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Maths > Large Data Set > Flashcards

Large Data Set Flashcards

1
Q

Which weather stations are in the North of the U.K.?

A

Leuchars (further north), Leeming

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2
Q

Which weather stations are in the south of the U.K.?

A

Cambourne (furthest south), Hurn, Heathrow

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3
Q

Which weather stations are on the coast?

A

Cambourne, Hurn

Jacksonville, Perth

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4
Q

Which weather station is in the Southern Hemisphere?

A

Perth (Australia)

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5
Q

When did the large data set run from?

A

May to October 1987

May to October 2015

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6
Q

How many different observations are measured?

A

10 in U.K.

4 internationally

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7
Q

Which observations are made internationally?

A
  • Daily mean wind speed
  • Daily total rainfall
  • Daily mean temperature
  • Daily mean pressure
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8
Q

Which observation are made in the U.K.?

A
  • Daily mean wind speed
  • Daily mean wind direction
  • Daily maximum gust
  • Daily maximum relative humidity
  • Daily mean cloud cover
  • Daily mean visibility
  • Daily total rainfall
  • Daily total sunshine
  • Daily mean pressure
  • Daily mean temperature
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9
Q

What is daily mean temperature measured in?

A

°C (Celsius) the average of hourly readings across 24 hours

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10
Q

What is daily total rainfall measured in?

A

Mm (millimetres) where the total precipitation for the 24 hour period is measured (solid precipitation is melted before being measured and less than 0.05mm is recorded as trace)

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11
Q

What is daily total sunshine measured in?

A

Recorded to the nearest 10th of an hour (i.e. 3.4 hours)

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12
Q

What is the daily mean cloud cover measured in?

A

Oktas (1/8s of the sky is covered in cloud)

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13
Q

What is daily mean pressure measured in?

A

Hectopascals (hPa)

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14
Q

What is daily mean visibility measured in?

A

Decametres (Dm). The greatest horizontal distance from which an object can be seen in daylight

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15
Q

What is daily mean wind direction measured in?

A

Given as bearings and cardinal (compass) directions. Averaged out over 24 hour period.

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16
Q

What is daily mean wind speed measured in?

A

Measured in knots however it is recorded in Beaufort scale

Average over 24 hour period from midnight to midnight

17
Q

What is the daily maximum gust measured in?

A

Knots. Highest instantaneous wind speed recorded. Direction also measured of it.

18
Q

What is the daily maximum relative humidity?

A

The percentage of air saturation with water vapour

Above 95% gives rise to foggy/misty conditions

19
Q

What is the Beaufort scale

A 
Calm = 0 = less than 1 knot
Light = 1-3 = 1-10 knots
Moderate = 4 = 11-16 knots
Fresh = 5 = 17-21 knots
20
Q

What are knots (kn)?

A

A nautical mile per hour

1kn=1.15mph

21
Q

Which weather station is furthest west in U.K.?

A

Cambourne

22
Q

Which weather station is furthest east in U.K.?

A

Heathrow

Maths (3 decks)

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