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climate change

2

Comments

  • Moderators, Society & Culture Moderators Posts: 12,821 Mod ✭✭✭✭riffmongous


    fits wrote: »
    Its around 12% now, which is not an insignificant amount imo. Percentage forest cover of EU-27 area is 38%

    The situation in Ireland is at least getting better, but I wonder what percentage of that is native broadleaf species? And how much is those awful planted conifer woods


  • Registered Users, Registered Users 2 Posts: 13,104 ✭✭✭✭djpbarry


    Lbeard wrote: »
    And how would this have any effect on particle momentum? - which is temperature.
    Particle momentum is temperature? What?
    Lbeard wrote: »
    All gases in the atmosphere are green house gases. ALL OF THEM.
    They most certainly are not.

    You know, you might want to at least get the fundamentals right yourself before you go chastising others for their lack of understanding.
    Lbeard wrote: »
    I'm saying Arhenius' work was wrong.
    But you're not going to specify why it's wrong? Or even what you mean by "wrong"?


  • Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 92,789 Mod ✭✭✭✭Capt'n Midnight


    djpbarry wrote: »
    You know, you might want to at least get the fundamentals right yourself before you go chastising others for their lack of understanding.
    +1


  • Banned (with Prison Access) Posts: 311 ✭✭Lbeard


    djpbarry wrote: »
    Particle momentum is temperature? What?
    They most certainly are not.

    If you do not know the relationship between particle momentum and temperature you do not know your arse from your elbow.

    Temperature is a measure of particle momentum. And that is it. If you do not know this, you really know nothing.

    You know, you might want to at least get the fundamentals right yourself before you go chastising others for their lack of understanding.

    Honestly, you're giving me a headache.
    But you're not going to specify why it's wrong? Or even what you mean by "wrong"?

    What's the point in explaining it to you? You don't even understand the most basic physics. As someone once said, the essence of good science communication is being able to explain any concept to a 7 year-old child.....But what if the child is not really all that bright?


  • Registered Users, Registered Users 2 Posts: 13,104 ✭✭✭✭djpbarry


    Lbeard wrote: »
    Temperature is a measure of particle momentum.
    I think you mean kinetic energy.
    Lbeard wrote: »
    What's the point in explaining it to you?
    It might actually give your argument some substance.


  • Banned (with Prison Access) Posts: 311 ✭✭Lbeard


    djpbarry wrote: »
    I think you mean kinetic energy.

    [latex] Momentum= Mass*Velocity= mv[/latex]

    And

    [latex] KineticEnergy=\frac{1}{2}mv^{2} [/latex]

    And

    06143f42ed0a761f114bd8b04dccbf67.png

    Where T is the temperature, and Kb the Boltzmann constant. In other words, temperature is kinetic energy, and kinetic energy is the total momentum.

    Temperature is a measure of particle momentum.

    Unless you have some fairyland theory, this one is game, set, and match.
    It might actually give your argument some substance.

    Dj, dj, dj, ......dj

    Dj....you're giving me a splitting headache.....Can't you play outside with the other children.


  • Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 92,789 Mod ✭✭✭✭Capt'n Midnight


    Lbeard wrote: »
    If you do not know the relationship between particle momentum and temperature you do not know your arse from your elbow.

    Temperature is a measure of particle momentum. And that is it. If you do not know this, you really know nothing.




    Honestly, you're giving me a headache.



    What's the point in explaining it to you? You don't even understand the most basic physics. As someone once said, the essence of good science communication is being able to explain any concept to a 7 year-old child.....But what if the child is not really all that bright?
    MOD

    This has gone on long enough. You've used up all the goodwill.

    The rule is to attack the post and not the poster.

    Read the charter.


  • Registered Users, Registered Users 2 Posts: 13,673 ✭✭✭✭fits


    Lbeard wrote: »
    [latex] Momentum= Mass*Velocity= mv[/latex]

    And

    [latex] KineticEnergy=\frac{1}{2}mv^{2} [/latex]

    And

    06143f42ed0a761f114bd8b04dccbf67.png

    Where T is the temperature, and Kb the Boltzmann constant. In other words, temperature is kinetic energy, and kinetic energy is the total momentum.

    Temperature is a measure of particle momentum.

    Unless you have some fairyland theory, this one is game, set, and match.



    Dj, dj, dj, ......dj

    Dj....you're giving me a splitting headache.....Can't you play outside with the other children.

    I for one am completely sold on casey212 lbeard's argument.

    Question everything, except his assertions even if they are completely unexplained. Don't worry, you wouldn't understand them anyway.


  • Registered Users, Registered Users 2 Posts: 13,104 ✭✭✭✭djpbarry


    Lbeard wrote: »
    [latex] Momentum= Mass*Velocity= mv[/latex]

    And

    [latex] KineticEnergy=\frac{1}{2}mv^{2} [/latex]

    And

    06143f42ed0a761f114bd8b04dccbf67.png

    Where T is the temperature, and Kb the Boltzmann constant. In other words, temperature is kinetic energy, and kinetic energy is the total momentum.
    You seem to have stopped short of showing that [latex]T=mv[/latex].


