weather and climate
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Weather and Climate. Glenco Chapter 17 Pearson Chapter 24. Earth’s Atmosphere. The air is a mixture of gases, Nitrogen, Oxygen and trace gases. Microorganisms produce the gases. The theory is that over time the atmosphere developed into the air we now breath. - PowerPoint PPT PresentationTRANSCRIPT
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Weather and Climate
Glenco Chapter 17Pearson Chapter 24
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Earth’s Atmosphere
• The air is a mixture of gases, Nitrogen, Oxygen and trace gases.
• Microorganisms produce the gases.• The theory is that over time the atmosphere
developed into the air we now breath.
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http://www.asc-csa.gc.ca/eng/educators/resources/spacesuit/composition.asp
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Atmospheric structure
• Weather takes placein the Troposphere.• Ozone is in theStratosphere.As altitude increases,Air pressure and density Decrease.
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Latitudes and Longitudes
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Latitude and Longitude• These affect the climate based on the angle of
the Sun’s rays.
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Heating (energy in) the Atmosphere
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Wind
• Winds are caused by differences in air pressure
• Local Winds: are caused by unequal heating of the earth’s surface in a small area.
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Global Winds
• Winds that blow over long distances from a specific direction.
• Move in huge bands called convection cells• Warm air at the equator rises and replaced by
cooler air.• Called, Trade winds,Westerlies, and polar
easterlies
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http://www.weatherwizkids.com/weather-wind.htm
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Water in the Atmosphere
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Humidity
• The amount of water vapor in the air• This can condenses as dew, frost or fog if the
air temperature drops.
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Cloud formationhttp://www.vivoscuola.it/us/rsigpp3202/umidita/lezioni/form.htm
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Classifying clouds
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• Using your book add details to the types of clouds. Pg 762-763
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Weather Patterns
• Pg 765- 771 in Pearson book• Answer 24.5 assessment questions 1-6 pg 771
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Climates
• Two things determine a regions climate:• Temperature and Precipitation
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Temperature
• Latitude• Distance from large bodies of water• Ocean currents• altitude
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Precipitation• Latitude• Distribution of air pressure systems• Global winds• Mountain barriers
http://mycozynook.com/102RGCh34OH.htm
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El Nino
• Warming of water in central and eastern Pacific Ocean
• A current of water moves west • Causes a different weather pattern
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Global Warming now called Climate Change
• One possible theory is the increase of Co2 and other gases in the atmosphere is causing climate change.
• The green house effect.
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Possible cures
• Energy Conservation• Alternative non carbon producing power
sources: Please list them for yourselves.• Reduce the amount of gases produced.
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Research
• Using your laptops please research and write a one paragraph summation of current US policy addressing Climate Change.
• Google: “current US policy on climate change”
• EPA.gov/ climate change