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Member (Idle past 1113 days) Posts: 20714 From: the other end of the sidewalk Joined: |
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Author | Topic: Climate Change Denier comes in from the cold: SCIENCE!!! | |||||||||||||||||||||||||||||||||||||||
Modulous Member Posts: 7797 From: Manchester, UK Joined: Member Rating: 8.5 |
Is carbon dioxide really warming the planet? Yes.
How much energy is absorbed by the earth from incident ultraviolet radiation that reached the earth because of ozone depletion of the last 50 years over the course of a day? Let's say 'a lot'.
The extra forcing due to so called back radiation from excess C dioxide is said to be 4 watts per square meter per sec. Compare that to 3% of 1.5% of total solar irradiance as an extra source of heat. AGW falls on its face. Wait, how did the ozone get depleted?
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Modulous Member Posts: 7797 From: Manchester, UK Joined: Member Rating: 8.5 |
By chlorofluorocarbons since WW2 Was that caused by a volcano eruption or giant undersea earthquake? I completely missed it. See I thought that CFCs, that you credit the increased warming of the earth to, were anthropogenic compunds. But then you just finished telling me that anthropogenic global warming had fallen flat on its face.
AGW falls on its face. Apparently it doesn't.
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Modulous Member Posts: 7797 From: Manchester, UK Joined: Member Rating: 8.5 |
Trap means to never let it go. No, it does not.
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Modulous Member Posts: 7797 From: Manchester, UK Joined: Member Rating: 8.5 |
what does trap mean to you? The phrase 'trap more heat' means to hold a greater quantity of heat energy at any given moment. The energy will still be able to escape, so it is not 'never let go', but there is more of it within the containment area of interest. Take a house, as an example. If I put the heater on, the heat energy in the house will go up. Heat energy will still leave through the walls, windows and roof etc. If I open a window, heat energy will escape more quickly. If I install insulation, more heat will be trapped. Heat will still escape the trap, but at a slower rate than before. Since the heater is still generating the same amount of heat energy, the overall heat energy in the house will go up.
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Modulous Member Posts: 7797 From: Manchester, UK Joined: Member Rating: 8.5 |
You are talking about restricting convection of heat with your example. Except with the window, it's actually mostly conduction.
With co2, it absorbs heat energy and then releases it. And with more carbon dioxide there is more heat energy absorbed.
What evidence do you have to suggest the temporary entrapment of heat by co2 slows the release of heat into space? That wasn't the claim I made. I simply stated that 'trapping heat' does not mean 'trapped forever'. I'm fairly sure the evidence you are asking for here has already been presented, and you have already rejected it. Is there much point in presenting it again? Here is something NASA wrote for all the good that it will do. The phenomena is called energy imbalance. Eventually all the heat the earth takes in, will radiate out, but it can, for periods of time, take in more heat that it radiates back out:
quote:
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Modulous Member Posts: 7797 From: Manchester, UK Joined: Member Rating: 8.5 |
I'm saying the word trapped is misleading because it suggests co2 holds onto the heat long enough to cause an imbalance and increase the temperature of the earth. Well that's not what you said, you said
quote: But that's not the case. Heat is transferred to nitrogen and oxygen via conduction from co2 molecules and from the surface of the earth itself. Heat is truly trapped by these molecules for a very long time before convection raises the warmer air to higher elevations where the air becomes colder and drops again. There are other heat transfers taking place too. You mention 'from the surface', but also 'to the surface', for instance - including notably the ocean and to a degree, the ice. You also neglect the fact that N2 and O2 don't absorb infrared photons, while CO2 and CH4 does.
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Modulous Member Posts: 7797 From: Manchester, UK Joined: Member Rating: 8.5 |
I know n2 and o2 don't absorb infrared. Good.
