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107 Cards in this Set

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_____ humidity is a bad indicator of the actual amount of water vapor in the air.
Relative
If a bubble of air is forced to rise, and if the bubble is warmer than the surrounding air, the bubble in considered _____
Unstable
An instrument that measures humidity is called a(n)____
Psychrometer and Hygrometer
On a clear sunny day, when the wind is light, the stability of the air will most likely be ____
Stable
A desert can be found on the _____ side of a mountain.
Leeward
The clouds that are made up of ice crystal and are very high in the sky are called ____
Cirrus
The precipitation forming process that gives us most of our precipitation throughout the year is ________.
Warm cloud precess and Bergeron process
Which stable/unstable process is often associate with thunder snows?
Conditionally unstable
The actual lapse rate of the air is called the _____ lapse rate
Enviromental
The type of precipitation that falls and freezes on contact with the ground is called.
Freezing rain
When warm air moves over a cold snow surface the resulting weather is usually_____
Fog
The type of precipitation that occurs during the growing season, and is most damaging to crops is _____
Hail
The prefix for a middle height cloud is called _____
Alto
A desert found on the downwind side of mountains is called a ______
Rainshadow desert
Vapor pressure is:
The part of atmospheric pressure due to water vapor
The effect of humidity and high temperatures is expressed as a ____
Heat index
A process in which no energy is added or removed form the system is called _____
Adiabatic
Water vapor forms onto solid particles in the air. These solid particles are called:
Condensation Nuclei
The major source of humidity and precipitation in the eastern half of the US is ______
The Gulf of Mexico
The type of fog caused by your breath on a cold day would be considered:
Steam fog
Which lifting mechanism is caused by air running into a mountain?
Orographic
An instrument that uses lasers to measure cloud coverage at different heights is called:
Ceilometer
Which cloud is associated with severe updrafts and downdrafts and is often called a "thunderhead"?
Cumulonimbus
A situation in which the temperature increases with altitude is called ____
Inversion
An air parcel ______ when it is warmer than the surrounding air and it _____ when it is cooler than the surrounding air.
Rises; Sinks
When the ELR is greater than both the dry and wet adiabatic lapse rates for a rising air parcel, then the air is considered:
Absolutely unstable
At what time of day does an inversion usually begin in the lower levels of the atmosphere?
Sunset
When droplets combine to form a single, larger droplet, the process is called _____
Coalescence
Which precipitation process is responsible for producing rain in tropical regions?
Collision coalescence
Which form of precipitation is associated with black ice?
Freezing rain
The terminal velocity of an object depends primarily upon the object's:
Size
Cloud droplets fall slowly because they are:
Samll
The process by which supercooled water droplets freeze onto falling ice crystals is called:
Riming
When a lifted air parcel neither sinks nor rises is it:
Neutral
____ air can result in tornadoes and hail
Unstable
_____ air produces severed rising motions
Unstable
___________ air is associated with strong temperature inversions
Stable
The movement of water between and within the atmosphere and the Earth can be described as the _____ cycle.
Hydrologic
When making air rise, the height at which condensation occurs is called the _____
LCL
An abundance of precipitation usually falls on the upwind side of the mountain called the ______ side
Windward
When a falling rain drop reaches a constant speed, it is said to have reached a ____velocity
Terminal
The instrument used to measure liquid rainfall reaching the ground is called a ____
Rain guage
Scientists attempt to make a cloud produce rain or snow with a process called ____
Cloud seeding
Rain that falls from a cloud, passes through a cold layer, and freezes into ice pellets is known as _____
Sleet
The gas that constitutes about 78% of all the gases in Earth's atmosphere is called ____
Nitrogen
As you increase in altitude, the pressure in the atmosphere ______
Decreases logarithmically
Incoming solar radiation is often referred to as:
Insolation
The higher the Sun's alt, the the ____
More direct the Sun's rays
The date of the vernal equinox in the Northern Hemisphere is:
March 21st
The latitude of the Arctic Circle is:
66.5 degrees N
The Earth reflects about 30% of the Sun's rays that come into the atmosphere, this reflection is termed:
Albedo
Which method of light scattering primarily affects shorter wavelength radiation?
