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The Forum > Article Comments > Bushfires and climate change > Comments

Bushfires and climate change : Comments

By Don Aitkin, published 17/1/2020

More houses have been lost than ever before, but then there are more people than we have ever had before, five times as many as we had a century ago.

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The evidence is pretty clear to me.
1. The atmosphere contains traces of Carbon Dioxide: 0.03% when I was at school and 0.04% now.
2. Radiation from the Sun, sunlight, passes through the atmosphere and warms the surface of the Earth and the atmosphere above.
3. The warmed surface and the warmed atmosphere above it radiate heat.
4. The infrared radiation from the warmed surface and the atmosphere cannot escape and remains within the atmosphere.
5. This occurs because Carbon Dioxide is transparent to sunlight but it is opaque to infrared radiation.
6. The earth's atmosphere works to transfer heat from the equatorial or tropical areas and move it to the polar areas.
7. A warmer atmosphere can holds larger amount of water.
8. When water is in the atmosphere it cannot be on the ground, hence droughts in some places.
9. Water can also fall from the atmosphere as hail, snow or flooding rains.
Why are we having a discussion about climate change when the evidence is all around us?
Posted by Brian of Buderim, Monday, 20 January 2020 9:18:14 AM
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Come on Brian, do a little math on the subject.

Water vapor is over 20 times more effective at absorbing long wave radiation than CO2, & there is over 100 times more of it in the average bit of atmosphere,.

That makes water vapor 2000 times more effective in any reflection that may occur. CO2 is a very minor bit player in the temperature budget of the planet, not even worth considering.
Posted by Hasbeen, Monday, 20 January 2020 9:31:11 AM
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Are you going to post this bit or rationalising elsewhere Brian.

To copy you,
Come on Brian, do a little math on the subject.

Water vapor is over 20 times more effective at absorbing long wave radiation than CO2, & there is over 100 times more of it in the average bit of atmosphere,.

That makes water vapor 2000 times more effective in any reflection that may occur. CO2 is a very minor bit player in the temperature budget of the planet, not even worth considering.
Posted by Hasbeen, Monday, 20 January 2020 9:34:03 AM
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I just don't get it, if it is co2 we put in the atmosphere that is
causing all these fires, then what is the co2 the Chinese, Indians and
US are putting in the atmosphere doing ?
Are we wasting our time ? Just let it burn, those countries don't care !
Doing something to windward comes to mind !
Posted by Bazz, Monday, 20 January 2020 1:48:27 PM
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Hasbeen,

Water vapour is hymn number 36 in the Denialist hymn book.

Yes, water vapour IS the most powerful greenhouse gas, but the amount of it isn't changing. There's no rain coming in from space or anything. So why is the planet warming up?

Basically, there's no new water appearing on earth but we are adding a whole bunch of CO2 into the atmosphere.

"Water vapour is the most dominant greenhouse gas. Water vapour is also the dominant positive feedback in our climate system and amplifies any warming caused by changes in atmospheric CO2. This positive feedback is why climate is so sensitive to CO2 warming."
http://skepticalscience.com/water-vapor-greenhouse-gas.htm
Posted by Max Green, Monday, 20 January 2020 1:55:20 PM
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Max Green, in your consideration of the CO2 and H2O model, remember that water vapour is a normal production of combustion. In a simple example, in very rounded figures for every 50 tonnes of CO2 produced from burning CH3 methane, there is approximately 20 tonnes of new water produced. So, yes, there is more water vapour in the atmosphere every day.
Posted by Jay Cee Ess, Monday, 20 January 2020 2:20:59 PM
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