becomes best developed over the Asian continent in:
While fly-fishing in a mountain stream, you notice that the wind is blowing upstream. From this you could deduce that the wind is a:
valley breeze.
Cumulus clouds that appear above isolated mountain peaks are often the result of a:
valley breeze.
A valley breeze would develop its maximum strength:
in the early afternoon.
Which of the winds below is NOT considered to be a cold wind?
Santa Ana wind or Chinook wind.
A strong, usually cold, downslope wind is called a:
katabatic wind.
Which of the following is NOT a katabatic wind?
A katabatic wind on the Oregon coast would most likely blow from the:
east to west downslope.
A katabatic wind is a ______ wind.
cold, downslope
A chinook wind in the Alps is called a:
The heat from a chinook wind is generated mainly by:
compressional heating.
A chinook wall cloud is a:
bank of clouds forming over the mountains.
On the eastern side of the Rocky Mountains, chinook winds are driest when:
clouds form and precipitation falls on the upwind side of the mountain.
Chinook winds are:
warm, dry winds that descend the eastern slope of the Rocky Mountains.
The main reason Santa Ana winds are warm is because:
sinking air warms by compression.
Santa Ana winds warm by ______ as they flow down an elevated desert plateau.
The Santa Ana wind is a ______ wind that blows into southern California.
warm, dry
Strong Santa Ana winds develop in Los Angeles during the fall when a high pressure center forms to the:
northeast of Los Angeles over the Great Basin.
Which of the following would NOT be considered a "desert" wind?
A warm, dry gusty wind that blows across North Africa is the:
Which of the following conditions favors development of dust devils?
Hot, dry days.
Another name for a small, rotating whirlwind observed at the surface is:
dust devil.
A dust or sandstorm that forms along the leafing edge of a thunderstorm is a:
A northeaster along the east coast of the United States is best developed when a low pressure area:
enhances the surrounding pressure gradient.
A sea breeze is most likely to develop along a coastline when:
large temperature differences exist between the land and water.
Which of the following is a serious hazard to aircraft?
Clear air turbulence.
Good hang-gliding conditions require:
strong winds.
Strong winds blowing over vegetation results in:
brush fire.
If the wind speed doubles, the force exerted by the wind increases by a factor of:
The land/sea breeze, lake breeze, and mountain/valley breeze are examples of:
local winds.
A seiche can be caused by:
strong winds and sudden changes in atmospheric pressure or earthquakes.