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  • Banned (with Prison Access) Posts: 311 ✭✭Lbeard


    djpbarry wrote: »
    You seem to have stopped short of showing that [latex]T=mv[/latex].

    Dj, will you stop.

    I never said [latex]T=mv[/latex] anywhere. You're trying to save face by claiming I said things I have not. You're misrepresenting me.

    It's impossible to have a discussion on this subject. People get too emotional. And it gets silly.


  • Registered Users, Registered Users 2 Posts: 13,104 ✭✭✭✭djpbarry


    Lbeard wrote: »
    I never said [latex]T=mv[/latex] anywhere.
    You said that particle momentum is temperature, didn't you?


  • Banned (with Prison Access) Posts: 311 ✭✭Lbeard


    djpbarry wrote: »
    You said that particle momentum is temperature, didn't you?

    Yes I did. Because the statement is 100% correct. You're the one with the wonky formula.

    Trust me Dj.


  • Registered Users, Registered Users 2 Posts: 13,104 ✭✭✭✭djpbarry


    Lbeard wrote: »
    Yes I did. Because the statement is 100% correct.
    It clearly isn't.

    Seems to me someone's being a bit fluffy and hand-wavy here.


  • Registered Users, Registered Users 2 Posts: 147 ✭✭citrus burst


    Lbeard wrote: »
    If you do not know the relationship between particle momentum and temperature you do not know your arse from your elbow.

    Temperature is a measure of particle momentum. And that is it. If you do not know this, you really know nothing.

    Temperature is a measure of the degree of randomness in its most fundamental sense. Solids are cold ie not random, gases are hot ie random, liquids are in between (not strictly true). It is a bulk phenomenon, to speak of the temperature of a single atom or molecule or electron doesn't really make sense.

    Things like the rotation, vibration and velocity of a molecule will increase the overall temperature of something.

    Also, if we were to go by your idea of temperature, solids wouldn't have a temperature.


  • Banned (with Prison Access) Posts: 311 ✭✭Lbeard


    Temperature is a measure of the degree of randomness in its most fundamental sense.

    The randomness of what? The randomness of randomness?
    Solids are cold ie not random, gases are hot ie random, liquids are in between (not strictly true).

    I'm scratching my head.
    It is a bulk phenomenon, to speak of the temperature of a single atom or molecule or electron doesn't really make sense.

    You mean it doesn't really make sense to you.

    Things like the rotation, vibration and velocity of a molecule will increase the overall temperature of something.

    I'm not going to say you're right or wrong. You seem to think temperature is "randomness"........But the randomness of what? Is a shuffled deck of cards hotter than an ordered one?
    Also, if we were to go by your idea of temperature, solids wouldn't have a temperature.

    Listen. You do not know or understand my idea of temperature, which is the scientific understanding of temperature. I'm not sure you even know what your idea of temperature is.

    And don't get huffy with me because you don't understand what you're talking about.


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  • Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 92,789 Mod ✭✭✭✭Capt'n Midnight


    Lbeard wrote: »
    And don't get huffy with me because you don't understand what you're talking about.
    MOD

    You got that one for being huffy.

    /MOD

    Todays word is entropy.


  • Registered Users, Registered Users 2 Posts: 13,104 ✭✭✭✭djpbarry


    Lbeard wrote: »
    The randomness of what? The randomness of randomness?

    I'm scratching my head.

    You mean it doesn't really make sense to you.

    I'm not going to say you're right or wrong. You seem to think temperature is "randomness"........But the randomness of what? Is a shuffled deck of cards hotter than an ordered one?

    Listen. You do not know or understand my idea of temperature, which is the scientific understanding of temperature. I'm not sure you even know what your idea of temperature is.

    And don't get huffy with me because you don't understand what you're talking about.
    Still waiting for you to point to the flaws in Arhenius' work.


  • Registered Users, Registered Users 2 Posts: 147 ✭✭citrus burst


    Lbeard wrote: »
    The randomness of what? The randomness of randomness?

    The randomness of a material, I guess disorder is a better word. The overall disorder of a material increases as you increase the temperature.

    In general, solids are really ordered materials, with well defined points. As you increase the temperature, the order decreases, and the location of each atom becomes less well defined, mainly through vibrations. Eventually the temperature increases so much that the atoms loss all around and are allowed move essentially freely through the material, we call this the melting point.

    Increase the temperature more and you loss more order and eventually you get a gas.
    Lbeard wrote: »
    You mean it doesn't really make sense to you.
    The kinetic theory of gases? Makes sense to me. Its a classical model to deal with the interactions of billard balls, that only takes into account the average translational velocity. As such its not really a sufficient model to explain atmospheric conditions which are dominated by rotations (microwave) and vibrations (infrared) of molecules

    What doesn't make sense is the temperature of one atom.
    Lbeard wrote: »
    I'm not going to say you're right or wrong. You seem to think temperature is "randomness"........But the randomness of what? Is a shuffled deck of cards hotter than an ordered one?