Rayleigh Scattering
Net radiation is:
Defined as the difference between absorbed and emitted radiation.
Most of the energy emitted by the Earth is in the form of _____ radiation
Longwave
______ force creates the wind and always points from high to low pressure.
Pressure gradient
In the Northern Hemisphere, winds associated with a high pressure system blow _____
Clockwise outwards from the center
What instrument is used to measure air pressure?
Mercurial barometer
If stormy weather were approaching the pressure tendency would probably be
Falling
Which instrument measures wind direction and speed at the same time.
Aerovane
A trough in the upper atmosphere is usually associated with a _____ pressure system.
Low
On March 21st, an observer at the S. Pole would see the Sun at noon:
On the horizon
On June 21st, an observer at 23.5 N would see the Sun at noon:
At the zenith
On June 21st, an observer at the Arctic Circle would see the Sun at noon:
At the alt of ~47 about the S point
___________ air needs the parcel to reach saturation before air can freely rise
Conditionally unstable
1800 UTC corresponds to ____ central standard time
Noon
2135 Z corresponds to ____ central standard time
3:35 PM
0041 Z corresponds to ____ central standard time
6:41 PM
The front which is often associated with severe thunderstorms is a:
Cold front
The front with the steepest slope is a:
Cold front
The slowest moving frontal zone is a:
Stationary front
Lake effect snow is associated with which air mass:
Continental Pacific
The global pressure zone that produces abundant precip and warm temps is the:
Equatorial Low
Fast moving currents of air found near the top of the troposphere are called:
Jet streams
If an observer witnesses cirrus clouds, followed by cirrostratus, and then altostratus, then a _____ front must be approaching
Warm
An air mass originating over the Gulf of Mexico would be considered:
Maritime Tropical
Which air mass may produce an occasional "Nor'easter" in the winter?
Maritime Pacific
Usually, ______ produce several hours of moderate to gentle precipitation over a large region.
Warm
Which is considered to be a boundary between two different air masses?
Warm and Cold fronts
An mP air mass is:
Humid and Cold
A Santa Ana or Chinook wind is a:
Very dry, warm wind flowing down a mountain slope.
When a cold front catches up to and overtakes a warm front the resulting merger creates:
An occluded front
A sea breeze usually originates during the:
Day and flows toward the land
Sea breezes usually don't occur during the winter because:
The land is usually colder than the surrounding water during winter
When the wind flows basically from west to east with no real prominent rossby waves indicated on the map, the general flow is though of as:
Zonal
The Bermuda High is an example of a:
Semi-permanent cell
The polar front is usually located near the location of which pressure zone:
Subpolar low
The ITCZ would be recongnizable on a satellite map of the globe by observing a zone of:
Clouds and precip near the equator
When heigh lines on a 500 mb map rise towards the poles during a meridional pattern, these ripples can be thought of as:
Ridges
In some global locations, it rains for months at a time and then it stops raining for months at a time due to a reversal of the wind regime. These rainy periods are called:
Monsoons
When air flows up a mountain slope created by pressure differences this is called a _____ breeze
Land
An air mass is best defined as a large body of air:
With similar temperatures and moisture characteristics
The dew point is most likely to be highest in a ____ air mass
Maritime Tropical
Warm air flowing upward along the boundary between a warm and cold front leading to extensive cloud cover is referred to as:
Overrunning
Drylines are best describes as boundaries separating:
Humid air from dry air
The numerical pressure difference between Darwin and Tahiti is indexed by the:
Souther Oscillation
During an El Nino event, the equitorial ocean temperatures in the Eastern Pacific:
Are much warmer than normal
Maps of the global distribution of 500 mb heights show lower values at the pole, which is due primarily to:
Lower temps at the pole
Usually the pressure gradient force would be strongest at the:
700 mb level
The warm ocean current located adjacent to the East coast of the US is called:
Gulf Stream
The fastest moving front:
Cold
The front associated with squall lines:
Cold
The front that produces the same weather over a long period:
Stationary
The front that is usually preceded by high cirrus clouds
Warm
The boundary between two differing air masses is called a ____
Front
Another name for the sub polar low is the ________
Polar front
A ridge is considered ___ pressure
high
Cold, dense air flowing down a mountain slope is called a ______ wind
Katabatic