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4.4 Climate Change.

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Presentation on theme: "4.4 Climate Change."— Presentation transcript:

1 4.4 Climate Change

2 4.4.2 Methane and nitrogen oxides have less impact
4.4.1 Carbon dioxide and water vapor are the most significant greenhouse gases . Greenhouse gases: CO2 Carbon Dioxide H2O Water vapor CH4 Methane N2O Nitrous Oxide NO Nitric oxide 4.4.2 Methane and nitrogen oxides have less impact

3 What makes a good greenhouse gas is the ability to absorb long wave radiation, and the gases concentration 4.4.4 The warmed Earth emits longer wavelength radiation (heat)

4 4.4.5 Longer wave radiation is absorbed by greenhouse gases, which retain the heat in the atmosphere.

5 4.4.6 Global temperatures and climate patterns are influenced by concentrations of greenhouse gases
4.4.7 There is a correlation between rising CO2 levels and average global temperature.

6 4.4.8 Recent increases in atmospheric carbon dioxide are largely due to increases in the combustion of fossilized organic matter. The number one source of carbon emissions as a result of human activity is transport that is based on fossil fuels: cars, trucks, trains and airplanes. Other human activities that put CO2 into the air include: deforestation, heating with fossil fuels, meat diet, purchasing goods that require long transportation, commuting long distances. Human activities that contribute to other greenhouse gases: eating meat (methane), burning fossil fuels, using organic fertilizers (nitrogen oxides)

7 Changes in global sea levels over last 13 years

8 Threats to coral reefs Climate change is threatening the Earths coral reefs, can you give reasons why? Temperature changes Water depth pH changes. What is causing the pH change?


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