Weather Flashcards
Define weather
The day to day changes in the conditions of the atmosphere
Define climate
Average conditions of the weather taken over a long period of time, usually 35 years
Name the instrument used to measure temperature and units measured in
Digital thermometer
Measured in °C
Instrument used to measure precipitation and units used.
Rain gauge
Measured in millimetres
Instrument used to measure wind direction and units
Wind vane
8 compass points
Instrument that measures wind speed and units used
Anemometer
Knots
Instrument used to measure atmospheric pressure
Barometer
Millibars
Instrument used to measure cloud types
Sight
Instrument and units of cloud cover
Sight
Oktas
Name the main cloud types
Cirus
Stratus
Cumulus
Cumulonimbus
Describe the cirrus cloud
Thin whisky white clouds
High in the sky
Contains ice crystals
Describe cumulus clouds
Low puffy and piled up
Usually indicate fair weather but can sometimes indicate rain
Describe stratus clouds
Uniform layers of cloud
Low lying
Grey colour
Describe cumulonimbus clouds
Tall fluffy grey clouds
Indicate thunderstorms and rain
How do land based stations help forecast weather
The will measure weather that people experience. Measure elements such as temperature, rainfall, mean wind speed and duration of sunshine.
How do sources of data in the air help forecast weather?
Most data is captured in digital from from space, using satellites.
What data do satellites capture?
Snowfall, wildfire locations, Doppler radar images of precipitation.
What is a satellite
A satellite is a small spacecraft that carries specific weather instruments.
What is a geostationary satellite?
A satellite which has a geostationary orbit is one which moves at the same speed as the earths rotation meaning it covers one spot.
What is a polar orbiting satellite?
Passes the same point every 12 hours provides a changing picture of the weather.
What is used at sea to measure conditions and what conditions are measured?
A buoy is used. These measure usual weather climate statistics, sea temperature, wave heights and swell.
Which factors affect climate?
Prevailing wind
Latitude
Altitude
Distance from sea
How does prevailing wind affect the climate
Prevailing wind is the most commonly experienced wind direction in a place. The wind temperature and amount of rainfall depend on where the air has come from. Places with prevailing winds from dry hot continental interiors end up with a desert climate.
How does latitude affect the climate
The further you get from the equator the colder it gets. This is due to the curvature of the Earth and angle at which sun rays hit. Places near the equator get stronger more direct concentrated radiation from the sun.