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Weather and Climate > Exam 3 > Flashcards

Exam 3 Flashcards

Flashcards for Exam 3 4/8/14 (67 cards)

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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
Horizontal temperature differences result in ______.
a horizontal difference in pressure
26
How do we measure pressure?
Barometers
27
Types of Barometers:
1) Mercurial: Mercury - Illegal 2) Aneroid: without fluid
28
Corrections for Barometer:
1) Temperature 2) Instruments 3) Gravity 4) Sea Level
29
Atmospheric Pressure decreases _____ in. of mercury for every ____ ft. rise in altitude
1 inch of Mercury for each 1000 ft.
30
Standard surface atmospheric pressure
1013.2 Millibars 1) 14.7 lbs 2) 29.92"/Mercury
31
What kind of meteorological phenomenon will you find the lowest pressure?
Hurricanes
32
In high pressure, air blows ________ in the northern hemisphere.
Clockwise
33
In high pressure, air blows _______ in the southern hemisphere.
counter-clockwise
34
In Low Pressure, air blows ______ in the Northern hemisphere.
counter-clockwise
35
In low pressure, air blows _____ in the southern hemisphere.
clockwise
36
Buys-Ballot Rule states:
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
850 millibar chart =
Approx. 4,000 feet above sea level
38
700 millibar chart =
Approx. 9,800 feet above sea level
39
500 millibar chart =
18,500 feet above sea level
40
300 millibar chart =
Approx. 30,000 feet above sea level
41
250 millibar chart =
Approx. 34,250 feet above sea level
42
200 Millibar chart =
Approx. 38,500 feet above sea level
43
Newtons 1st law of motion
an object at rest will remain at rest until acted on by an outside force
44
Newtons 2nd law of motion
F=ma
45
Newtons 3rd law of motion
For every action, there is an equal an opposite reaction
46
Atmospheric forces that causes wind to blow:
1) Pressure gradient forces - High vs. Low 2) Coriolis Force 3) Friction
47
Coriolis Force
Deflection caused by a rotating object
48
Coriolis Force only affects________.
wind direction, not speed.
49
Amount of deflection in the Coriolis Force depends on...
1) rotation of earth 2) the latitude 3) the objects speed
50
Geostrophic Wind
theoretical horizontal wind blowing in a straight path, parallel to the isobars/constant contour lines, at a constant speed
51
Geostrophic Winds are caused by
exact balance of pressure gradient force and the carioles force
52
Hydrostatic Balance
in the vertical, an exact balance between vertical pressure gradient force and gravity
53
Wind is characterized by
1) direction 2) speed 3) gusts
54
wind speed is measured by a __ average
2 minute
55
wind gusts are
instantaneous
56
Veering wind:
one that shifts clockwise
57
Backing wind:
one that shifts counter-clockwise
58
Prevailing wind is categorized by
direction and speed
59
On an average basis in Austin, Tx where is the most common wind direction?
South
60
Wind Vanes measure
direction
61
Wind is measure approximately ____ Ft. above the ground
30
62
Scales of atmospheric motion
1) Microscale 2) Mesoscale 3) Macroscale
63
Example of Microscale
At DKR Stadium
64
Example of Mesoscale
City, State
65
Example of Macroscale
1) Syoptic (weather map) scale | 2) Global Scale
66
Collision (coalescence process) is the ______ temperature process.
Warmer
67
Bergeron Process is the ______ temperature process.
Colder

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