    A shuffled deck is just as random as a none shuffled deck. A better analogy would be a deck in its box (solid), the cards able to move freely around a on a table (liquid) or the cards flying freely through the room (gas)
    Lbeard wrote: »
    Listen. You do not know or understand my idea of temperature, which is the scientific understanding of temperature. I'm not sure you even know what your idea of temperature is.

    To be perfectly honest with you I don't really understand temperature, not many people do. I do however understand the kinetic theory of gases. That you think you understand what temperature is, leads me to believe that you don't know what temperature is.


  • Banned (with Prison Access) Posts: 311 ✭✭Lbeard


    djpbarry wrote: »
    Still waiting for you to point to the flaws in Arhenius' work.


    No, Dj. I've already been warned for upsetting people. If you want to see what's wrong with Arhenius' work look it up yourself.


  • Registered Users, Registered Users 2 Posts: 13,104 ✭✭✭✭djpbarry


    Lbeard wrote: »
    No, Dj. I've already been warned for upsetting people. If you want to see what's wrong with Arhenius' work look it up yourself.
    I'm going to take that as a tacit admission that you don't understand his work sufficiently to critique it.


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  • Banned (with Prison Access) Posts: 311 ✭✭Lbeard


    The kinetic theory of gases? Makes sense to me. Its a classical model to deal with the interactions of billard balls, that only takes into account the average translational velocity. As such its not really a sufficient model to explain atmospheric conditions which are dominated by rotations (microwave) and vibrations (infrared) of molecules

    No. The classical theory will account for all energy in a gas. Rotational, vibrational, whatever you like. If you hold a mercury thermometer in the air (just to avoid getting nit picking - at night when there is no wind) it will sample the momentum of the particles and it will give you an accurate average of the energy in the air. There isn't anyway for the energy to hide from the thermometer.
    What doesn't make sense is the temperature of one atom.

    The kinetic energy of a single atom can be referred to as its' temperature. In the thermo-sphere, where you have fast atoms whizzing around but not many of them, they're considered to be hot. When you measure temperature of say container of gas, the thermometer all though it doesn't look like it's adding up, and then dividing, it is calculating the average momentum of each atom.
    A shuffled deck is just as random as a none shuffled deck. A better analogy would be a deck in its box (solid), the cards able to move freely around a on a table (liquid) or the cards flying freely through the room (gas)

    But something has to make the cards move - they can't move by themselves.
    To be perfectly honest with you I don't really understand temperature, not many people do. I do however understand the kinetic theory of gases. That you think you understand what temperature is, leads me to believe that you don't know what temperature is.

    Listen I've been warned about upsetting people. But you're making it very hard for me not to upset you. You're saying you don't know much about temperature, and for that reason, you assume you know more about it than I do.

    Temperature is one thing that is very well understood in science. There is no hidden magic in it. It's very well understood how solids turn to liquids, how liquids turn to gases and back again. For temperature, kinetic theory suffices - photons can be considered to be particles with momentum. The quantum aspect is something that can be largely ignored, there are specific cases where it is important but *cough - this bit is not intended for you Citrus, you wouldn't understand it either - cough* but it is also important to understand the quantum aspect lest you misunderstand a measurement and think energy has gone somewhere it hasn't. Svante Arehenius didn't have the benefit of quantum theory.


  • Registered Users, Registered Users 2 Posts: 13,673 ✭✭✭✭fits


    djpbarry wrote: »
    I'm going to take that as a tacit admission that you don't understand his work sufficiently to critique it.

    no proper scientist would be upset by a reasonable and logical discussion. Good scientific thought involves making up ones mind based on quality evidence and argument and not the reverse (looking for arguments that back up what one has already decided).


  • Registered Users, Registered Users 2 Posts: 13,104 ✭✭✭✭djpbarry


    Lbeard wrote: »
    No. The classical theory will account for all energy in a gas. Rotational, vibrational, whatever you like. If you hold a mercury thermometer in the air (just to avoid getting nit picking - at night when there is no wind) it will sample the momentum of the particles and it will give you an accurate average of the energy in the air. There isn't anyway for the energy to hide from the thermometer.
    Eh, latent heat?


  • Banned (with Prison Access) Posts: 311 ✭✭Lbeard


    djpbarry wrote: »
    Eh, latent heat?

    Yes, Dj.....latent heat.......What about it?

    Don't think it's one of the last great unsolved puzzles of science, because it isn't.

    Think, DJ, what is latent heat?...........That's not a question I want the answer to, as I know the answer......It's a rhetorical question. ......I'm not being a smart arse. It would be worth your while to think these things over. The whole thing joins up really neatly.

    We know where the heat goes for everything. We know precisely what is happening, as far as heat goes. We know precisely how water can turn to ice, or water can turn to vapour, and form clouds. We know why you feel cold when water is evaporating off your skin. We know how you get sunburn, frostbite, and we know how a greenhouse works. At least the royal "we", which is me.

