Weather Temperature Controls May 6 2008 Temperature Temperature

Temperature • Temperature is the measure of the average kinetic energy of the particles

Temperature Controls • Factors that exert a strong influence on temperature include latitude, heating

Latitude • Because the axis remains pointed toward the North Star as Earth moves

Heating of Land Water • Land heats more rapidly and to higher temperatures than

Compare Using a Graph • What does the left axis indicate? • What does

Geographic Position • The geographic position can greatly influence temperatures experienced at a specific

Altitude • These two cities have different altitudes. • Which one has a higher

$Cloud Cover and Albedo • Albedo is the fraction of total radiation that is$

Isotherms • Isotherms are lines that connect points that have the same temperature.

Assignment • Read pg. 488 -493 • Complete 17. 3 ws

Slides: 12

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Weather Temperature Controls May 6, 2008

Temperature • Temperature is the measure of the average kinetic energy of the particles of an object. • Think of a thermometer as a speedometer! • A temperature control is any factor that causes temperature to vary from place to place and from time to time. • What do you think are some temperature controls?

Temperature Controls • Factors that exert a strong influence on temperature include latitude, heating of land water, altitude, geographic position, cloud cover, and ocean currents.

Latitude • Because the axis remains pointed toward the North Star as Earth moves around the sun, the position of Earth’s axis to the suns rays is constantly changing. • Flashlight Demonstration

Heating of Land Water • Land heats more rapidly and to higher temperatures than water. Land also cools more rapidly and to lower temperatures than water. • How can this difference affect the temperature? (Remember the heat source for the troposphere!)

Compare Using a Graph • What does the left axis indicate? • What does the right axis indicate? • What does the bottom axis indicate? • What do the curves indicate about the climates of each city?

Geographic Position • The geographic position can greatly influence temperatures experienced at a specific location. • Windward vs. Leeward • Mountain barriers

Altitude • These two cities have different altitudes. • Which one has a higher altitude? • What is the relationship between altitude and temperature?

$Cloud Cover and Albedo • Albedo is the fraction of total radiation that is$

Cloud Cover and Albedo • Albedo is the fraction of total radiation that is reflected by any surface. • Many clouds have a high albedo, and therefore reflect a significant portion of the sunlight that strikes them back to space. • At night, clouds have the opposite effect, and reflect outgoing radiation emitted by Earth back to Earth.

Cloud Cover and Albedo Illustrated

Isotherms • Isotherms are lines that connect points that have the same temperature.

Assignment • Read pg. 488 -493 • Complete 17. 3 ws