Can Scientists Prove man-made global warming?

Written by Kerry Jackson

There’s probably not a phrase that the global warming alarmists and dim celebrities trying to play the role of intellectuals use more than some variation of “the science is settled.” It’s a catchy phrase that’s intended to shut down debate and shame skeptics.

And it’s simply not true.

The alarmist community has had almost three decades to prove its assumptions, and while it is plausible that there has been a small measure of warming, the disaster many predicted hasn’t occurred. Worse for them, it’s impossible to say with any degree of certainty that the warming that has happened — and quite possibly there’s been none at all — was caused by man. Earth’s climate has warmed and cooled throughout its existence. It’s part of the natural cycle.

Yet the alarmist community persists and never acknowledges that it might be wrong. At the same time, when its members are pressed to prove that their one-way beliefs are indeed fact, they can’t do it.

Consider a recent exchange in Australia, in which a skeptic, parliament member Malcolm Roberts, asked scientists at the Commonwealth Scientific and Industrial Research Organization to convince him that there was proof of man-made global warming. With Roberts being a skeptic, the scientists naturally had a high hurdle to clear. But the response Roberts received was not particularly compelling.

The Sydney Morning Herald reported that Alan Finkel responded with the usual stale answers: Atmospheric carbon dioxide traps heat, CO2 emissions have increased, therefore man must be warming his planet.

Then the Morning Herald noted, in a paraphrase, that Finkel conceded that “the effect of warming on climate wasn’t clear.” It followed with a direct quotation from Finkel, which was actually an admission.

“We have models to try to predict what that will be and that’s difficult,” said Finkel.

Difficult. And wrong.

Finkel’s failure to complete the task that Roberts put before him is nothing new nor isolated. Greenpeace co-founder Patrick Moore has said there “is no scientific proof that human emissions of carbon dioxide are the dominant cause of the minor warming of the Earth’s atmosphere over the past 100 years,” while science writer Michael Fumento wrote convincingly three years ago that proof of global warming was evaporating.

What the alarmists call “proof” and “evidence” is nothing more than conjecture. They cannot prove that man’s activities have warmed the planet, even if the next 100 years are twice as hot as they have predicted. They can lay out their “evidence” as if in a courtroom, and urge the jury to make the connection.

But the fact they can’t get around is that there is more than enough reasonable doubt to throw out their prosecution. Carbon dioxide simply isn’t the only suspect. Earth’s climate system has far too many influences for the inquisitors to settle on just one.


Trackback from your site.

Comments (1)

