1. There has been an increase in temperature. This has been demonstrated by land, sea, air, and space based measurement systems, by instrumental records stretching back to the 1800s, by determinations of global climate based on tree growth patterns, by the thinning sea ice of the arctic, the advancement of tree lines farther north, changes in migration patterns of birds and other animals, changes in flowering dates of plants, increased glacial melt, and rising sea levels.

2. The idea that trapping heat necessarily implies a rise in temperature is also flawed. Although much of the energy does cause a temperature rise, this is not the only consequence of trapping heat. It is possible to trap heat without raising temperature. These are known as isothermal processes.

CO2 has risen ~40% over the last 100+ years much of that rise actually happened in just the last 50 years, the same is also true of the rise in temp 0.8c with the larger portion happening from the 1970's onward.

That is a rise of 0.8c caused by roughly 120ppm of a CO2, but at the now current rate of rise we are set to see a rise of of 250-300ppm over the next 100 years. With the rate of temp rise several times faster at the poles.

Both main ice sheets (Antarctica & Greenland) are shrinking, the Arctic sea ice is also shrinking, the Antarctic sea ice is slowly expanding, due in part to the cool fresh water runoff from the Antarctic glaciers melting.

As we continue to warm we will see more Arctic tundra melted which in turn releases methane.

More exposed sea will warm further and increase the warming effect

http://nsidc.org/arcticseaicenews/files/...

Last year denier said it was cooling, we had the 4th warmest year recorded

This year deniers tried more of the same, now we look set to have the warmest year on record.

http://www.ncdc.noaa.gov/sotc/global/201...

Noah, sadly I don't think they want to understand this point (heat energy) as if they tried to, their house of cards theories would fall down around their ears.

When you turn on a oven to bake cookies etc, you might push 350 for the temperature, but it takes time to warm up, even though the heat is on at full blast.

There has been an increase in temperature on earth, but like an oven, it takes time once you have imputed a temperature to see the real results.

Your question is flawed in two ways.

1. There has been an increase in temperature. This has been demonstrated by land, sea, air, and space based measurement systems, by instrumental records stretching back to the 1800s, by determinations of global climate based on tree growth patterns, by the thinning sea ice of the arctic, the advancement of tree lines farther north, changes in migration patterns of birds and other animals, changes in flowering dates of plants, increased glacial melt, and rising sea levels.

2. The idea that trapping heat necessarily implies a rise in temperature is also flawed. Although much of the energy does cause a temperature rise, this is not the only consequence of trapping heat. It is possible to trap heat without raising temperature. These are known as isothermal processes.

Your question is about the refers to about 1880 to current: the past 135 years. (CO2 was at 280 ppm in about 1880). Over that time, global temperatures of the surface troposphere have indeed increased. Over the entire period, the increase was at a linear trend rate of about 0.7 degrees per century. Over the past 30 years the rate has accelerated to 1.5 degrees per century.

Keep in mind that 90% of the increased heat in the environment goes into the oceans. The warming of the oceans is evidenced by rising sea level.