    There are many reasons misunderstandings occur over heat and light. Like people thinking red light is warmer than white light, because the light heater in a pub beer garden is red......That's not the reason........The reason is if you put the same power through a light emitting white light, everyone would get just as hot, but they would be blinded by the intensity of the light.

    There are also other bits of physics people who should know better, get arseways and repeat, with no one blinking. I'm not going to get started as we'll be going around the houses again, but you'd be surprised.


  • Registered Users, Registered Users 2 Posts: 13,673 ✭✭✭✭fits


    Lbeard wrote: »
    Yes, Dj.....latent heat.......What about it?

    Don't think it's one of the last great unsolved puzzles of science, because it isn't.

    heater in a pub beer garden is red......That's not the reason........The reason is if you put the same power through a light emitting white light, everyone would get just as hot, but they would be blinded by the intensity of the light.

    .
    ::D
    What about infra red lamps then?


  • Registered Users, Registered Users 2 Posts: 13,104 ✭✭✭✭djpbarry


    Lbeard wrote: »
    Yes, Dj.....latent heat.......What about it?
    It's not going to register on a thermometer, is it?
    Lbeard wrote: »
    We know how you get sunburn, frostbite, and we know how a greenhouse works. At least the royal "we", which is me.
    A few short posts ago, you demonstrated that you didn't even know what a greenhouse gas is.


  • Banned (with Prison Access) Posts: 311 ✭✭Lbeard


    fits wrote: »
    ::D
    What about infra red lamps then?

    I've been warned about being mean and rude.......So I won't be.

    But I would like to thank you for proving my point.


  • Banned (with Prison Access) Posts: 311 ✭✭Lbeard


    djpbarry wrote: »
    It's not going to register on a thermometer, is it?

    Ah DJ me auld flower. You're taking me around be the houses now.

    A few short posts ago, you demonstrated that you didn't even know what a greenhouse gas is.

    No Dj, you demonstrated you did not know what you were talking about. Another popular misconception and misunderstanding in science is mistaking "greenhouse gases" as being distinct from other atmospheric gases. This is not true. All atmospheric gases are "greenhouse gases". I'm not sure who started the "greenhouse gases" nonsense. Someone who didn't understand the Greenhouse effect. It's nearly as silly as thinking there's a difference between an organic potato, and one that isn't (whatever that would mean).

    Maybe there's a semi-legitimate excuse for using the term with the public - the public being differently intelligent. But when a "scientist" uses the term "greenhouse gases" in a scientific paper....In my opinion it's not excusable.


  • Registered Users, Registered Users 2 Posts: 13,104 ✭✭✭✭djpbarry


    Lbeard wrote: »
    All atmospheric gases are "greenhouse gases".
    No, they’re not. Nitrogen and oxygen, for example, absorb virtually no infra-red radiation and are therefore not considered greenhouse gases.
    Lbeard wrote: »
    I'm not sure who started the "greenhouse gases" nonsense. Someone who didn't understand the Greenhouse effect. It's nearly as silly as thinking there's a difference between an organic potato, and one that isn't (whatever that would mean).
    Not as silly as thinking that different atmospheric gases don’t have different physical properties.
    Lbeard wrote: »
    Maybe there's a semi-legitimate excuse for using the term with the public - the public being differently intelligent. But when a "scientist" uses the term "greenhouse gases" in a scientific paper....In my opinion it's not excusable.
    Well, a quick search turns up over 3,700 research articles on the Nature website mentioning the term “greenhouse gas” – you best get on to them and set them straight.


  • Banned (with Prison Access) Posts: 311 ✭✭Lbeard


    djpbarry wrote: »
    No, they’re not. Nitrogen and oxygen, for example, absorb virtually no infra-red radiation and are therefore not considered greenhouse gases.

    DJ, I'm not getting into how you have piled misconception on top of misconception. Did you believe red pub heaters (or let's call them "infra red" beer garden heaters) had used "infra red" because it's magically warmer than white light. I've heard the pub heater misconception mixed up with climate change arguments before.

    And of course you are wrong. Someone creates the term "greenhouse gases" and others, or the same person, retroactively justifies it. This leads to further misconceptions - the extreme being fluffy headed flower children believing all green house gases are man made. Or even that natural CO2 is fine (because it's organic and natural - like organic and natural yogurt) and man made CO2 is nasty because it's unnatural.

    Idiots like Gwyneth Paltrow making claims that supermarket soap is bad because it's full of chemicals. She only uses organic soap that doesn't have any chemicals in it. And anyone who attacks her over it is being mean :( because she's nice. And she is nice because she is stupid, because stupid people are nice because they never make you feel stupid.

    Man made CO2 is nasty - it's full of chemicals.
    Not as silly as thinking that different atmospheric gases don’t have different physical properties.

    I never said anything of the sort.
    Well, a quick search turns up over 3,700 research articles on the Nature website mentioning the term “greenhouse gas” – you best get on to them and set them straight.

    So what. I mean really, so what. There could be millions, it still doesn't make a difference. I've seen scientific papers that cite a UN report on climate change as a scientific basis for ludicrous claims. And when you read the UN report, you realise it hasn't been written by a scientist - it's some natural yogurt eating krank - no citations to show where their extraordinary assumptions are coming from - simply pulled out of their bottoms.