  • Avatar



    Trenberth et al 2011jcli24 Figure 10
    This popular balance graphic and assorted variations are based on a power flux, W/m^2. A W is not energy, but energy over time, i.e. 3.4 Btu/eng h or 3.6 kJ/SI h. The 342 W/m^2 ISR is determined by spreading the average 1,368 W/m^2 solar irradiance/constant over the spherical ToA surface area. (1,368/4 =342) There is no consideration of the elliptical orbit (perihelion = 1,416 W/m^2 to aphelion = 1,323 W/m^2) or day or night or seasons or tropospheric thickness or energy diffusion due to oblique incidence, etc. This popular balance models the earth as a ball suspended in a hot fluid with heat/energy/power entering evenly over the entire ToA spherical surface. This is not even close to how the real earth energy balance works. Everybody uses it. Everybody should know better.
    An example of a real heat balance based on Btu/h follows. Basically (Incoming Solar Radiation spread over the cross sectional area) = (U*A*dT et. al. leaving the lit side perpendicular to the spherical surface ToA) + (U*A*dT et. al. leaving the dark side perpendicular to spherical surface area ToA) The atmosphere is just a simple HVAC/heat balance/insulation problem.
    “Technically, there is no absolute dividing line between the Earth’s atmosphere and space, but for scientists studying the balance of incoming and outgoing energy on the Earth, it is conceptually useful to think of the altitude at about 100 kilometers above the Earth as the “top of the atmosphere.” The top of the atmosphere is the bottom line of Earth’s energy budget, the Grand Central Station of radiation. It is the place where solar energy (mostly visible light) enters the Earth system and where both reflected light and invisible, thermal radiation from the Sun-warmed Earth exit. The balance between incoming and outgoing energy at the top of the atmosphere determines the Earth’s average temperature. The ability of greenhouses gases to change the balance by reducing how much thermal energy exits is what global warming is all about.”
    ToA is 100 km or 62 miles. It is 68 miles between Denver and Colorado Springs. That’s not just thin, that’s ludicrous thin.
    The GHE/GHG loop as shown on Trenberth Figure 10 is made up of three main components: upwelling of 396 W/m^2 which has two parts: 63 W/m^2 and 333 W/m^2 and downwelling of 333 W/m^2.
    The 396 W/m^2 is determined by inserting 16 C or 279K in the S-B BB equation. This result produces 55 W/m^2 of power flux more than ISR entering ToA, an obvious violation of conservation of energy created out of nothing. That should have been a warning.
    ISR of 341 W/m^2 enter ToA, 102 W/m^2 are reflected by the albedo, leaving a net 239 W/m^2 entering ToA. 78 W/m^2 are absorbed by the atmosphere leaving 161 W/m^2 for the surface. To maintain the energy balance and steady temperature 160 W/m^2 rises from the surface (0.9 residual in ground) as 17 W/m^2 convection, 80 W/m^2 latent and 63 W/m^2 LWIR (S-B BB 183 K, -90 C or emissivity = .16) = 160 W/m^2. All of the graphic’s power fluxes are now present and accounted for. The remaining 333 W/m^2 are the spontaneous creation of an inappropriate application of the S-B BB equation violating conservation of energy.
    But let’s press on.
    The 333 W/m^2 upwelling/downwelling constitutes a 100% efficient perpetual energy loop violating thermodynamics. There is no net energy left at the surface to warm the earth and there is no net energy left in the troposphere to impact radiative balance at ToA.
    The 333 W/m^2, 97% of ISR, upwells into the troposphere where it is allegedly absorbed/trapped/blocked by a miniscule 0.04% of the atmosphere. That’s a significant heat load for such a tiny share of atmospheric molecules and they should all be hotter than two dollar pistols.
    Except they aren’t.
    The troposphere is cold, -40 C at 30,000 ft, 9 km, < -60 C at ToA. Depending on how one models the troposphere, average or layered from surface to ToA, the S-B BB equation for the tropospheric temperatures ranges from 150 to 250 W/m^2, a considerable, 45% to 75% of, shortfall from 333.
    (99% of the atmosphere is below 32 km where energy moves by convection/conduction/latent/radiation & where ideal S-B does not apply. Above 32 km the low molecular density does not allow for convection/conduction/latent and energy moves by S-B ideal radiation et. al.)
    But wait!
    The GHGs reradiate in all directions not just back to the surface. Say a statistical 33% makes it back to the surface that means 50 to 80 W/m^2. A longer way away from 333, 15% to 24% of.
    But wait!
    Because the troposphere is not ideal the S-B equation must consider emissivity. Nasif Nahle suggests CO2 emissivity could be around 0.1 or 5 to 8 W/m^2 re-radiated back to the surface. Light years from 333, 1.5% to 2.4% of.
    But wait!
    All of the above really doesn’t even matter since there is no net connection or influence between the 333 W/m^2 thermodynamically impossible loop and the radiative balance at ToA. Just erase this loop from the graphic and nothing else about the balance changes.
    BTW 7 of the 8 reanalyzed (i.e. water board the data till it gives up the right answer) data sets/models show more power flux leaving OLR than entering ASR ToA or atmospheric cooling. Trenberth was not happy. Obviously, those seven data sets/models have it completely wrong because there can’t possibly be any flaw in the GHE theory.
    The GHE greenhouse analogy not only doesn’t apply to the atmosphere, it doesn’t even apply to warming a real greenhouse. (“The Discovery of Global Warming” Spencer Weart) It’s the physical barrier of walls, glass, plastic that traps convective heat, not some kind of handwavium glassy transparent radiative thermal diode.
    The surface of the earth is warm for the same reason a heated house is warm in the winter: Q = U * A * dT, the energy flow/heat resisting blanket of the insulated walls. The composite thermal conductivity of that paper thin atmosphere, conduction, convection, latent, LWIR, resists the flow of energy, i.e. heat, from surface to ToA and that requires a temperature differential, 213 K ToA and 288 K surface = 75 C.
    The flow through a fluid heat exchanger requires a pressure drop. A voltage differential is needed to push current through a resistor. Same for the atmospheric blanket. A blanket works by Q = U * A * dT, not S-B BB. The atmosphere is just a basic HVAC system boundary analysis.
    Open for rebuttal. If you can explain how this upwelling/downwelling/”back” radiation actually works be certain to copy Jennifer Marohasy as she has posted a challenge for such an explanation.


Leave a comment

You must be logged in to post a comment.