svetz
Works in theory! Practice? That's something else
That assumes the oceans hold an infinite amount of CO2, they don't. It's also only a "buffer", the warmer it gets the less percentage-wise is released. This is an extremely well-understood and repeatable science. But, if you can make those conclusions, hopefully you can forgive the reporters in the 70s from leaping to conclusions that the Earth is going to freeze or we're all going to die from climate change and Florida will be under water by 2020. |
![]() |
Heat transfer by radiation is very well understood, but let's look at a simple comparison... the moon is about the same orbital distance from the sun so Earth would be about the same without an atmosphere or ocean.... if the CO2 is the cause for warming.
Daytime temperatures near the lunar equator reach a boiling 250 degrees Fahrenheit (120° C, 400 K), while nighttime temperatures get to a chilly -208 degrees Fahrenheit (-130° C, 140 K). The Moon’s poles are even colder. ref
There are other differences of course, but hopefully it serves as an obvious example that the atmosphere and oceans play an enormous role in the surface temperature. If the atmosphere is important, then doesn't it seem reasonable that changes to that atmospheric composition are important?
It's not that it's not being considered, there are tons of theories. The media only has so much attention span and boring science isn't as newsworthy as climate hysterics or deniers. It's also far harder to search for as there's so much BS on the subject. Just because you're not being clobbered by something isn't evidence it doesn't exist.There must be some other variable that causes the earth to go back into the cooling phase besides CO2 .... doesn't seem to like it is even being considered.
You're right that change is always driven by something. Obviously, at a high level, cooling occurs when energy is leaves earth faster than its being absorbed. That could be from changes to incoming energy levels (e.g., orbital mechanics) or earth events (e.g., ash from volcanos, volcanic Anti-GHGs, albedo changes from desert formation). As the natural cycles are fairly regular it's probably a sequence of events.
It seems that way because it is easily measured and it is something we can control. Not easily.Kinda seems like we have latched onto the whole CO2 thing because that's something we can easily measure and think we can control.
Black body radiation isn't controversial, it's based on the first law of thermodynamics that energy cannot be created or destroyed. There are equations to describe the mechanism that have been proved time and time again without fail.
It's the mechanism by which GHGs reflect energy, and there really isn't any controversy (by the informed) that it is a real effect. Post #26 looks at the incoming and outgoing wavelengths and it was revisited in #50 as the composition changes at altitude. I still had questions long after writing it, but finally found the answers in a good video in #309, so I'd recommend all three.
It's not hard to model the atmosphere as an incoming energy stream of solar energy, and to calculate the outgoing energy based solely on atmospheric composition. But the climate models do a lot more than that (discussed in 53) because just as there are GHGs to consider, there are a number of "cooling" effects they have to include as well (e.g., aerosols, albedo, anti-GHGs).
So let's look at it another way. Given that CO2 has a half-life of well over 100 years and that it does reflect energy during the course of the year, then every molecule of CO2 mankind puts into the atmosphere must add to the temperature for over 100 years of extra energy to the planet.
The effects of one molecule in the vastness of the atmosphere is negligible. But we've been releasing gigatons of GHGs every year for a long time and with the extremely long half-life (some like methane even decompose into other other GHGs) it builds up.
![Figure-TS1-Total-annual-anthropogenic-GHG-emissions-GtCO-2-eq-yr-by-groups-of.png](https://www.researchgate.net/publication/290165128/figure/fig1/AS:614162493345811@1523439157995/Figure-TS1-Total-annual-anthropogenic-GHG-emissions-GtCO-2-eq-yr-by-groups-of.png)
So it's not only been building since we started, we've been increasing out burn rate until only very recently. NOAA's Hawaiian observatory recently reported 420.99 ppm of CO2. From the prior post, you probably remember CO2 topped out around 300 ppm in past cycles. We're way over what a "natural" cycle produces.
Of course it would. Radioactivity is natural too, doesn't mean it is good for you...... if we completely eliminated CO2 released by man ... the planet will still continue it's own natural cycle.
A +4°C or -4°C would have a big impact on the economy & human life. Via the fossil record, last time we were at +4° crocodiles lived above the arctic circle.
We're not the sole drivers of the climate, but it is silly to think we don't have our thumb on the scale.Some people think that no matter what humans do, we are too insignificant to affect the climate.
That sounds fake, I'm skeptical about the 2 degrees. Even if the temperature did go up, just as any one storm can't be clearly attributed to climate change I'm not sure that a lack of contrails can be either.Here's an interesting fact: For the three days after 911 when the planes were grounded, our climate warmed by 2 degrees C.
From my quickie search it looks like that image comes from a 2004 NASA release concluding that airplane travel overall increases the temperature.
Subsidizing oil companies to create the problem sounds worse to me. For example, the price difference between B100 (100% renewable) and diesel is about $0.52/g. Eliminate oil company subsidies and the price of diesel would go up to where B100 could compete. But, it would also destabilize needed supply lines before the B100 industry could be built up. By using temporary carbon taxes B100 could be subsidized so it could grow without destabilizing existing chains. Not a great solution and there are alternatives. |
Carl Sagan has said "it is pointless if the whole world is not onboard". Our only real technology to solve it is nuclear winter.
So, the Paris agrrement was a few years ago... how have countries been doing? It's in the CCPI reports. Denmark & Sweden are the exemplers leading the way. China fell a bit behind in 2022, but they're still ahead of the U.S., and we're still ahead of Russia. Australia did a lot in 2022, but they're still behind Russia overall.
Has all that effort really made any difference? The measurements say that it has, that the rate of increase is slowing.
Last edited: