Weather And Climate Flashcards

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1
Q

To work effectively, where do wind vanes have to be?

A

On the top of a roof, and must be free from any shelter from chimneys or nearby buildings

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2
Q

Where is the best place to take a wind speed reading?

A

On top of a roof, avoiding shelter

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3
Q

If an anemometer is hand held, where must it be held and why?

A

High above the observers head to make sure the flow of the cups is not disrupted in any way

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4
Q

What is the one problem with an anemometer?

A

It usually take more than 10 knots of air flow to make sure the reading is accurate

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5
Q

When is polar continental more prevalent?

A

In winter rather than summer

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6
Q

Where does polar continental originate from?

A

Northern Europe

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7
Q

What does polar continental produce?

A

Very cold conditions in the winter and milder conditions in the summer

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8
Q

When is polar continental air unstable?

A

In the winter and can bring snow showers along the east coast of England

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9
Q

What does polar continental bring?

A

Dry yet cool conditions with stratus clouds

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10
Q

Where does tropical continental affect and when?

A

The British isles and usually only in the summer

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11
Q

Where does tropical continental air travel from?

A

North Africa and the Mediterranean

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12
Q

What kind of weather can tropical continental bring?

A

Very warm and dry air from the south/south east coast. It can cause thunderstorms if temperatures rise

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13
Q

What conditions does tropical continental bring in winter and summer?

A

In summer it brings mild conditions in winter and hot in summer

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14
Q

Where is polar maritime most common

A

In the British isles

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15
Q

Where does polar maritime come from?

A

North America and reaches U.K from west/north west

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16
Q

What type of air does polar maritime produce?

A

Unstable air which creates cumulus and cumulonimbus clouds

17
Q

What can polar maritime cause in the summer months?

A

Conventional rainfall

18
Q

Where is tropical maritime most common in?

A

The British Isles

19
Q

Where does tropical maritime travel from?

A

Warm southern Atlantic Oceans

20
Q

Where does tropical maritime move over?

A

The south west of the British isles

21
Q

What time of conditions do tropical maritime bring in summer and winter?

A

Mild conditions in winter and warm conditions in summer

22
Q

What type of weather does tropical maritime bring?

A

Dull skies, drizzle and fog

23
Q

What is air pressure?

A

The weight of air resting on the earths surface

24
Q

What units is air pressure measured in?

A

Millibars (mb)

25
Q

What will cause differences in air pressure?

A

Differences in temperature

26
Q

When does low pressure occur?

A

When air becomes warmer the air molecules become lighter and it rises

27
Q

What happens to the air when it’s at low pressure?

A

It rises, cools, condenses, clouds form and rain

28
Q

When does high pressure occur?

A

When air becomes colder, the air molecules contract, become denser, heavier and sink towards the earth

29
Q

What happens to the air when it’s at high pressure?

A

It sinks, warms up, no condensation, no clouds and no rain