Chapter 1 - Large Data Set - Year 1 Flashcards
What happened in October 1987?
The biggest storm in the UK for 300 years
When was the big storm?
October 1987
What does a northerly wind mean?
A wind that comes from the north
What does clean the data mean?
Get rid of any anomalous results
Assume that tr = 0.025mm
What does tr mean?
There wasn’t enough rainfall to justify measuring so there is no exact value
We say that this is 0.025mm of rain
What is the problem of tr?
If there are a lot of them they could screw the data
Where are the weather stations?
Leuchars
Leeming
Heathrow
Hurn
Camborne
Jacksonville
Beijing
Perth
What is the most northern weather station in the UK?
Leuchars
What is the most eastern weather station in the UK?
Heathrow
What is the most southern weather station in the UK?
Camborne
What is the most western weather station in the UK?
Camborne
Which is more northern Beijing or Jacksonville?
Beijing
What is the most southern weather station in the world?
Perth
Describe Leuchars?
It has the lowest average temperatures and it is the most northern weather station
What is special about Leeming?
It is dry and almost semi arid
What is special about Heathrow?
It is far enough away from the city that the temperature isn’t raised by the “urban heat island” effect
It is below average rainfall of Great Britain
It has relatively hotter summer temperatures
What is special about Hurn
Near to the coast
Rainfall well below the average
What is special about Camborne?
It has the mildest and sunniest climate in the UK
In places it is sub-tropical due to its Southern nature and its proximity to the gulf stream
Rainfall is not uncommon
It doesn’t have extreme temperatures
What is special about Beijing?
Due to the Monsoon season summers are humid
Cold windy but dry winters
What is special about Jacksonville?
Humid subtropical climate
Winters are mild sunny and rarely sub zero
Summers are usually very hot humid and stormy, torrential downpours
High humidity which makes high heat indices common in the summer
What is special about Perth?
Mediterranean climate
Winters are cool and wet
Summers are hot, dry and sunny
What is wind speed measured in?
Knots
Or
The Beaufort Scale
1kn =
1 knot = 1.15mph
What are the numerical values in the Beaufort scale?
0 = calm <1kn
1-3 = Light 1-10kn
4 = moderate 11-16kn
5 = Fresh 17-21kn
What does mean visibility mean?
How far can be seen into the horizon during daylight hours
What is mean visibility measured in?
Dm
1Dm
1Dm = 10 meters
How can you describe wind direction?
Bearing
Compass points (eg NEN)
What is pressure measured in?
hectopascal (hPa)
What is the measurement of mean cloud cover?
Oktas meaning the number of 1/8th of the sky is covered
How many different values does the Oktas have?
0-8 so 9 values
What is humidity?
The % of air saturation with water vapour
What is maximum gust?
What is it measured in?
The highest instantaneous wind speed
Measured in Kn
What is total sunshine rounded to?
1/10 of an hour
What is temperature measured in?
Celsius
Why may a simple sample not work?
The isn’t data for all days