    A well known climate campaigner had a new book out a while back. And it was so bad, I wanted to vomit reading it. It was just rubbish nonsensical claim after nonsensical claim. But it's this halo effect - this guy cares about nature he must be a good guy, everything he says must be true, that people don't really question what these guys are at. Their assertions are often completely from their imaginations. I would be shocked - but not overly surprised if these books did find their way into paper citations.

    I do know where some of the other climate change misconceptions came from. Kranks making silly assumptions, and disregarding the laws of physics. The other whatevers blindly citing the krank science - citations on a paper look so sciencey don't they.


    DJ, there's no way I could convince you either way. The creationists even have their own science books and science museums these days. There's no talking to them.


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  • Registered Users, Registered Users 2 Posts: 13,104 ✭✭✭✭djpbarry


    Lbeard wrote: »
    I never said anything of the sort.
    So explain to us why nitrogen and oxygen can be considered greenhouse gases.


  • Banned (with Prison Access) Posts: 311 ✭✭Lbeard


    djpbarry wrote: »
    So explain to us why nitrogen and oxygen can be considered greenhouse gases.

    Because they are atmospheric gases.

    And if you don't understand what I mean, you simply do not understand how the Greenhouse Effect works. Simple as that.

    I'm not getting any further into this. People who make the distinction - don't realise, that usually in the same breath they are contradicting themselves. Without even batting an eyelid.

    These "climate discussions" always disintegrate into rubbish. But they're interesting in seeing how people perceive science - or even how they perceive reality. If on an emotional level it feels true, then it must be true. An organic potato is better than an ordinary potato, because they want it to be....It fits in with their silly ideas of what is natural, thus good, and what is unnatural, thus bad.

    Whether they believe reality is driven by their feelings I don't know. They probably do. People do shoot the messenger - believing it can make the bad news go away. Or like a person because they say something they want to hear.


  • Registered Users, Registered Users 2 Posts: 13,104 ✭✭✭✭djpbarry


    Lbeard wrote: »
    Because they are atmospheric gases.
    That's not an explanation. Just because a gas is in the atmosphere, it does not mean it contributes to the greenhouse effect.
    Lbeard wrote: »
    And if you don't understand what I mean, you simply do not understand how the Greenhouse Effect works.
    If anyone on this thread has demonstrated a lack of understanding, it is most definitely you.

    Tell you what, why don't you do us all a favour and explain the greenhouse effect to us. I'm particularly interested to hear about the contributions of nitrogen and oxygen.
    Lbeard wrote: »
    These "climate discussions" always disintegrate into rubbish. But they're interesting in seeing how people perceive science - or even how they perceive reality. If on an emotional level it feels true, then it must be true.
    Oh, the irony.


  • Banned (with Prison Access) Posts: 311 ✭✭Lbeard


    djpbarry wrote: »
    That's not an explanation. Just because a gas is in the atmosphere, it does not mean it contributes to the greenhouse effect.

    Oh yes it does.
    If anyone on this thread has demonstrated a lack of understanding, it is most definitely you.

    Know I have demonstrated a lack of people skills. If I had people skills I would agree with you, just to make you happy. I get in trouble all the time for disagreeing with people, and then they get upset when they realise they're wrong. This makes them angry - but they're not angry at themselves for not knowing what they were on about - they're angry at me for making them feel bad about themselves. Instead of kicking themselves in the ass - they find some way to kick me. Usually, it'll be through back biting, or making up stories about me, or just suckily saying I'm not a nice guy :(. I'm probably not a nice guy. so maybe they have a point.

    If you want to get on in life. Just agree with everyone - make them feel good about themselves.
    Tell you what, why don't you do us all a favour and explain the greenhouse effect to us.

    Gravity traps the atmospheric gases around the earth. The sun heats up the gases. And that is the Green House effect.
    I'm particularly interested to hear about the contributions of nitrogen and oxygen.

    Because they're atmospheric gases.


  • Registered Users, Registered Users 2 Posts: 13,104 ✭✭✭✭djpbarry


    Lbeard wrote: »
    Gravity traps the atmospheric gases around the earth. The sun heats up the gases. And that is the Green House effect.
    Interesting theory. So, presumably, you're going to tell us that an actual greenhouse works in the same way?


  • Banned (with Prison Access) Posts: 311 ✭✭Lbeard


    djpbarry wrote: »
    Interesting theory.

    Yes...That is the theory. It is uncontroversial and consistent. The misunderstandings of the Green House effect are not.
    So, presumably, you're going to tell us that an actual greenhouse works in the same way?
    Presumably, Dj, you're trying to drive me up the wall. I explained in one single sentence how it works. And you're trying to ridicule me for things I've never said or suggested.

    Okay, for everyone's benefit, not just DJ, because I'll probably never get through to him. Why it is so berkishly stupid, if you should know better, and you don't, you should kick yourself in the arse, and not my arse for breaking the bad news, if you thought "greenhouse" gases were distinct from other atmospheric gases.

