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Flashcards in quiz 3 Deck (49):
1

Atmospheric Pressure

the force exerted by the weight of these gas molecules on a unit of area of earths surface on any other body

2

Dynamic High

Strongly descending air is usually associated with high pressure at the surface

3

Thermal High

Very cold surface conditions are often associated with high pressure at the surface

4

Dynamic Low

strongly rising air is usually associated with low pressure at the surface

5

Thermal Low

very warm surface conditions are often associated with relatively low pressure at the surface

6

In pressure, highs and lows represent what relative conditions?

pressure that is higher or lower than that of surrounding areas

7

Ridge

an elongated area of relatively high pressure

8

Trough

an elongated area of relatively low pressure

9

Wind

horizontal air movement

10

Geostrophic Wind

wind that moves parallel to the isobars

11

Friction Layer

extends to about 1000 meters above the surface

12

Anticyclone

a high pressure wind center

13

Cyclone

Low pressure wind center

14

Hadley Cells

The two prominent tropical convection centers north and south of the equator

15

Subtropical High

a large semipermanent high pressure cell centered at about 30 degrees

16

Trade Winds

major wind system of the tropics

17

intertropical convergence zone

AKA doldrums, the zone from where the air from the northern hemisphere and the southern hemisphere meet

18

Westerlies

the great wind system of the midlatitudes

19

jet streams

the "cores" of high speed winds called the polar front jet stream and the subtropical jet stream

20

Rossby Waves

Curves that produce a jet stream path and wander widely north and south

21

Polar Highs

high pressure cells

22

polar easterlies

occupies most of the area between the polar highs and about 60 degrees of latitude

23

Polar Front

a zone of low pressure between 50 and 60 degrees north

24

Subpolar lows

semipermanent zones of low pressure

25

Antitrade Winds

upper elevation winds that blow from the southwest in the northern hemisphere and from the northwest in the southern hemisphere

26

Monsoon

a seasonal reversal of winds

27

Katabatic Winds

originate in cold, upland areas and cascade toward lower elevations under the influence of gravity

28

Santa Ana Winds

drying winds in california that develop when a cell of high pressure persists over the interior of the western united states for several days

29

El Nino

an episodic atmospheric and oceanic phenomenon of the equatorial pacific ocean.

30

Hydrologic Cycle

the unending circulation of our planets water

31

saturation

the maximum possible vapor pressure at a given temperature

32

vapor pressure

the pressure exerted by water vapor

33

absolute humidity

the mass of water vapor in a given volume of air

34

specific humidity

the mass of water vapor in a given mass of air

35

dew point

the temperature to which air must cool in order to saturate

36

Lifting condensation level

the altitude at which clouds form

37

High Clouds

"cirro" clouds

38

Middle Clouds

"alto" clouds

39

Low Clouds

"strato" clouds

40

Vertical Clouds

Cumulus and cumulonimbus

41

Radiation Fog

results when the ground radiates away heat

42

Advection Fog

develops when warm, moist air moves horizontally over a cold surface

43

Orographic Fog

created by adiabatic cooling when humid air climbs a topographic slope

44

Evaporation Fog

results when water vapor is added to cold air that is already near saturation

45

Dew

originates from terrestrial radiation

46

Stable Air

resists uplift

47

Unstable Air

rises without any external force

48

Convective Lifting

the density of the warmed air is reduced as the air expands

49

Orographic Lifting

can produce orographic precipitation if the rising air is cooled by the dew point