Greenhouse Effect and Greenhouse Gases. GREENHOUSE FFECTFFECT.

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Presentation transcript:

Greenhouse Effect and Greenhouse Gases

GREENHOUSE FFECTFFECT

Main Greenhouse Gases Greenhouse GasChemical formula Anthropogenic sources (examples) Atmospheric Lifetime (years) GWP (100 year time horizon) Carbon DioxideCO 2 Fossil fuel combustion, deforestation, cement production Methane CH 4 fossil fuels, landfills, animal husbandry 1221 Nitrous OxideN2ON2Ofertilizer, fossil fuel combustion Fluorinated Gases variousindustrial processes various Global Warming Potential (GWP) is measure of how much a given mass of greenhouse gas is estimated to contribute to global warming. It is a relative scale which compares the gas to that of the same mass of carbon dioxide (whose GWP is by convention equal to 1).

Temperature and CO 2 Trends

Long-term trends in CO 2 concentrations and temperature

Modeled Observed Temperature and

Human vs. Natural Influences on Climate

Global and Continental Temperature Change

Projected increase in CO 2 concentration 800,000 years of carbon dioxide concentration

Sea Level Rise and Arctic Sea Ice

Change in Mean Global Sea Level

Sea Level Rise Global mean sea level in past and projected for future

Sea Ice Decline

Greenhouse Gas Emissions

Global Greenhouse Gas Emissions, 1970 to 2004

2006 U.S. GHG Emissions by Source U.S. Transportation GHG Emissions by Source

Greenhouse Gas Emissions by Country, 1990 and 2008