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Flashcards in Weather And Climate Deck (44):
1

Altitude

Height above sea level. Lose up to 1C per 100m gain

2

Anthropogenic climate change

Human induced climate change

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Anticyclone

An area of high atmospheric pressure

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Atmosphere

The envelope of air surrounding the Earth

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Atmospheric pressure

Pressure exerted by the atmosphere on any surface by virtue of its weight

6

Climate

The long term average weather at a location; usually over a 30yr period

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Cold front

Cold air catching up the arm air mass, forcing its way under

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Continentality

Inland areas being away from the coast are drier

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Continental air

Dry air from a continent

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Conventional rainfall

Caused by rapidly rising air rising, cooling and condensing

11

Depression

Area of low atmospheric pressure

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Evaporation

The physical process by which a liquid or solid substance is transformed to a gas

13

Eye

Centre of the hurricane where sinking air creates clear conditions

14

Eye wall

A high bank of cloud around the eye where wind speeds are high and heavy rain falls

15

Fetch

Distance waves travel before landfall

16

Fog

Water that has condensed close to the ground to form a dense low cloud with poor visibility

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Front

The boundary between two air masses

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Frontal rainfall

Warm air pushed over cold air forcing it to rise, cool and condense

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Global warming

An increase in average temperatures as a result of increased greenhouse gas emissions

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Greenhouse effect

The blanketing effect of the atmosphere which retains heat

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Greenhouse gases

Gases such as carbon dioxide and methane which effectively absorb heat

22

Hurricane

Area of extreme low pressure. Also known as cyclones/typhoons/willy willies

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Insolation

Energy from the sun that heats the earth

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IPCC

Intergovernmental Panel on Climate Change - the global authority on the latest climate change data and predictions

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Isobar

Line of equal pressure

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Kyoto Protocol

International Agreement in 1997 to get countries to reduce their emissions

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Maritime air

Air with lots of moisture from the oceans

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North Atlantic Drift

Ocean current, originating in the Gulf of Mexico that warms Northern Europe

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Occluded front

Where a cold front catches up with a warm front

30

Okta

Measurement of cloud cover, measured in 1/8ths

31

Polar air

Cold air from one of the poles

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Precipitation

All forms of water particles that reach the ground

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Prevailing wind

The direction from which the wind most frequently blows

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Rain shadow

Area in the lee of uplands where there is less rainfall

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Relief/orographic rainfall

Caused as air masses are forced over higher land

36

Seasonality

Periodic fluctuations in an area's climate

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South-West

The UK's prevailing wind

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Track

The path or course of a hurricane

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Tropical air

Warm air from one of the tropics

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Warm front

Warm air catching up with cold air mass, and rising above it

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Warm sector

Area of warm air between warm front and cold front

42

Weather

The conditions in the atmosphere at a given point in time

43

Wind

Movements of wind caused by changes in temperature or pressure

44

Air mass

A large body of air that has similar temperature, pressure and moisture