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The Atmosphere Shreya Patel.

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Presentation on theme: "The Atmosphere Shreya Patel."— Presentation transcript:

1 The Atmosphere Shreya Patel

2 Composition Nitrogen-78%: fundamental for living organisms
Oxygen-21%:produced through photosynthesis Water Vapor 0-4%:higher or lower depending on region Carbon Dioxide <<1%: currently increased due to fossil fuels, greenhouse gas Methane-<<<1%: greenhouse gas-400 million tons per year Nitrous Oxide-<<<1%: greenhouse gas-6million tons per year Ozone-<<<1%: absorbs harmful UV radiation form the sun, very important, depleted due to photochemical smog

3 Ionosphere (aurora)

4 Layers Troposphere- 0-7 miles above the surface, 75% of the atmosphere’s mass is in the troposphere, weather occurs here Stratosphere- temperature increases with altitude due to absorption of heat by ozone, contains the ozone layer Mesosphere- temperature decreases with altitude, meteors burn up in this layer Thermosphere (Ionosphere) – temperature increases with altitude due to gamma rays, X-Rays, and UV Radiation, northern lights aurora occurs here


6 Weather Where does weather occur? THE TROPOSHERE
Weather is-caused by the movement or transfer of heat energy which influences temperature, air pressure, humidity, precipitation, etc. -Energy can be transferred through Radiation (solar energy), Conduction (collisions of heat-carrying molecules), or Convection (primary way energy is transferred from hot to cold) Regions near the equator receive the most solar energy.

7 Factors that Influence Climate
Air Mass-large body of air with similar temperature and moisture content Air Pressure- decreases with altitude, low pressure causes stormy weather, high pressure creates fair weather Albedo- reflectivity- snow and ice have high albedo Altitude- greater altitude equal colder temperature Angle of Sunlight- areas close to equator receive most sun Carbon Cycle- carbon dioxide increases warming Clouds- hold water vapor, cause rain (high level clouds are ice crystals) Distance to Oceans- the closer to an ocean, the more humid an area is Fronts- cold fronts, warm fronts

8 Land Changes- deforestation and urbanization
Landmass Distribution- different materials absorb different amounts of heat Latitude- the higher, the less solar radiation Location Humidity- moisture traps in heat causing warmth Mountain Ranges- effects rain receiving, mountain altitude makes cooler air, shadows make cooler air Plate Tectonics and Volcanoes- produce carbon dioxide creating warming Wind Patterns Earths Rotation Human Caused problems- pollution

9 Factors of Climate Video

10 Major Climate Periods 2,000,000 B.C.E to 12,000 B.C.E= Pleistocene Ice Age- large glacial ice sheets covered North America, Europe, and Asia 12,000 B.C.E to 3000 B.C.E- The Earth started to warm up after the ice age.


12 Coriolis Effect -the influence of Earth's rotation, which tends to turn air and water toward the right in the Northern Hemisphere and toward the left in the Southern Hemisphere

13 Atmospheric Pollution
Atmospheric pollution can be defined as the introduction into the atmosphere of chemicals, particulate matter, or biological material that are harmful or humans and other living organism, as well as damage the environment. The main pollutant is fossil fuels. (sulfur oxides, nitrogen oxides, carbon monoxide, carbon dioxide, methane and other volatile organic compounds(VOCs), particulate matter, persistent free radicals, and heavy metals.) 2.4 million people die each year from diseases caused, or made worse, by atmospheric pollution.

14 The first picture shows space junk around the Earth
The first picture shows space junk around the Earth. Second shows an ozone hole. The one above this is photo- chemical smog.

15 Some strange but helpful YouTube videos
Just in case you didn’t know the difference between temperature and climate. Just in case you didn’t know the layers of the atmosphere.

16 Helpful Sites and Study Aides for the Atmosphere
1/textbook/atmosphere/atmospheric_compositio n.html science-atmosphere-and-winds-flash-cards/

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