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Weather & Climate What is the difference between weather and climate? Weather is the day to day changes in the atmosphere. temperature precipitation humidity wind speed wind direction cloud cover air pressure sunshine What is the difference between weather and climate? Climate is the overall pattern of weather, usually based on an average over 30 years. Click on the buttons to find out about these types of climate. The water cycle The water cycle in more detail What is precipitation? Precipitation is water from the atmosphere. It can be in solid or liquid form. Name as many different types of precipitation as you can! High Pressure • Higher pressure than what is normal for that altitude. • Brings clear skies and fair weather. Picture taken from: http://www.windows.ucar.edu/tour/link=/earth/Atmosphere/high_pressure.html Low Pressure • A low pressure region is associated with rising air. • Clouds, rain, and very strong winds occur. Picture taken from: http://www.windows.ucar.edu/tour/link=/earth/Atmosphere/low_pressure.html Frontal rain Convectional rain Relief rain Wind • Caused by the earth’s surface being heated unevenly by the sun. • Why would the earth’s surface heat unevenly? Weather animation Temperature • Temperature - Air higher in pressure is usually cooler air and air lower in pressure is usually warmer air. Atmosphere • • • • • Troposphere - Most of the weather occurs. Stratosphere - 19% of the atmosphere’s gases are here; ozone layer is here Mesosphere - Most meteorites burn up here. Thermosphere - High energy rays from the sun are absorbed; hottest layer. Exosphere - Molecules from atmosphere escape into space; satellites orbit here. Picture taken from: http://www.windows.ucar.edu/tour/link=/earth/ Atmosphere/layers_activity_print.html Cloud Types Picture taken from: http://commons.wikimedia.org/wiki/File:Cloud_types.jpg Thunderstorms • What type of cloud causes these? • Consists of gusty winds, heavy rain and hail. • Can result in a tornado Picture taken from: http://www.fairfield.k12.ct.us/Rogerludlowe/ crogerludlowe03/webquests/Weather/ thunderstorm.jpg