* chlorofluorcarbons (CFCs) : 15- 35% - from refrigerants ( close to the atmospheric window)
* nitrous oxide (N2O): 5% - from fertilizers and fossil duel combustion
18. What is the atmospheric window and what is its significance in global warming?
the region of the EM spectrum where neither carbon dioxide nor water vapor absorbs, but cfcs do
n terms of global climate change, what is meant by forcing?
The process of changing global temperature
What are some of the scenarios and models of global warming that have been developed?
Describe the 8 feedback cycles discussed and shown in the figure in your text.
Describe how these forces can affect global climate: solar activity: changes in olar activity, sunspots aerosols and volcanoes: methane: stored in the ocean floor and permafrost human activities: burning fossil fuels and deforestation - increases global warming
solar activity: changes in olar activity, sunspots
aerosols and volcanoes:
methane: stored in the ocean floor and permafrost human activities: burning fossil fuels and deforestation - increases global warming
What is El Nino?
periodic slaken of trade winds in tropical pacific
What are some of the effects of an El Nino?
water becomes much warmer and global weather patterns shif
What are some of the potential effects of global climate change?
* shifts in temperature & precipitation patterns
* more severe hurricanes
* melting of ice land
* shifts in ranges of wild life
* life on earth
What adjustments we will have to make?
Bleach coral reefs
What is being done to address global warming?
reduce the GHG emissions, plant forests, and stop deforestation
What was the goal of the Kyoto Protocol?
international agreement ro reduce GHG
What is happening in Durban, South Africa right now?????
a conference about the GHG and Global warming that’s going on now
Some useful terms used while discussing the Earth’s climate:Aerosol: liquid or solid suspended particles, e g dust, soot. Aerosols can block solar radiation and cool atmosphere
* Albedo: measure of how much light is reflected from a surface
* CFCs (halocarbons)- an anthropagenic GHG that closes the atmospheric window
* Coriolis effect: Due to Earth’s rotation, deflect right in N hemisphere and left in S hemisphere
* El Nino/Southern Oscillation (ENSO)- periodic slacken of trade winds in tropical Pacific, water becomes much warmer and global weather patterns shift
* Goldilock’s Principle- just right
* Ice-albedo feedback- build up of ice reflects solar radiation and leads to more ice buildup, change is amplified
* insolation: incomming solar radiation
* IPCC (Intergovernmental Panel and Climate Change)-
* Infrared radiation, long wave radiation- electromagnetic radiation with wavelengths of 4-200mm
* Mauna Loa Observatory: volcano in Hawaii, site of CO2 measurements showing seasonal change in concentration and increase in concentration.
* Methane- anthropagenic GHG
* Milankovitch cycles:Variations in Earth’s orbit and wobble in Earth’s tilt produce ice to build up in N hemisphere, periodic ice ages
* Nitrous oxide- Anthropagenic GHG? increases global warming
* Ocean conveyer belt:differences in temperature and density cause sinking and upwelling of ocean water, current redistribute heat energy
* Solar radiation, electromagnetic radiation
* Sulfur dioxide: can cause acid rain due to the sulfur content
* Water vapor feedback:Increase in temp increases evaporation, increased H2O vapor increases temperature, which increases H2O vapor, etc