IB - Enviromental System and Socieities - TOPIC 6 global warming

Topics: Global warming, Greenhouse gas, Carbon dioxide Pages: 3 (397 words) Published: December 9, 2013

GHG gases:
Carbon dioxide
Water vapor

Function: they allow short wavelengths of radiation to pass through the Earth, but they trap the longer wavelengths that are radiated from the earth. (Greenhouse effect) Greenhouse effect
The GHGs allow short wavelengths of radiation to pass thought the Earth’s surface. It regulates the Earth’s temperature keeping conditions warmer than without the effect and more hospitable to life. Examples of greenhouse gases

Carbon dioxide CO2
Methane CH2
Nitrogen oxides, NOx
Chlorofluorocarbons (CFCs)
Global Warming
An increase of average temperature of the earth’s atmosphere Global mean temperature
Earth thermal balance
Factors that influence the temperature:
Solar energy influx (input)
Chemistry of the atmosphere changes (outputs)
Albedo (output)

The variation in themperature lead to anomalies:
Positive  Warming
Negative  Cooling
Dangerous because species do not have time to adapt
The ability of the Earth’s surface to reflect light
- opposite relation with the global temperature which means: Increased albedo leads to decrease in global temperature
Decreased albedo leads to increase in global temperature

Anthropogenic source
Is how humans impact global warming.
1. GHGs
Burning fossil fuels
Fridge coolants, aerosol cans
2. Rice farming, Landfil
Produce methane
3. Use of fertilizers
nitrous oxides form decomposition of fertilizers
4. Albedo and hardsurfaces
Heat sinks caused by artificial landscape

Effects of increasing temperature (environment)
Biome shifting
Changing weather patterns
Spread of tropical diseases and pests
Influencing productivity of biomes
Rising sea level
Increase severity and number of storms
Effects of increasing temperature (social)
Scarcity of water
Agricultural areas may shift
Costal area may be flooded
The Intergovernmental Panel on Climate Change (IPCC)
It brings together...
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