Atmospheric movement and weather maps
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When air masses meet, fronts are formed. Most severe weather occurs near frontal boundaries. Cold fronts bring stormy weather as cold air pushes warm air aloft, while warm fronts bring steady precipitation as warm air slides over cold air. Stationary fronts occur when neither air mass can overcome the other, bringing long periods of clouds and rain.
Atmospheric movement and weather maps
- 2. *When convection and winds cause air masses to move, they bump into one another. *The area where two air masses meet is called a front. *Most severe weather occurs near frontal boundaries. *
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- 5. *Cold, dense air is moving toward warm, less dense air. *The warm air is pushed up to cool and form clouds as the cooler air replaces it. *The air on the front side of the boundary line is warmer than the air on the back side of the boundary line. *These fronts are usually fast moving and bring stormy weather and heavy precipitation followed by clearing skies and higher pressure. *
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- 8. *Warm air is moving toward cold air. *The warm, less dense air slides over the cold, more dense air. *The air on the front side of the boundary line is cooler than the air on the back side of the boundary line. *These fronts usually move slowly and bring steady rain or snow over many days. *
- 9. *Warm and cool air masses that are not strong enough to move one another *Sits still for a long period of time *
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- 11. *These fronts occur when neither the cool nor warm air masses are strong enough to replace each other. *They tend to stay in an area for a long period of time, often bringing long periods of precipitation and clouds. *
- 12. * Two cooler air masses meet and force a warm air mass aloft. * Brings cool temperatures and large amounts of rain or snow. * Followed by clear skies and drier air. *
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- 14. *This is when a warm air mass is caught between two cold air masses. *The colder air mass moves under the warm air mass and pushes it up. *The colder air mass then moves forward until it meets a cold air mass that is warmer and less dense. *The colder air mass moves under this air mass and pushes it up. *Brings clear skies and drier air. *
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- 18. *The heating and cooling of water and land produces land breezes and sea breezes. *High pressure moves toward low pressure, pushing the warm air upward. *As warm air rises, cooler air moves in and replaces it. *
- 19. *The Sun heats the water and land every day. *Land heats up rapidly, but cools off rapidly. *Desert *Water heats up slowly, but cools off slowly. *Swimming at night *The heat retained by the oceans is what keeps our planet insulated. *
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- 21. *Weather is the atmospheric condition at a certain time and place. *Weather maps are used to show current weather conditions in an effort to predict future weather conditions. *You need to know what each symbol means and how to interpret them to forecast the weather. *
- 22. *Air pressure is measured with a barometer in millibars. *Millibars are represented by connected lines of equal pressure. This is a lot like the topographic map lines. *The closer together the lines are, the faster the wind speed. *The farther apart the lines are, the slower the wind speed. *
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- 24. *Cooler, dense air close to the surface of the Earth. *Surrounded by winds flowing in a clockwise direction. *Usually brings dry conditions and fair skies. *
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- 26. *Warmer, less dense air above the Earth’s surface *Surrounded by winds moving in a counterclockwise direction. *Associated with the formation of storms. *
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Editor's Notes
- #13: p. 573 in the textbook