greengouse gases???

Question

hey ppl...can you name some greenhouse gases??

Answer 1

Greenhouse gases naturally blanket the Earth and keep it about 33 degrees Celsius warmer than it would be without these gases in the atmosphere. This is called the �Greenhouse Effect�. Over the past century, the Earth has increased in temperature by about .5 degrees Celsius and many scientists believe this is because of an increase in concentration of the main greenhouse gases.

Greenhouse gases are

*Carbon Dioxide (CO2)

* Methane (CH4)

* Nitrous Oxide (NO)

* Fluorocarbons
Many of these compounds, such as chlorofluorocarbons(CFC�s)
* water Vapour

Examples of the atmospheric lifetime and GWP for several greenhouse gases include:

* CO2 has a variable atmospheric lifetime (approximately 200-450 years for small perturbations). Recent work indicates that recovery from a large input of atmospheric CO2 from burning fossil fuels will result in an effective lifetime of tens of thousands of years.[10][11] Carbon dioxide is defined to have a GWP of 1 over all time periods.
* Methane has an atmospheric lifetime of 12 ± 3 years and a GWP of 62 over 20 years, 23 over 100 years and 7 over 500 years. The decrease in GWP associated with longer times is associated with the fact that the methane is degraded to water and CO2 by chemical reactions in the atmosphere.
* Nitrous oxide has an atmospheric lifetime of 120 years and a GWP of 296 over 100 years.
* CFC-12 has an atmospheric lifetime of 100 years and a GWP(100) of 10600.
* HCFC-22 has an atmospheric lifetime of 12.1 years and a GWP(100) of 1700.
* Tetrafluoromethane has an atmospheric lifetime of 50,000 years and a GWP(100) of 5700.
* Sulfur hexafluoride has an atmospheric lifetime of 3,200 years and a GWP(100) of 22000.

Answer 2

The major greenhouse gases in the atmosphere are carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), chlorofluorocarbons (CFCs) and ozone (O3). Atmospheric water vapour (H2O) also makes a large contribution to the natural greenhouse effect but its presence is not directly affected by human activity. The Greenhouse Effect is a term that refers to a physical property of the Earth's atmosphere. The atmosphere contains a suite of gases called greenhouse gases which affect the overall energy balance of the Earth's system by absorbing infra-red radiation. In its existing state, the Earth-atmosphere system balances absorption of solar radiation by emission of infrared radiation to space . Due to greenhouse gases, the atmosphere absorbs more infrared energy than it re-radiates to space, resulting in a net warming of the Earth-atmosphere system and of surface temperature. This is the Natural Greenhouse Effect However, problems arise when the atmospheric concentration of greenhouse gases increases. With more greenhouse gases released in the atmosphere due to human activity, more infrared radiation will be trapped in the Earth's surface which contributes to the Enhanced Greenhouse Effect.

Answer 3

Water vapour,carbon dioxide,methane,nitrous oxide,chlorofluorocarbon

Answer 4

These are all greenhouse gases:

Carbon dioxide (CO2)

Methane (CH4)

Nitrous oxide (N2O)

Hydrofluorocarbons (HFCs)

Perfluorocarbons (PFCs)

Sulphur hexafluoride (SF6)