meteorology Flashcards

1
Q

what is 78% of the atmospheric composition

A

nitrogen

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2
Q

what is 21% of the atmospheric composition

A

oxygen

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3
Q

what is almost 1% of the atmospheric composition

A

argon and carbon dioxide

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4
Q

what percent of the atmosphere is within 32km

A

99%

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5
Q

what percent of weight is in the first 5.5km of the atmosphere

A

50%

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6
Q
lowest layer 
thickness depends on latitude
18km thick at equator
8km thick at poles
weather occurs here 
ends at tropopause
A

troposphere

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7
Q
second layer
clear and dry 
moisture is unable to rise beyond the tropopause 
ozone layer is in this layer 
ends at stratopause
A

stratosphere

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8
Q

third layer
very little atmosphere
ends at mesopause

A

mesosphere

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9
Q
top layer
very thin
contains a small amount of oxygen and nitrogen
ionosphere
auroras form here 
radio waves are reflected
A

thermosphere

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10
Q

air is highly ionized

A

ionsphere

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11
Q

solar wind interacts with magnetic fields

A

auroras

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12
Q

protects us from UV radiation
changes thickness due to pollution
located in stratosphere
90% located between 10-50km above earths surface

A

ozone layer

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13
Q

aerosol cans, hair spray, etc
Montreal protocol
banned use in most countries
thinnest over South Pole

A

CFC- chlorinated fluorocarbons

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14
Q

list the dangers of CFC

A

increase in UV radiation at earths surface
results in an increased risk of skin cancer
increase damage to crops

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15
Q

List the primary greenhouse gases causing global warming

A
water vapor
Carbon dioxide
methane 
nitrous oxide
HFC
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16
Q

which greenhouse gas is causing the biggest issue

A

Carbon dioxide

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17
Q

daily changes

A

weather

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18
Q

historical changes

A

climate

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19
Q

changes seen in meteorological records that deviate from the historical norms

currently temps are rising faster than ever before

A

climate change

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20
Q

when carbon goes up..

A

so does the temp

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21
Q

why is the temp rising

A

Carbon dioxide released into the atmosphere

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22
Q

temp decreases with what in the troposphere

A

height

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23
Q

what influences temperatures

A
uneven heating of the earths surface 
water vs land
day vs night 
equator vs poles 
earths tilt
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24
Q

land heats faster than water and..

A

cools faster than water

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25
water heats slowly but...
remains warm longer
26
warmest part of the day is...
early afternoon
27
coolest part of the day is...
just before dawn
28
absorbed heat radiates where
into space
29
what receives the most direct sunlight
equator
30
where receives the least sunlight
the poles
31
during our winter do we receive more or less sunlight
less
32
weight of the atmosphere measured in millibars or inches of mercury barometer is the device used to measure this
air pressure
33
the most atmosphere
sea level
34
how does air pressure change
altitude air expands with height expansion leads to less dense air
35
meteorologists use a formula to ..
correct for altitude
36
what causes changes in density
the temperature of the air and moisture content of the air | caused by uneven heating
37
what causes wind
pressure
38
differences in pressure are caused by...
uneven heating of earths surface
39
if the esrth did not rotate, the earth would have winds that simply flowed from the poles to the equator winds from high pressure (the poles) to low pressure (the equator)
wind belts
40
apparent force caused by the earths rotation winds are deflected or turned to the right in the northern hemisphere winds are turned to the left in the Southern Hemisphere
Coriolis effect
41
narrow, fast-moving "river" of air near the tropopause about 200mph pulls or pushes air masses "steers" our weather
jet stream
42
less than 0° C or 32° F
ice
43
between 0 and 100° C or 32-212° F
water
44
over 100° C or 212° F
water vapor (gas)
45
energy is released into the environment
heating effect
46
liquid to solid
freezing
47
gas to liquid
condensation
48
gas to solid
deposition
49
energy is taken from the environment
cooling effect
50
liquid to gas
evaporation
51
solid to gas
sublimation
52
the amount of water vapor that has been evaporated
moisture content
53
dry air has..
low moisture content
54
moisture content is measured by...
specific humidity relative humidity Dew point
55
actual amount of water vapor | measured in grams of water
specific humidity
56
increases the AVC
evaporation
57
decreases the AVC
condensation
58
describes how much moisture the air can potentially absorb dependent on the temp of the air the warmer the air, the greater the energy to evaporate water into water vapor, therefore the greater capacity of that air
saturation vapor capacity (SVC)
59
ratio of the AVC to the SVC
AVC divided by SVC times 100
60
no more liquid water can be evaporated
saturated
61
air can absorb more water
unsaturated
62
what happens to relative humidity (RH) if AVC increases
the humidity goes down
63
the temp at which the air is saturated when the actual amount of water vapor in the air is equal to the airs capacity the moisture condenses. the moisture leaves the gas state and becomes liquid AVC=SVC
dew point
64
study of the earths atmosphere
metrology
65
the airs temp what but the actual content stays the same
decreases
66
what happens when air reaches the dew point
the water condenses on objects and is called dew if a dew point is 32° or lower it is called frost if the condensation happens in the air it is called fog or clouds if it is higher
67
RH=
100%
68
very small water droplets or ice crystals from condensed water vapor contain tiny particles from condensation to occur dust, dirt, pollen, ice crystals
clouds
69
high cloud wispy, feathery clouds, made of ice crystals common on nice days
cirrus
70
very thin made of ice crystals sun or moon produces a halo
cirrostratus
71
layer clouds small "puffs" middle clouds
altocumulus
72
middle clouds | no layer is produced
altostratus
73
low clouds layer clouds fair weather clouds
cumulus
74
rain/snow clouds | layered cloud
nimbostratus
75
vertically developed cloud thunderstorm clouds very tall 1000-4000 feet tall
cumulonimbus
76
air rises when it is warmer than the surrounding air
convection
77
air rises when it is forced upwards by winds
convergence
78
air rises when 2 air masses collide
frontal lifting
79
air rises when it is forced over a mountain
orographic
80
air that is not saturated cools at what temp per 1000 feet
5.5°
81
air that is saturated cools at what temp per 1000 feet
3.5°
82
cloud base is the height when ...
temperature = dew point
83
cloud top Is the point when the air is...
no longer buoyant