Old Rocks
Diamond Member
And no response at all to a 40% increase in the primary greenhouse gas? Yes, the earth's climate responds to small changes in the solar output. That is why we should be seeing a cooling right now like that we saw between 1940 and 1970. But we are not. We are seeing an accelerating warming.
And, by the way, if we are still responding to minor increase in solar output between 1850 and 1940, why did it cool from 1940 to 1970? That could not be from particulate matter that mankind put in the air could it? And if we can affect the temperature of the Earth from particulate matter, then what makes you think that our changing the composition of the atmosphere to the point that we have 40% more GHGs is not going to have an affect?
Climate Change: A Summary of the Science - Publications - The Royal Society
Climate forcing by greenhouse gas changes
28 Changes in atmospheric composition resulting from human activity have enhanced the
natural greenhouse effect, causing a positive climate forcing. Calculations, which are
supported by laboratory and atmospheric measurements, indicate that these additional
gases have caused a climate forcing during the industrial era of around 2.9 Wm-2, with
an uncertainty of about ±0.2 Wm-2. Other climate change mechanisms resulting from
human activity are more uncertain (see later); calculations that take into account these
other positive and negative forcings (including the role of atmospheric particles) indicate
that the net effect of all human activity has caused a positive climate forcing of around
1.6 Wm-2 with an estimated uncertainty of about ±0.8 Wm-2.
29 Application of established physical principles shows that, even in the absence of
processes that amplify or reduce climate change (see paragraphs 12 & 13), the climate
sensitivity would be around 1oC, for a doubling of CO2 concentrations. A climate forcing
of 1.6 Wm-2 (see previous paragraph) would, in this hypothetical case, lead to a globallyaveraged
surface warming of about 0.4oC. However, as will be discussed in paragraph
The Royal Society Climate change: a summary of the science I September 2010 I 6
36, it is expected that the actual change, after accounting for the additional processes,
will be greater than this.
Whaaaa? To borrow a phrase from Jon Stewart, please show how CO2 raises the temps. Vostock says warming first then CO2 rise 800 years after the fact. We are 800 years after the MWP, according to the Vostock cores the CO2 we see now is from the MWP.
Prove me wrong.
Don't have to. Tyndall did about 150 years ago.