Weather Flashcards

1
Q

water and weather

A

water can absorb or release substantial quantities of heat without any significant change in temperature

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2
Q

specific heat (heat capacity)

A

very high, water takes a long time to heat up

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3
Q

latent heat

A

energy released or absorbed during change of state

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4
Q

calorie

A

unit of energy

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5
Q

what is humity

A

amount of water in the atmosphere, a measure of the amount of moisture in air

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6
Q

which can hold more water warm or cold air

A

cold air

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7
Q

relative humidity

A

amount of water point relative to the max can be held

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8
Q

dew point

A

straturation point of atmosphere.

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9
Q

atmospheric pressure

A

decreases with increasing altitude, local variation related to density,

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10
Q

cold dry air

A

sinks and compresses

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11
Q

high pressure rotates which way

A

clock wise

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12
Q

low pressure rotates which way

A

counter clock wise

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13
Q

warm moist air

A

rises and expands

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14
Q

lower the pressure =

A

bad weather

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15
Q

why does the wind blow

A

air moves from high to low pressure, always moves from high to low pressure, widely spaced circles from the west

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16
Q

atmospheric circulation

A

southern hemisphere deflected to left, northern hemisphere deflected to right

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17
Q

parts of atmospheric circulation

A

circulation cells, wind bands, polar easeries, westerlies, trade winds,

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18
Q

weather systems track from

A

the west/ to east, because of westerlies

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19
Q

why do weather patterns track from west to east?

A

westerlies

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20
Q

why do tropical storms track from east to west?

A

following the trade winds

21
Q

air masses

A

changes in weather are the result of interaction between moving air masses, source area and temperature.

22
Q

martime and continental

A

most interesting weather

23
Q

air masses change from

A

temp, topography

24
Q

front

A

boundary between moving air masses

25
cold front
heavy rainfall, weather changes for the worst, on a weather map has teeth, moves faster
26
warm front
light rainfall, redline, half circle, warm air behind, cold air front
27
continental polar and maritime tropical air mass
most weather system in us are this type
28
what influences where storm systems track?
jet stream, curvature
29
jet stream
strong, focused, high altitude winds, follow westerly winds. west to east
30
curvature
get weather, curves up and down
31
down curvature
cyclonic circulation, low pressure, counter clockwise
32
up curvature
anticyclonic cirulation, high pressure, clockwise
33
thunderstorms
happen during summer, cold fronts produce super cells, latent heat, as it rains out it loses energy
34
3 stages of Thunder storm
cumulus, mature, and dissipating
35
mature
rain dissipating
36
what causes lighting?
strong up drafts, strong down drafts, up and down drafts pass each other and friction happens. cause electrostatic charges to separate
37
pilot leader
negative charge goes towards the ground, electrical discharge
38
how does a tornado happen
cold front produces super cells, jet stream moving along cold front, extreme pressure gradinets,
39
3 stages of tornado
early, updraft, and tornado
40
updraft
bringing in air from all over friction starts to create vortex
41
spin
funnel cloud
42
Types of air masses
cA, cP, cT, mP, mT
43
air masses
identified by the temp and moisture characteristics of the underlying surface
44
midlatitude cyclone
large center of low pressure with an associated cold front and often a warm front. frequently accompanied by abundant precipitation. moves counter clockwise
45
front
boundary from one air mass and another
46
study page
418
47
trade winds
two belts of winds that blow almost constantly from easterly directions and are located on the equatorial sides of the subtropical highs
48
westerlies
winds between 30 degrees and 60 degrees latitude that move west to east and greatly influence weather in North America
49
occluded front
a composite front formed when a cold front overtakes a warm front and forces it aloft. purple line on map