Large Data Set

Question 1

Which months are included in the large data set?

Answer 1

May to October

Question 2

Which years are included in the large data set?

Answer 2

1987 and 2015

Question 3

Which cities are included in the large data set?

Answer 3

Leuchars, Leeming, Heathrow, Hurn, Camborne

Jacksonville, Beijing, Perth

Question 4

Where is Leuchars?

Answer 4

East coast of Scotland. So northern hemisphere and near the sea

Question 5

Where is Leeming?

Answer 5

North England, central. So northern hemisphere and not near the sea

Question 6

Where is Heathrow?

Answer 6

South east England, not near the sea. Northern hemisphere

Question 7

Where is Hurn?

Answer 7

South coast of England, central. Near the sea, northern hemisphere

Question 8

Where is Camborne?

Answer 8

South West England. Cornwall area. Northern hemisphere, near the sea

Question 9

Where is Jacksonville?

Answer 9

Northern Florida, east side. Near the sea, northern hemipshere

Question 10

Where is Beijing?

Answer 10

Northern hemisphere. North east China. Not coastal

Question 11

Where is Perth?

Answer 11

South west coast of Australia. Coastal. Southern Hemisphere

Question 12

How many days are there in each of the months of the large data set?

Answer 12

May 31
June 30
July 31
August 31
September 30
October 31

Question 13

What are the weather variables?

Answer 13

Daily mean temperature
Daily total rainfall
Daily total sunshine
Daily mean windspeed, and Beaufort conversion
Daily maximum gust
Daily maximum relative humidity
Daily mean total cloud
Daily mean visability
Daily mean pressure
Daily mean wind direction, and Cardinal direction
Daily maxJust corresponding direction, and cardinal direction

Question 14

What is the accuracy of daily mean temperature?

Answer 14

A tenth of a degree centigrade. Eg, 10.2

Question 15

What is the accuracy of daily total rainfall?

Answer 15

Tenth of a mm. Eg, 1.4 mm

Question 16

What is the accuracy of daily total sunshine?

Answer 16

Tenth of an hour. Eg, 12.3 hours

Question 17

What is the accuracy for daily mean windspeed?

Answer 17

Nearest whole knot. Eg, 6 kn

Question 18

What are the values the Beaufort conversion (windspeed) can take?

Answer 18

Light, moderate, fresh (increasing windiness)

N/a

Question 19

What is the accuracy of daily maximum gust?

Answer 19

Nearest knot, eg 27 kn

Question 20

What are the units, and accuracy of daily maximum relative humidity?

Answer 20

Percentage, nearest percent. Eg, 67%

Question 21

What is the unit and accuracy for daily mean total cloud? What is the range of the unit?

Answer 21

Oktas. Nearest whole okta. Ranges from 0 to 8 oktas, so there are 9 possible values

Question 22

What is the accuracy for daily mean visibility? Units?

Answer 22

Nearest hundred decametres. Eg, 1500 Dm

Question 23

What is the accuracy and units of daily mean pressure?

Answer 23

Nearest whole hPa. Eg, 1017 hPa. Hectopascal. Hecto = 10^2

Question 24

What is the accuracy of daily mean wind direction?

Answer 24

Nearest 10°

Or for cardinal direction, up to 3 letters. Eg, both N and WNW are acceptable

Question 25

What is the accuracy for daily max gust corresponding direction?

Answer 25

Nearest 10° | Or for cardinal direction, up to 3 letters. Eg, both N and WNW are acceptable

Question 26

What is daily mean temperature? What does n/a mean for this variable?

Answer 26

The average of the hourly temperature readings during this period N/a = not available

Question 27

What is daily total rainfall? What does tr and n/a mean for this variable?

Answer 27

It includes any solid precipitation, such as snow or hail, which is melted and measured in the same way as rainfall tr = trace = amount less than 0.05 mm N/a = not available

Question 28

What is daily maximum relative humidity?

Answer 28

The relative humidity is a measure of how close the air is to being saturated with water vapour. Relative humidities above 95% are associated with mist and fog

Question 29

1 knot = [ ] mph

Answer 29

1.15

Question 30

How is the daily mean wind speed calculated?

Answer 30

It is averaged over the 24 hours

Question 31

What is the daily maximum gust?

Answer 31

The Maximum instantaneous speed that occurred during the 24 hours

Question 32

How is daily mean wind direction are calculated?

Answer 32

It is averaged over the 24 hours

Question 33

What is the direction of the maximum gust?

Answer 33

The direction from which the wind was blowing when the maximum gust during the hour commencing at the time of entry occurred. Angle measured from true north

Question 34

In which locations, are the wind and gust direction also measured in cardinal directions, as well as degrees?

Answer 34

All the UK locations

Question 35

What is cloud cover?

Answer 35

The fraction of the celestial dome covered by cloud

Question 36

What is visibility defined as?

Answer 36

The greatest distance at which an object can be seen and recognised in daylight, or at night could be seen and recognised if the general illumination were raised the daylight level. Measured horizontally.

Question 37

What indicates that a value for visibility is not available?

Answer 37

A dash

Question 38

1 hPa = [ ] millibars

Answer 38

1

Question 39

Which variables do the foreign locations have data for?

Answer 39

``` Daily mean air temp Rainfall Daily mean pressure Daily mean windspeed Windspeed (Beaufort conversion) ```

Question 40

When was the British hurricane?

Answer 40

15th/16th October 1987