Very little, CO2 does retain heat, but most of it's work was done with the first 100ppm because the warming effect of CO2 declines with concentration, Scientists state that a doubling of CO2 will increase our earth's temperature by 3.7watts per sq meter which is equal to 1 degree C. they have to use water vapor positive feedback to make it scary, but since 1950 water vapor evaporation rates have been decreasing http://hockeyschtick.blogspot.com/2014/0...
The greenhouse effect refers to circumstances where the short wavelengths of visible light from the sun pass through a transparent medium and are absorbed, but the longer wavelengths of the infrared re-radiation from the heated objects are unable to pass through that medium. The trapping of the long wavelength radiation leads to more heating and a higher resultant temperature. Besides the heating of an automobile by sunlight through the windshield and the namesake example of heating the greenhouse by sunlight passing through sealed, transparent windows, the greenhouse effect has been widely used to describe the trapping of excess heat by the rising concentration of carbon dioxide in the atmosphere. The carbon dioxide strongly absorbs infrared and does not allow as much of it to escape into space.
On average, Earth will become warmer. Some regions may welcome warmer temperatures, but others may not.
Warmer conditions will probably lead to more evaporation and precipitation overall, but individual regions will vary, some becoming wetter and others dryer.
A stronger greenhouse effect will warm the oceans and partially melt glaciers and other ice, increasing sea level. Ocean water also will expand if it warms, contributing further to sea level rise.
Meanwhile, some crops and other plants may respond favorably to increased atmospheric CO2, growing more vigorously and using water more efficiently. At the same time, higher temperatures and shifting climate patterns may change the areas where crops grow best and affect the makeup of natural plant communities.
Predicting the consequences of global warming is one of the most difficult tasks for the world’s climate researchers. This is because the natural processes that cause rain, hail and snow storms, increases in sea level and other expected effects of global warming are dependent on many different factors.
Sea level rises because of melting ice and snow and because of the thermal expansion of the sea (water expands when warmed). Areas that are just above sea level now, may become submerged.
The warmer climate will probably cause more heatwaves, more violent rainfall and also an increase in the number and/or severity of storms.
The models have predicted, and it has come to pass:
That the globe would warm, and about how fast, and about how much.
That the troposphere would warm and the stratosphere would cool.
That nighttime temperatures would increase more than daytime temperatures.
That winter temperatures would increase more than summer temperatures.
Polar amplification (greater temperature increase as you move toward the poles).
That the Arctic would warm faster than the Antarctic.
The magnitude (0.3 K) and duration (two years) of the cooling from the Mt. Pinatubo eruption.
They made a retrodiction for Last Glacial Maximum sea surface temperatures which was inconsistent with the paleo evidence, and better paleo evidence showed the models were right.
They predicted a trend significantly different and differently signed from UAH satellite temperatures, and then a bug was found in the satellite data.
The amount of water vapor feedback due to ENSO.
The response of southern ocean winds to the ozone hole.
The expansion of the Hadley cells.
The poleward movement of storm tracks.
The rising of the troposphere and the effective radiating altitude.
The clear sky super greenhouse effect from increased water vapor in the tropics.
The near constancy of relative humidity on global average.
That coastal upwelling of ocean water would increase.
Look at a graph of temperatures predicted with and without human influences.
Plants get the opportunity to grow longer and produce more, leading to a shortage of CO2 and an abundance of oxygen.
The greenhouse effect is what makes the planet livable Without it we would all freeze to death.
http://en.wikipedia.org/wiki/Greenhouse_...
Global warming, what this forum is about concerns the extra greenhouse gases produced by humans that are responsible for the current warming of the planet.
http://en.wikipedia.org/wiki/Global_warm...
Nobody has proven anything. If you are satisfied with unscientific speculation, then the earth has warmed up approximately 0.8 degrees in a century and a half. But in reality that rise was more likely due to Sun activity than AGW or Climate Change.
Heat is kept in the atmosphere.
*more in depth*
Keeps heat in the atmosphere, preventing temperature extremes.
Plato.
