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Geography > Climatology > Flashcards

Climatology Flashcards

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1
Q

High Pressure

A

Subsiding air(descending), anticlockwise in rotation in S hemisphere

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2
Q

Low Pressure

A

Rising air, clockwise in rotation in S hemisphere

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3
Q

Coriolis force

A

Deflection of wind and ocean currents as result of world spinning. Deflection left in SH and right in NH

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4
Q

Doldrums

A

place of zero hzontal air flow. Associated with equator(ITCZ)

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5
Q

ITCZ

A

Inter Tropical Convergence Zone. Band of LP’s as a result of perpendicular heating from sun

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6
Q

Advection

A

hzontal movement of air in atmosphere

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7
Q

Convection

A

LP currents(vertical) resulting from suns heating

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8
Q

PGF always moves from …

A

High to low

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9
Q

Relationship between geostrophic flow and isobars?

A

Geostrophic flow is always parallel to the isobars

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10
Q

Isobars

A

lines of eql psi

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11
Q

Primary circulation(vertical) cells

A

Hadley(0-30°)
Ferrell(30-60°)
Polar(60-90°)

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12
Q

4 main psi cells

A

Equatorial low (equator 0°)

Sub-tropical high (30°)

Sub-polar low (60°)

Polar high (90°)

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13
Q

Pressure cell characteristics

A

Equatorial LP - thundershowers due to convection
Subpolar LP - Cold fronts/rainfall
All HP - Descending air, deserts + clear skies

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14
Q

Secondary Circulation(hzontal)

A

Tropical easterly (trade winds) 5-30

Westerly wind belt 30- 60

Polar easterly wind belt 60-90

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15
Q

Atmospheric Circulation

A

Distributes thermal ene over earth surface

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16
Q

Atmospheric psi

A

force per unit area exerted over earth

17
Q

How are HP’s formed?

A

When air go down at surface

18
Q

Pressure Gradient strength

A

Depends on distance of isobars - further isobars = weak pressure gradient and vice versa.

19
Q

PGF

A

Force acting on atmosphere as result of pressure gradient. Moves air from HP to LP also makes speed of wind. eg strong PGF = higher wind speed.

20
Q

Monsoon Winds

A

Seasonal reversal of atmos psi and winds

21
Q

Fohn Winds

A

Dry hot winds where there are significant changes in altitude(eg mountainous area)

22
Q

DALR

A

Dry Adiabatic Lapse Rate

23
Q

SALR or WALR

A

Saturated Adiabatic Lapse Rate or Wet Adiabatic Lapse Rate. Both the same thing

Geography (10 decks)

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