    Watch. I meant what I said when the clowns who make the distinction contradict themselves in the same breath.

    Typically, they'll say something like "Greenhouse gases are causing a rise in average temperatures....blah blah....we're all going to die". There are variations on the theme, but I am speaking of those who specifically make a distinction between "Greenhouse" gases and other atmospheric gases.

    If "Greenhouse" gases are causing a rise in temperature, then what is this temperature of? it's the temperature of the atmosphere. And what is the atmosphere made of? It's made of atmospheric gases.........Because every atmospheric gas is a "greenhouse" gas. This distinction is essentially deeply misleading and moronic. It's a basic error - but when they continue to try and justify the distinction they pile misconception on top of misconception. But the basic error is such a glaring misconception, it is a puzzle why they get away with saying it.

    Something happens when these people speak, that people who really should know better suspend their critical thinking skills. They often give the 911 truthers a run for their money on loopiness - but people just credulously lap it up. Many statements they make are pure Gwyneth Paltrow.


  • Registered Users, Registered Users 2 Posts: 13,104 ✭✭✭✭djpbarry


    Lbeard wrote: »
    Presumably, Dj, you're trying to drive me up the wall. I explained in one single sentence how it works. And you're trying to ridicule me for things I've never said or suggested.
    No, I made a simple analogy. If the greenhouse effect is what you say it is, then why do people bother with greenhouses?


  • Banned (with Prison Access) Posts: 311 ✭✭Lbeard


    djpbarry wrote: »
    No, I made a simple analogy.

    Simple indeed. I only wish whoever had the idea of dumbing down the concept hadn't dumbed it down so much as they have.... to the point it's become as dumb as it has.
    If the greenhouse effect is what you say it is, then why do people bother with greenhouses?

    Because it traps heat in a localised space - that of a greenhouse. So, the "gas" (the air) doesn't reach thermal equilibrium with the "gas" outside the greenhouse (the air in your back garden).

    DJ, what you're saying, is honestly, like saying "well, why do people have glass in their windows and double glazing?". If you didn't have glass windows in your house DJ, then the inside of your house would be at thermal equilibrium with your back garden. It would be cold as your back garden......You know DJ, it gets cold outside, and you shut your windows.......Have you ever thought why you do that?

    DJ, you're making me look like a bully.


  • Registered Users, Registered Users 2 Posts: 147 ✭✭citrus burst


    Lbeard wrote: »
    No. The classical theory will account for all energy in a gas. Rotational, vibrational
    No it won't, it only takes into account three degrees of freedom x,y,z as it treats particles as billard balls. It does not take into account vibrational or rotational degrees of freedom. CO2 for example has at least 3 additional degrees of freedom, 2 vibrational and 1 rotational.
    Lbeard wrote: »
    The kinetic energy of a single atom can be referred to as its' temperature. In the thermo-sphere, where you have fast atoms whizzing around but not many of them, they're considered to be hot. When you measure temperature of say container of gas, the thermometer all though it doesn't look like it's adding up, and then dividing, it is calculating the average momentum of each atom.
    The kinetic energy of a single atom is just that, it is not its temperature. If this was the case, the temperature would vary significantly at any given moment. We'd have mad things going on.
    Lbeard wrote: »
    Listen I've been warned about upsetting people. But you're making it very hard for me not to upset you. You're saying you don't know much about temperature, and for that reason, you assume you know more about it than I do.
    Temperature is complex enough, I think.
    Lbeard wrote: »
    Temperature is one thing that is very well understood in science. There is no hidden magic in it. It's very well understood how solids turn to liquids, how liquids turn to gases and back again. For temperature, kinetic theory suffices - photons can be considered to be particles with momentum. The quantum aspect is something that can be largely ignored, there are specific cases where it is important but *cough - this bit is not intended for you Citrus, you wouldn't understand it either - cough* but it is also important to understand the quantum aspect lest you misunderstand a measurement and think energy has gone somewhere it hasn't. Svante Arehenius didn't have the benefit of quantum theory.
    What is temperature then?


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  • Registered Users, Registered Users 2 Posts: 147 ✭✭citrus burst


    Not all atmospheric gases are greenhouse gases. O, O2, N and N2 for example are not greenhouse gases. H20, CO2, N20 and CH4 are greenhouse gases.


  • Registered Users, Registered Users 2 Posts: 13,104 ✭✭✭✭djpbarry


    Lbeard wrote: »
    Because it traps heat in a localised space - that of a greenhouse. So, the "gas" (the air) doesn't reach thermal equilibrium with the "gas" outside the greenhouse (the air in your back garden).
    But if the air in the greenhouse and the air in the garden are both being heated directly by the sun, then why are they not in thermal equilibrium?
    Lbeard wrote: »
    DJ, what you're saying, is honestly, like saying "well, why do people have glass in their windows and double glazing?".
    Slightly different, because houses tend to have central heating, whereas a greenhouse obviously does not.


