Data Sheet Flashcards
What does the data set consist of
The data set consists of weather data samples provided by the Met Office for five UK weather
stations and three overseas weather stations in the time periods May to October 1987 and May to
October 2015.
What are the UK places in the data set
Camborne
Heathrow
Hurn
Leeming
Leuchars
What are the overseas places in the data set
Beijing
Jacksonville
Perth
Where is leuchars
East Scotland
Where is Leeming located
North central England
Where is Heathrow located
South central England
Where is hurn loacted
South coast England
Where is Camborne located
Southwest England
Cornmall area
Where is Jacksonville loacted
USA east coast
Where is Beijing located
East of China
Where is Perth located
West coast of Australia
How is air temperature measured 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.
How are values noted for daily mean temp
Values are noted in degrees and tenths (Degrees Celsius) and values below 0 Deg C are preceded by
a minus sign
What is a reading that’s not available listed as
N/a
What is (0900-0900 GMT)
e average of the hourly temperature readings
during this period.
What does daily total rainfall refer to
Daily totals 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.
What does trace or tr mean when referring to rainfall
A ‘trace or tr’ of rain is an amount less than 0.05mm.
What are all totals of rainfall in
mm
What is daily total sunshine measured by
At most Met Office stations sunshine is measured by an instrument that measures the amount of
solar radiation exceeding a threshold
What are sunshine amounts recorded in
Sunshine amounts are recorded in hours and tenths and show the amount of bright sunshine
recorded on the day of entry.
What units are wind speeds given in
Knot
What does 1 knot = in mph
1.15 mph
What is rhe daily mean speed averaged over
The daily mean speed is averaged over the 24 hours from 0000GMT on the date given.
What is the daily mean wind direction rounded to
The dearest 10°
What is the direction of the maximum gust measured from
The direction of the maximum gust 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
What is the speed of the wind also categorised accoutring to
The Beaufort scale
For the uk locations the wind gust direction are also listed as?
Cardinal directions
What is cloud cover measured in
Eights
(oktas)
What is visibility
Visibility is defined as the greatest distance at which an object can be seen and recognized in
daylight, or at night could be seen and recognized if the general illumination were raised to daylight
level.
What is visibility meausred using
It is measured using visiometer at automatic sites but used to be done by observers at manual
stations except at some Weather Centres and Climate Data Logger stations, where observations are
made from a non-standard roof top exposure.
T or f
Visibility is meausred horizontally
T
What units are visibility used in
Decametres
Dam
What indicates that data is not available for visibility
A dash
What is the units fro pressure (sea level)
Old + new
Units - the pressure unit used in meteorology was previously the millibar (one bar = 1000
millibars). However, this has been replaced by the SI unit of pressure — the pascal (Pa).
One hectopascal (hPa) = 1 millibar (mb).
One heteopascal = how many millibars
1
