Large Data Set Flashcards
What does tr mean (rainfall)
Tr means trace - amounts <0.05mm
How is daily total sunshine recorded
Daily total sunshine is recorded to nearest 10th of an hour
What is the Beaufort scale
Beaufort scale is used to measure daily mean windpseed and direction, 0 is calm, 1-3 is light, 4 is moderate, 5 is fresh
How is max gust recorded
Max gust is recorded in knots, highest instantaneous wind speed recorded
How is humidity measured and what happens when high
Humidity is measured as % of air saturation with water vapour, above 95% gives rise to misty and foggy conditions
How is daily mean cloud cover measured
Daily mean cloud cover can be measured in oktas (eights of sky covered with cloud, e.g 0/8, 1/8)