I know change bothers or scares some but I do not prefer to bury my head in the sand.

All the science, physics and chemistry, supports the AGW theory. AGW is as close to fact as we can be and it is about time we started doing something about it.

The only scientists disputing AGW are those in the pay, directly or indirectly, of fossil fuel interests. Lots of cranks disputing it, like Lees and his denialist websites.

If AGW were not real why is the earth heating up and why is the polar ice disappearing and why are nearly all glaciers retreating? This after decades of the sun being quiescent?

Lees is into denial and crank science, quack science or pseudoscience, take your pick. I don’t think you are.

I think you are scared of AGW and the changes it is going to bring. The quicker we start doing something, reducing GHG emissions and adapting to AGW because the heat will be here for a while. Read over the science I have posted, read some of the links. Scary or not AGW is not going away.

Re your chart of CO2 from Cambrian time to present, have you done as I suggested and consider the changes to the globe and to the sun in the over 500 million years since the Ordovician/Silurian?

Page 198 FAQ 2.1 - How Do We Know the World Has Warmed?
"Evidence for a warming world comes from multiple independent climate indicators, from high up in the atmosphere to the depths of the oceans. They include changes in surface, atmospheric and oceanic temperatures; glaciers; snow cover; sea ice; sea level and atmospheric water vapour. Scientists from all over the world have independently verified this evidence many times. That the world has warmed since the 19th century is unequivocal."

Page 218 FAQ 2.2 - Have There Been Any Changes in Climate Extremes?
"There is strong evidence that warming has lead to changes in temperature extremes—including heat waves—since the mid-20th century. Increases in heavy precipitation have probably also occurred over this time, but vary by region. However, for other extremes, such as tropical cyclone  frequency, we are less certain, except in some limited regions, that there have been discernable changes over the observed record."

his all makes perfect sense to me, and I am reasonably confident that as further data is gathered, that we will find more evidence to tie temperature extremes to weather extremes.

If you recall, I never held this up as "proven", I simply stated that this was the current position. Science isn't magic, it's a laborious process, and this is just the start for climatology.

Why are you asking me? I seriously doubt there is a nefarious reason.

I'm surprised. So far you haven't turned to personal slurs in our exchanges.

You never post science, lees, just denialist pseudoscience.

Graphs of temperature v CO2 show a more or less linear relationship, it is denier sites now claim a log relationship.

Spectrometry SHOWS CO2, CH4 etc absorbing IR. THAT is the science!

Quiescent sun yet warming is continuing.



AGW is warming the world and only fools and scoundrels would deny that.

A theory with many streams of evidence to support it and a demonstrated mechanism for it.

Until the Industrial Revolution, melting of snow and ice at the end of cyclical glacial periods was driven by changes in the Earth’s orbit. As snow and ice melted on the planet, the albedo, or reflectivity, of the earth declined, with land and ocean absorbing more heat from the sun (think the reflectivity of cars in a parking lot versus the hot blacktop of the parking lot itself). As the planet slowly warmed, a warmer and better-mixed ocean released CO2 into the atmosphere, which amplified the warming that was already in progress. In all, temperature typically increased by 6°C (11° F) over thousands of years during these interglacial periods, and one third of this increase was a result of the CO2 that outgassed from the ocean once warming began. Therefore, CO2 was not the initial cause of melting ice on the planet. It merely amplified a signal that was already in progress.

By contrast, as humans burn fossil fuels, we are creating a new driver of snow and ice melt and accompanying sea-level rise. This time, additional CO2 entering the atmosphere is coming from sources of carbon that had previously been sequestered in fuels such as oil and gas. We know from basic physics that CO2 traps heat. The phenomenon is perhaps best demonstrated by Earth’s neighbor Venus. If we lived on Venus, the computer you’re reading this post on now would be melting. That’s because Venus has 100,000 times the amount of CO2 in its atmosphere as Earth does and its average temperature of 462° C (863° F) is high enough to melt lead.