  • Banned (with Prison Access) Posts: 311 ✭✭Lbeard


    djpbarry wrote: »
    But if the air in the greenhouse and the air in the garden are both being heated directly by the sun, then why are they not in thermal equilibrium?

    Because the glass stops the particles of warm air escaping. They literally bounce back off the glass. If there was no glass they'd keep traveling, colliding with other particles and the randomness of the collisions would distribute their energy relatively evenly. Glass lets the light in, but doesn't let the air out.
    Slightly different, because houses tend to have central heating, whereas a greenhouse obviously does not.

    Okay, say if it's winter, and you have your central heating on......Would you leave your windows open, or would you close them?

    Why do people put insulation in their attics?

    Why do people wear woolly jumpers?

    Is there anything else you would like to know? Like why you can see through a pane of glass, but you can't see through a brick?


  • Registered Users, Registered Users 2 Posts: 13,104 ✭✭✭✭djpbarry


    Lbeard wrote: »
    Because the glass stops the particles of warm air escaping.
    It also stops warm air entering the greenhouse. You're claiming that the sun heats all of the atmosphere directly. So why is the atmosphere in the greenhouse heated more than the atmosphere outside the greenhouse?


  • Banned (with Prison Access) Posts: 311 ✭✭Lbeard


    djpbarry wrote: »
    But if the air in the greenhouse and the air in the garden are both being heated directly by the sun, then why are they not in thermal equilibrium?

    Because the glass stops the particles of warm air escaping. They literally bounce back off the glass. If there was no glass they'd keep traveling, colliding with other particles and the randomness of the collisions would distribute their energy relatively evenly. Glass lets the light in, but doesn't let the air out.
    Slightly different, because houses tend to have central heating, whereas a greenhouse obviously does not.

    Okay, say if it's winter, and you have your central heating on......Would you leave your windows open, or would you close them?

    Why do people put insulation in their attics?

    Why do people wear woolly jumpers?

    Is there anything else you would like to know? Like why you can see through a pane of glass, but you can't see through a brick?


  • Registered Users, Registered Users 2 Posts: 13,104 ✭✭✭✭djpbarry


    Lbeard wrote: »
    Because the glass stops the particles of warm air escaping.
    But you haven't explained why the air in the greenhouse is warmer than the air outside in the first place? If the sun is heating all of the atmosphere directly, there shouldn't be a temperature differential, should there? If I erect a greenhouse in my garden right now, initially, the air in the greenhouse will be the same temperature as the air outside. The sun doesn't then preferentially heat the air in the greenhouse, does it? So why does the greenhouse become warmer than the exterior?


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  • Banned (with Prison Access) Posts: 311 ✭✭Lbeard


    djpbarry wrote: »
    But you haven't explained why the air in the greenhouse is warmer than the air outside in the first place? If the sun is heating all of the atmosphere directly, there shouldn't be a temperature differential, should there?

    If I erect a greenhouse in my garden right now, initially, the air in the greenhouse will be the same temperature as the air outside. The sun doesn't then preferentially heat the air in the greenhouse, does it? So why does the greenhouse become warmer than the exterior?


    DJ, if you didn't have windows and a ceiling on your greenhouse, the warm air would escape, and cold air could enter and mix with the greenhouse air.

    The air outside the greenhouse is getting just as much energy as the air in the greenhouse. Just the air outside can move more - that's how you get wind, clouds, rain, weather.

    How did you think a greenhouse worked?


  • Banned (with Prison Access) Posts: 311 ✭✭Lbeard


    Citrus, before I get into a point by point response, I would like to talk a little about a psychological phenomenon known as cognitive dissonance and creationism.

    http://en.wikipedia.org/wiki/Cognitive_dissonance

    The theory of cognitive dissonance in social psychology proposes that people have a motivational drive to reduce dissonance by altering existing cognitions, adding new ones to create a consistent belief system, or alternatively by reducing the importance of any one of the dissonant elements.[1]

    It is the distressing mental state that people feel when they "find themselves doing things that don't fit with what they know, or having opinions that do not fit with other opinions they hold."[4]

    A key assumption is that people want their expectations to meet reality, creating a sense of equilibrium.[5] Likewise, another assumption is that a person will avoid situations or information sources that give rise to feelings of uneasiness, or dissonance.[1]

    Now, why do creationist continue to believe rubbish about the earth being 8 thousand years old when there is an abundance of evidence that it is not?

    Are the creationists completely stupid? No they're not. Are they mad? No. They're the best kind of people; not too clever and not too thick. "normal" people. And in America, though you might expect them to be dumb poor white trash, they're actually the suburban middle-class. Nice houses, jobs that pay very well, nice cars, good lives. They're no more stupid than Ireland's upper-middle-class, and just as "educated". No more stupid than the teachers I had at school, or the parish priest.

    When you argue with a creationist, they first respond with semi-plausible little exceptions to your explanations - they will feel quite confident. When you tear these explanations down, especially when you use examples that make perfect sense to them, they start to panic a little - that's the beginning of the dissonance - they're emotionally aware that their explanation is contradictory. Then they do the cognitive dissonance smile icon10.png.........It's not a happy smile, it's an angry teeth bared smile. They may then try to ridicule you.......They are trying to show they're relax, laughing, "your ideas are foolish". There's more than a little aggression in that smile - the eyes are ever so jumpy.

