THE ATMOSPHERE

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THE ATMOSPHERE
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Designed by Wai Cho Kwong
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What is the weather today? What is the difference
between weather and climate? What is the
atmosphere?
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1. Structure of the atmosphere
Explore
2. Composition of the atmosphere
Explore
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DISCUSSION Presentation

• Based on the materials you have read on the
  internet,
• Discuss how, and with what effect, is the
  composition of the atmosphere being altered by
  human activity.
• Suggest measures which could and should be taken
  to restrict the potential damage caused by
  increasing the amount of carbon dioxide in the
  atmosphere.

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Further Study
Exercise
More Information
Useful Links
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USEFUL LINKS
  About greenhouse effect http//www.weather.gov.
hk/wxinfo/climat/greenhs/e_grnhse.htm   http//www
.fsl.noaa.gov/osborn/CLIMGRAPH2.html     More
about weather and climate http//archive.ncsa.uiu
c.edu/edu/RSE/RSEred/WeatherLesson1.html   http//
www.weather.org.hk/   http//pages.prodigy.net/pme
dina/weather.htm   http//archive.globe.gov/sda-bi
n/wt/ghp/tgL(en)UP(atmosphere/Contents)   http/
/ww2010.atmos.uiuc.edu/(Gh)/home.rxml   http//www
.windows.ucar.edu/cgi-bin/tour_def/earth/Atmospher
e/weather.html (with crossword puzzle)   http//ww
w.fed.cuhk.edu.hk/geo/mainPage.shtml
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Diagram

• The Structure of the atmosphere
• Troposphere
• Stratosphere
• Mesosphere
• Thermosphere

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Troposphere

• Sea level to 13 km
• Temperature decrease by 6.4 oC/1000m
• Because the surface is warmed by insolation first
• Contains most of the atmosphere mass
• Most of climatic phenomena take place
• Marked by the boundary called tropopause

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Stratosphere

• 13 km to 48 km above ground
• Temperature inversion
• Concentration of ozone (O3)
• Absorbs incoming ultra-violet radiation
• Burn meteroites
• Upper limit marked by stratopause

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Mesosphere

• Temperatures fall rapidly
• No mass to absorb incoming radiation
• Lowest temperature -90 oC
• Strongest wind speeds (nearly 3000km/h)
• Upper limit marked by mesopause

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Thermosphere

• Temperatures rise rapidly with height
• Reaching 1500 oC
• High concentration of atomic oxygen which absorbs
  ultra violet

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Composition of the atmosphere
VIDEO
COMPOSITION
Discussion
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Composition of the atmosphere
Graph
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Normal CO2 Content
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High CO2 Content
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