- Did you know that there’s no such thing as a greenhouse gas?
I then proceed to explain that the word “greenhouse” in that term is a misnomer. In a real-world earthbound greenhouse -- we all know what they look like even though there aren’t many in existence anymore -- the sun’s short-wave infrared light penetrates through the glass roof, warming up what’s inside the greenhouse: air, plants, soil, etc.
As the things inside the greenhouse absorb the short-wave infrared, they convert it into heat -- long-wave infrared. This long-wave infrared, instead of readily penetrating glass on the way out, is partially blocked; greenhouse glass is said to be opaque to long-wave infrared. Inside heat can escape from a greenhouse more readily if the temperature between inside and outside air increases. However, the mechanism -- convection -- by which the greenhouse cools under such circumstances is altogether different from what the sun does to heat up the greenhouse.
And, of course, if that bratty neighbor kid pitches a rock at the greenhouse roof and breaks a glass pane, warm air escapes, by air convection, in a hurry. In other words, a real greenhouse does its job primarily by suppressing convection.
Not so with the so-called “greenhouse” gasses, among them water vapor, methane (CH4) and, most controversially, carbon dioxide (CO2). In this case, long-wave infrared radiation radiating back from earth is absorbed by these gasses; some of it is then radiated out into space, and some is radiated back to earth, creating more warmth here. There is no phenomenon quite like this that we experience in everyday human life, which is probably why we don’t have an apt word for it in common discourse. Maybe someday somebody smarter than I am will come up with such a word, one that really fits. Until then I’ll keep using the term “greenhouse” gas but not without the irony quotes; take those quotes to mean “not really.”
Hey, I admit it: Question #1 is something of a semantic teaser. But now it’s time for Favorite Global Warmism Question #2, and this one is really serious:
- How much actual CO2 is there in the atmosphere?
At this point, I’m going to depart from the fantasy conversation in order to play some games with that number. The IPCC, along with the rest of the global-warming “consensus,” would just as soon nobody even be aware of that IPCC number; notice how global warmists never refer to it in their advocacy propaganda. However, if somebody has to know, best that the data be presented in the format of their choice. They wouldn’t like one bit what I’m about to do with it.
First, let’s take a look at IPCC presentation of present-day CO2 (actual data from 2005) compared with the beginning of the Industrial Revolution (1750):
- CO2 2005=379ppm
- CO2 1750=280ppm
- Increase: 99ppm
To get closer to human experience, we need to play with the IPCC data format by presenting the numbers like this:
- CO2 2005=379ppm=0.000379=ca 4/100,000
- CO2 1750=280ppm=0.000280=ca 3/100,000
- Increase: 99ppm=0.000099=ca 1/100,000
OK, I’ve calmed down. Now I’ll try to speak rationally.
New scientific inquiries often as not entail a form of logic known as abduction, or abductive reasoning. Another name for this is “inference to the best explanation.” Another way of putting it might be“make your best guess with the data you’ve got.” Inquiries that rely on historical data often begin and end at the level of abduction if there’s no possibility of acquiring new evidence.
Abduction can also sometimes act as a hypothesis gateway, giving cause for acceptance, even if only provisional, of a hypothesis… or dismissal of a hypothesis as prima facie implausible. Global warmism manifestly deserves the second response. The poison pill is the sheer paucity of CO2 in the atmosphere. Just in case you’re still not convinced of the magnitude of that paucity, consider this image:
This much we -- skeptics and advocates of global warmism alike -- agree on: CO2 is a “greenhouse” gas (the simplest high school science project can demonstrate that); atmospheric CO2 has increased during the industrial era due to human activity; this has added more heat energy to earth’s atmosphere and surface than previously. However, this is not enough to break through the paucity-implausibility gateway. To accept the global warmist hypothesis that anthropogenic global warming is leading to climate catastrophe, we need to know not just that industrial-era anthropogenic CO2 emissions are merely effectual; this variable must be shown to be determinative.
This means that anthropogenic CO2 emissions must be examined in full context with numerous other climate variables such as solar activity, volcanism, magnetic field shifts, etc. An inquiry like this is certain to be dauntingly, perhaps overwhelmingly, complex if conducted like authentic, inductive science. Global warmism advocates have shamelessly evaded this monumental evidence burden -- and the burden is entirely on them -- by resorting to garbage-in-garbage-out computer models, even outright data fraud and deceitfulness.
Global warmism remains the most colossal hoax ever perpetrated.
Paul Jacobson blogs underthe nom de plume Flyoverpen. He resides in Deepmidwest, FO.
Page Printed from: http://www.americanthinker.com/2014/06/my_two_favorite_questions_for_global_warmists.html at June 04, 2014 - 01:34:49 PM CDT