    Then they display smugness and condescension.......But the smugness isn't out of confidence, and neither is the condescension - it's the absolute opposite it's anger and panic. The ridicule is nervous laughter. They'll try defenses like "Well all my church believe in creationism, and they all have great jobs, some even teach, and are wealthier than the atheists, we are the superior people, so it must be true" Of course they don't believe this. They know their friend the teacher is as thick as a brick, and only got the job because they were someone's daughter. And the same with the rest of their congregation. They all have their jobs and wealth because they excluded everyone who wasn't like them - didn't believe in the same fairy tales etc. You're a kid and you think everyone who teaches at a university is really clever - you go there, and after a time it dawns on you they may not be - some are really stupid. Often got their jobs because of their social class and family connections.

    Then their defense of creationism becomes completely absurd. This is effectively like a psychotic episode for a schizophrenic. The dissonance is so much reality starts to melt. They say things about that sound absolutely stupid.

    But they're not being stupid. They're having an episode - an episode of cognitive dissonance. They're not crazy either, the craziness will wear off. But for the moment they're complete irrational. They'll say absurd things about the function of greenhouses, that make them sound they don't even understand how a pane of glass works.

    They'll keep clutching at straws. "Well how do we have chickens if the first chicken wasn't around to lay the first egg?....explain that to me?"

    They become giddy. Alternating between snarls and fake smiles - they're hopping on the verge of violence. They'll decide you are being evil..........That's right, he's evil.............Because good people believe in creationism, and bad people don't, they work for the devil and they're trying to convince the good people with lies that creationism isn't true. He must be working for an oil company, because the devil owns all the oil companies.

    They get angrier - the world is swimming around their heads, the lies seem to have a magical power......the lies seem to have an evil magic, they're causing so much distress, so much confusion. The world is melting and spinning. Have to stop the lies to stop the world spinning, to make reality solid again.

    But the lies are not magical. There's no Satanic sorcery at play.

    The lies are just not lies.


  • Registered Users, Registered Users 2 Posts: 13,104 ✭✭✭✭djpbarry


    Lbeard wrote: »
    DJ, if you didn't have windows and a ceiling on your greenhouse, the warm air would escape, and cold air could enter and mix with the greenhouse air.
    You still haven't explained where the heat differential comes from in the first place.
    Lbeard wrote: »
    The air outside the greenhouse is getting just as much energy as the air in the greenhouse. Just the air outside can move more - that's how you get wind, clouds, rain, weather.
    Weather has more to do with uneven heating of the Earth's surface by the sun.
    Lbeard wrote: »
    How did you think a greenhouse worked?
    The air in the greenhouse is not heated directly by the sun to any significant degree - how could it be when it's transparent?

    Opaque surfaces, which absorb sunlight, are heated, and these in turn heat the air by conduction and convection. Because the air cannot escape, the warm surfaces can heat the air in the greenhouse to a higher temperature than the air outside the greenhouse. Another contributor is the fact that glass is virtually opaque to infrared, so thermal radiation within the greenhouse cannot escape.


  • Registered Users, Registered Users 2 Posts: 147 ✭✭citrus burst


    Lbeard wrote: »
    Citrus, before I get into a point by point response, I would like to talk a little about a psychological phenomenon known as cognitive dissonance and creationism.
    .
    .
    .
    .
    The lies are just not lies.
    I'm just interested in seeing how you think gases like O2 and N contribute directly to the heating of a planet.


  • Banned (with Prison Access) Posts: 311 ✭✭Lbeard


    djpbarry wrote: »
    You still haven't explained where the heat differential comes from in the first place.

    You're clutching at straws, DJ.
    Weather has more to do with uneven heating of the Earth's surface by the sun.
    The air in the greenhouse is not heated directly by the sun to any significant degree - how could it be when it's transparent?

    So now the air is transparent. Sure if it's transparent there must be no Greenhouse Effect at all.
    Opaque surfaces, which absorb sunlight, are heated, and these in turn heat the air by conduction and convection. Because the air cannot escape, the warm surfaces can heat the air in the greenhouse to a higher temperature than the air outside the greenhouse. Another contributor is the fact that glass is virtually opaque to infrared, so thermal radiation within the greenhouse cannot escape.

    More clutching at straws and contradictions. Magical infrared again, and the glass is opaque on one side, and transparent on the other. And the air in the greenhouse is no longer transparent to radiation.

    And in the end of the day we're just talking rubbish about back garden greenhouses, not the Greenhouse Effect, because DJ, in his straw clutching is hoping to catch me out. A diversion - he as well be going on about how a flash lamp works.. "If there are chickens, where is the chicken that laid the first egg?", "If we're descended from monkeys, how come there are monkeys still around?", "How can something as complex as the human eye be designed by chance?"

    Cognitive dissonance, DJ.


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