Weather and Climate
Terms in this set (23)
The day to day conditions we experience in the atmosphere.
The long term pattern of weather on average over a 30 year period.
The Earth tilts at about 23.5° which gives us seasonal variation.
Divisions of the Earth's climates into general zones according to average temperatures and average rainfall.
Used for measuring air pressure in millibars (mBar).
Used to measure windspeed, normally in mph or km/h.
Measures precipitation (rain, hail, sleet, snow, etc) in mm.
Used to measure wind direction using compass points. The arrow points to where the wind is coming from.
Distance north or south of the equator.
For every 100m above sea level the temperature decreases by approximately 1°C.
Sea heats up slowly and cools down slowly. Land heats up fast and cools down fast.
Ocean currents (The Gulf Stream)
A current of warm water that travels from the Gulf of Mexico.
Prevailing wind direction
The direction the wind comes from influences temperature and precipitation.
Happens when moist air rises over hills and mountains.
Happens when it is hot and warm air rises, cools and condenses.
Happens when warm air and cool air meet and warm air rises over the cool air mass.
Polar air masses come from the northeast or northwest.
Tropical air masses come from the south.
Air masses that come from the north.
Air masses that travel over land.
Air masses that travel over the sea.
High pressure system (Anticyclones)
Large high pressure systems (above 1020 mBar) that have air moving in a clockwise direction. Responsible for calm conditions, which can be very hot during the summer or very cold during the winter.
Low pressure system (Depression)
Low pressure systems (below 1013 mBar) associated with wet and windy weather. Responsible for changeable
weather like we have in the UK.