Maths A - level : Edexcel large data set

Months of recorded data

May - October

Years of recorded data

1987 and 2015

5 places in the UK where weather samples are provided

Leuchars, Leeming, Heathrow, Hurn, Camborne

3 places overseas where weather samples are provided

Jacksonville, Beijing, Perth

Daily Mean Temperature

Air temperatures are recorded by thermometers in a louvered screen 1.25 metres above short grass,  except at some Weather Centre’s and Climate Data Logger stations,  where observations are made from a non-standard roof top exposure. 
Values are noted in degrees and tenths (Degrees Celsius) and values below 0 Deg C are preceded by a minus sign. A reading which is not available is listed as ‘n/a’.
The ________(0900-0900 GMT) is the average of the hourly temperature readings during this period.

Daily Total Rainfall

______ refer to 24 hour periods commencing at 0900 Greenwich Mean Time (1000 British Summer Time) on the day of entry and includes any solid precipitation, such as snow or hail, which is melted and measured in the same way as rainfall.
A ‘trace or tr’ of rain is an amount less than 0.05mm. A reading which is not available will be shown by ‘n/a’.  All totals are in millimetres (mm).

Daily Total Sunshine

At most Met Office stations ______ is measured by an instrument that measures the amount of solar radiation exceeding a threshold.
_____ amounts are recorded in hours and tenths and show the amount of bright ______ recorded on the day of entry. A reading which is not available is listed as ‘n/a’.

Daily Maximum Relative Humidity

The _____ is a measure of how close the air is to being saturated with water vapour.  _______ of above 95% are associated with mist and fog. A reading which is not available is listed as ‘n/a’.

Daily Mean Windspeed

● ______ are given in knots (1 knot = 1.15mph).
The daily mean speed is averaged over the 24 hours from 0000GMT on the date given.

For all locations, the speed of the wind is also categorised according to the Beaufort scale. For the UK locations, the wind and gust direction measurements are also listed as cardinal directions.

Cloud cover

____ is measured in eighths (Oktas).
____is the fraction of the celestial dome covered by cloud.

Pressure

• The mean sea level _____ has been calculated from a measurement made at station level.
• Units - the ____ unit used in meteorology was previously the millibar (one bar = 1000 millibars). However, this has been replaced by the SI unit of _____ — the pascal (Pa). 
One hectopascal (hPa) = 1 millibar (mb).

Daily Maximum Gust

● The ________ is the maximum instantaneous speed that occurred during the 24 hours from 0000GMT on the date given. Readings for both variables which are not available are listed as ‘n/a’.

For all locations, the speed of the wind is also categorised according to the Beaufort scale. For the UK locations, the wind and gust direction measurements are also listed as cardinal directions.

Daily Mean Wind Direction

● The ​______ is averaged over the 24 hours from 0000GMT on the date given, ​rounded to the nearest 10 degrees

For all locations, the speed of the wind is also categorised according to the Beaufort scale. For the UK locations, the wind and gust direction measurements are also listed as cardinal directions.

Daily Maximum Gust  Direction

● The _______ is that direction from which the wind was blowing when the maximum gust during the hour commencing at the time of entry occurred, and is measured in degrees from true north.

For all locations, the speed of the wind is also categorised according to the Beaufort scale. For the UK locations, the wind and gust direction measurements are also listed as cardinal directions.