Meteorology FG 1

Question 1

Acid Precipitation

Answer 1

Rain or snow with a pH value lower than 5.6.

Question 2

Adiabatic Temperature change

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Answer 2

The cooling or warming of air caused by expansion or contraction. The rate of temperature change in saturated air (wet adiabatic rate) is always less than the rate of change in dry air. (dry adiabatic rate)

Question 3

Advection

Answer 3

Horizontal movement of any atmospheric element: air, moisture, or heat.

Question 4

Air Mass

Answer 4

An extensive body of air whose horizontal distribution of temperature and moisture is nearly uniform.

Question 5

Airstream

Answer 5

A substantial body of air with the same properties flowing along with the general circulation.

Question 6

Alaskan Winds

Answer 6

Winds blowing down Alaskan valleys. They have local names. pg. 627.

Question 7

Alberta Clipper

Answer 7

A small, fast-moving cyclonic storm that forms on the Pacific front, usually over the Rocky Mountains of Alberta, Canada, and travels southeast into the Great Plains; it is followed by an outbreak of cold polar air.

Question 8

Aleutian Low

Answer 8

A low- pressure center, usually located south of or over the Aleutian Islands of Alaska, that forms one of the major centers of action in the air circulation of the Northern Hemisphere. Here temperature and polar wins meet and low-pressure systems generate or rejuvenate.

Question 9

Anti-cyclone

Answer 9

An area of high atmospheric pressure characterized by a center of maximum pressure and outflowing winds blowing clockwise. Also called a high- pressure system or a high.

Question 10

Aphelion (uhfeelee*uhn)

Answer 10

The point in the orbit of a planet that is farthest from the sun.

Question 11

Artic air

Answer 11

An air mass that has been conditioned over high latitudes. Artic air is colder and drier than polar air.

Question 12

Artic front

Answer 12

The leading edge of artic air in northern latitudes where it meets polar air or modified tropical air from the south.

Question 13

Artic sea smoke

Answer 13

Steam fog rising from a body of unfrozen water as a result of very cold air passing over it.

Question 14

Atmospheric pressure

Answer 14

The weight per unit of the total mass of air above a given point. Also called barometric pressure.

Question 15

Azores- Bermuda High

Answer 15

A semi-permanent high-pressure area in the north Atlantic Ocean that migrates east and west with varying central pressure. In summertime it causes a southerly circulation over the Atlantic states, bringing heat and humidity northward.