Official portion of CO2 in air is about 380 parts per million ( NOAA ESRL data ). Experiments intended to show it as a Green House Gas have shown a 5 degree difference when pitting normal air against 100% CO2. So I gave it a factor of 20% - even though after 20 minutes under the lamp it looks more like 11% (6/50). So I put it all together and figure that for 1 degree of AGW less than 76 millionths of a degree can be attributed to all CO2 (both man and nature);
and that doesn't take into account all the factors (convection, speed of heat release, weight, tendency to sink) that would make that number even smaller (perhaps even the lower limit as CO2 induced AGW approaches 0).

Question:
Do you agree with my math and assessment?

Choices:
I both understand and agree
I understand and disagree
I don't understand; but, it sounds good
I don't understand; and, am sure you must be wrong
I think you a nut for darring to question Al Gore and the IPCC

 

This is an excellent experiment. There a couple modifications you should make so that it is a better model of the earths green house effect.

1) Your experimental setup filters out the infrared radiation. 50% of solar radiation is contained in the infrared. There is no need for the water pans.

2) Glass filters out infrared radiation as well. Thin plastic film(Saran Wrap) should be used to cover the glass vessels. Thin plastic film does not block much infrared radiation.

Regards,

The problem with your example is that it is a closed system. Where the earth is an open system with a lot more factors affecting temperature. There are so many factors affecting the earth heating and cooling that the small effect from CO2 will never make much of a difference.

"The problem with your example is that it is a closed system"

That it is a closed system is what makes it a good test. This experiment that ed linked to is actually a pretty good representation of the carbon dioxide warming. Note that the experiment shows that the jar with the carbon dioxide does get significantly warmer in just a few minutes.

It would be an even better experiment, more representational of the earth, if insulated jars were used instead of just glass jars and thin plastic wrap was used for covers.

The greenhouse effect of carbon dioxide in the atmosphere is very well understood. It is the second most significant absorber of radiation in the atmosphere. Second only to water vapor. What makes its contribution to global warming so certain is that it is almost uniformly distributed throughout the atmosphere. From sealevel to 100,000 feet.
Ref. Atmospheric Propagation of Radiation, Smith.

quote:

Originally posted by ed34222:
Official portion of CO2 in air is about 380 parts per million ( NOAA ESRL data ). Experiments intended to show it as a Green House Gas have shown a 5 degree difference when pitting normal air against 100% CO2. So I gave it a factor of 20% - even though after 20 minutes under the lamp it looks more like 11% (6/50). So I put it all together and figure that for 1 degree of AGW less than 76 millionths of a degree can be attributed to all CO2 (both man and nature);
and that doesn't take into account all the factors (convection, speed of heat release, weight, tendency to sink) that would make that number even smaller (perhaps even the lower limit as CO2 induced AGW approaches 0).

I would add the rotation of the earth and by how much it wobbles, per "Chandler's Wobble". We will need to consider this too, because of the amount of sunray's falling to earth, like magnifying glass effect, or much larger area, making the pole areas cooler. All the human caused development will have to be considered if we want to understand the wobbling rotation of earth.