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Weather and Climate > Exam 3 > Flashcards

Exam 3 Flashcards

Flashcards for Exam 3 4/8/14

1
Q

0/8th Cloud Coverage

A

CLR or SKC

No Clouds/Clear

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2
Q

1/8 - 2/8 Cloud Coverage

A

FEW

Few

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3
Q

3/4 - 4/8th Cloud Coverage

A

SCT

Scattered

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4
Q

5/8 - 7/8th Cloud Coverage

A

BKN

Broken

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5
Q

8/8th Cloud Coverage

A

OVC

Overcast

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6
Q

Geostationary Clouds

A

Images of same geographic area continuously

22,500 miles above the ground

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7
Q

Polar orbiting Satellites

A

Closely parallel t to the earth’s meridian lines

532 miles above the ground

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8
Q

Drizzle

A

Very small and uniformly dispersed water drops that appear to float while following air currents

Less than 0.02 Inch

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9
Q

Rain

A

Precipitation int he form of liquid water drops

Drops greater than 0.02 Inch

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10
Q

Freezing Rain

A

Rain that falls in liquid form but freezes upon impact to form a coating of glaze on the found and exposed objects

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11
Q

Freezing drizzle

A

Drizzle that falls in liquid form but freezes upon impact to form a coating of glaze

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12
Q

Ice Pellets

A

a type of cold weather precipitation consisting of transparent to translucent pellets of ice

Less than .2 Inch in diameter

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13
Q

Snow

A

Cold weather precipitation form composed of white or translucent ice crystals

Can be up to .8 inch in diameter

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14
Q

Snow intensity of based on

A

visibility

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15
Q

Hail

A

precipitation in the form of balls or irregular lumps of ice

.2 inch or greater

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16
Q

Hail is produced by what type of cloud?

A

Convective Clouds (Cumulonimbus)

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17
Q

Drizzle intensity is based on…

A

Rate of fall (accumulation)

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18
Q

Types of precipitation measurements

A

1) Standard Range gauge
2) tipping bucket Rain Gauge
3) Weighing type rain gauge

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19
Q

Most accurate Rain gauge?

A

Standard rain gauge

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20
Q

How to measure snowfall

A

Measure three places with a ruler then average the three

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21
Q

1” of liquid rainfall equals…

A

10” of snowfall

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22
Q

What is air pressure?

A

The weight of air above a given surface

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23
Q

Air pressure always _________ with height

A

decreases

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24
Q

wind blowing is caused by?

A

unequal heating of the earths surface

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25
Q

Horizontal temperature differences result in ______.

A

a horizontal difference in pressure

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26
Q

How do we measure pressure?

A

Barometers

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27
Q

Types of Barometers:

A

1) Mercurial: Mercury
- Illegal

2) Aneroid: without fluid

28
Q

Corrections for Barometer:

A

1) Temperature
2) Instruments
3) Gravity
4) Sea Level

29
Q

Atmospheric Pressure decreases _____ in. of mercury for every ____ ft. rise in altitude

A

1 inch of Mercury for each 1000 ft.

30
Q

Standard surface atmospheric pressure

A

1013.2 Millibars

1) 14.7 lbs
2) 29.92”/Mercury

31
Q

What kind of meteorological phenomenon will you find the lowest pressure?

A

Hurricanes

32
Q

In high pressure, air blows ________ in the northern hemisphere.

A

Clockwise

33
Q

In high pressure, air blows _______ in the southern hemisphere.

A

counter-clockwise

34
Q

In Low Pressure, air blows ______ in the Northern hemisphere.

A

counter-clockwise

35
Q

In low pressure, air blows _____ in the southern hemisphere.

A

clockwise

36
Q

Buys-Ballot Rule states:

A

If you stand with your back to the wind, in the northern hemisphere, your left hand will always point to low pressure and your right hand will always point to high pressure.

37
Q

850 millibar chart =

A

Approx. 4,000 feet above sea level

38
Q

700 millibar chart =

A

Approx. 9,800 feet above sea level

39
Q

500 millibar chart =

A

18,500 feet above sea level

40
Q

300 millibar chart =

A

Approx. 30,000 feet above sea level

41
Q

250 millibar chart =

A

Approx. 34,250 feet above sea level

42
Q

200 Millibar chart =

A

Approx. 38,500 feet above sea level

43
Q

Newtons 1st law of motion

A

an object at rest will remain at rest until acted on by an outside force

44
Q

Newtons 2nd law of motion

A

F=ma

45
Q

Newtons 3rd law of motion

A

For every action, there is an equal an opposite reaction

46
Q

Atmospheric forces that causes wind to blow:

A

1) Pressure gradient forces
- High vs. Low
2) Coriolis Force
3) Friction

47
Q

Coriolis Force

A

Deflection caused by a rotating object

48
Q

Coriolis Force only affects________.

A

wind direction, not speed.

49
Q

Amount of deflection in the Coriolis Force depends on…

A

1) rotation of earth
2) the latitude
3) the objects speed

50
Q

Geostrophic Wind

A

theoretical horizontal wind blowing in a straight path, parallel to the isobars/constant contour lines, at a constant speed

51
Q

Geostrophic Winds are caused by

A

exact balance of pressure gradient force and the carioles force

52
Q

Hydrostatic Balance

A

in the vertical, an exact balance between vertical pressure gradient force and gravity

53
Q

Wind is characterized by

A

1) direction
2) speed
3) gusts

54
Q

wind speed is measured by a __ average

A

2 minute

55
Q

wind gusts are

A

instantaneous

56
Q

Veering wind:

A

one that shifts clockwise

57
Q

Backing wind:

A

one that shifts counter-clockwise

58
Q

Prevailing wind is categorized by

A

direction and speed

59
Q

On an average basis in Austin, Tx where is the most common wind direction?

A

South

60
Q

Wind Vanes measure

A

direction

61
Q

Wind is measure approximately ____ Ft. above the ground

A

30

62
Q

Scales of atmospheric motion

A

1) Microscale
2) Mesoscale
3) Macroscale

63
Q

Example of Microscale

A

At DKR Stadium

64
Q

Example of Mesoscale

A

City, State

65
Q

Example of Macroscale

A

1) Syoptic (weather map) scale

2) Global Scale

66
Q

Collision (coalescence process) is the ______ temperature process.

A

Warmer

67
Q

Bergeron Process is the ______ temperature process.

A

Colder

Weather and Climate (5 decks)

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