But they certainly absorb through conduction and there are vastly more of them than co2 Yes they do. But where are they absorbing it from? A number of sources, but CO2 is one of them - as are other greenhouse gasses. Where is CO2 getting it from? From absorbing it from the IR radiating from the earth's surface. This will result in higher atmospheric temperatures as that o2 will also conduct heat to things such as the ground and people etc. Without the greenhouse gasses, the IR will not be absorbed by them and less heat will be absorbed by the O2 and N2, and the O2 and N2 won't be able to conduct that heat back into people...or oceans.
therefore it's disingenuous to say co2 traps heat when trying to make a case for AGW because n2 and o2 hold onto heat for a much longer time. No it's reasonable to say adding more CO2 to the atmosphere will trap more heat, as that is precisely what happens. The fact this heat gets transferred to other atmospheric molecules doesn't alter the fact that it was CO2 that captured it in the first place.
As for heat transfer to the ocean and ice, that also occurs through conduction. Exactly. So more heat being stored in O2 and N2 and other atmospheric gasses increases the conduction to the ocean and ice from the atmosphere.
But since the ocean holds vastly more heat than the atmosphere, the net transfer of heat is from ocean to ice and the atmosphere. Do you have evidence that the oceans are cooling now? This is strange because 10 weeks ago (almost to the minute, see Message 311) you said:
quote: If the oceans are warming, yet are giving up more energy to the ice and atmosphere, where is all the extra energy coming from? '3% extra ultraviolet B radiation?' caused by CFCs - Can you show your working? And if the net conduction is away from the oceans, might it be a problem if this net conduction amount decreases? Edited by Modulous, : No reason given. Edited by Modulous, : No reason given. Edited by Modulous, : No reason given.
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Modulous Member Posts: 7797 From: Manchester, UK Joined: Member Rating: 8.5
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All the gases are heated up by either thermalization from co2 or from contact with the warm ground. How does that make your case for co2 being the cause of a warmer atmosphere than would be without it? I'm willing to concede that if our atmosphere consisted solely of the carbon molecules currently present and none of the other gasses, it'd be frickin cold here. But we are talking about the atmosphere we do have. In that atmosphere, adding carbon dioxide captures more of the infrared radiation emanating from the earth's surface. These carbon molecules then transfer that heat to other things, such as the rest of the atmosphere, the ocean back to the surface etc. More heat, leads to higher temperatures. Conversely, less carbon molecules capture less radiation, meaning more of this heat escapes without heating the atmosphere. Less heat being trapped in the atmosphere leads to lower temperatures.
Another point is that climate change is a controversial topic and so sources for both sides of an issue can be equally credible. They can be, but that doesn't mean they are. It's actually not a controversial topic - the only real controversy is how we respond to it. The Roswell incident is a controversial topic, by some measure. The story that a modified weather balloon holding a microphone as an experimental nuclear bomb detonation detector was covered up by the military as a national security secret is more credible than the military covering up interstellar aliens.
Very little is accepted in climate science publications that does ot support the notion that co2 is the cause of global warming Two possibilities:1) Systemic bias 2) Contrary views are not supported How much is accepted in medical journals that heart attacks are not deleterious to health?
No pro AGW article I have ever seen even attempts to address any of the issues Dan brings up. Solar activity and water vapour are very much discussed in climate change science. Here is a paper A Decade of the Moderate Resolution Imaging Spectroradiometer: Is a Solar—Cloud Link Detectable? for example:
quote: Or Solar Influence on Global and Regional Climates:
quote: Cosmic rays, solar activity and the climate:
quote: Investigation of cosmic ray-cloud connections using MISR:
quote: quote:
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Modulous Member Posts: 7797 From: Manchester, UK Joined: Member Rating: 8.5 |
A short term change in cosmic ray flux is unlikely to show up in total global albedo. The effect of cosmic rays is most likely to be long term and it's most intense effect would be in the intertropical convergence zone. An enormous amount of heat is lost to space in this zone through thunderstorms and hurricanes and cyclones. The sun also shines more directly in this zone than the other latitudes. Words. I'll repeat the science:
quote: I don't know what counts as 'long term', but the study you quoted goes back to the turn of the twentieth century.
quote: quote: I still contend that your claim that
No pro AGW article I have ever seen even attempts to address any of the issues Dan brings up. remains false. Edited by Modulous, : No reason given.
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