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Old 03-02-2019, 08:42   #1336
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Re: Climate Change - what to expect for cruising life

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I do not know what you are trying to say. CO2, like water vapour is a greenhouse gas. It absorbs in the infrared. The earth radiates in the infrared. Therefore, rather loosely, maybe, CO2 has a warming effect. If it was absent the earth would be over 30 degC colder.You are employing semantics to hide your apparent lack of understanding of basic physics.


Frank,

No CO2 does not absorb lots of heat. The specific heat of CO2 is in fact less than air. If absorption by CO2 was the problem then other gases would be worse than CO2.

CO2 acts as a reflective filter. It attenuates radiation by reflecting certain frequencies better than other gases. But the amount of heat that CO2 can absorb is next to nothing.
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Old 03-02-2019, 08:44   #1337
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Re: Climate Change - what to expect for cruising life

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I do not know what you are trying to say. CO2, like water vapour is a greenhouse gas. It absorbs in the infrared. The earth radiates in the infrared. Therefore, rather loosely, maybe, CO2 has a warming effect. If it was absent the earth would be over 30 degC colder.You are employing semantics to hide your apparent lack of understanding of basic physics.
fact co2 does not posses the ability to produce thermal radiation. Therefore it can not heat anything that's simple physics. Try it .
Co2 is a molecular compound nothing more nothing less


You argument still doesn't explain what man has to do with it .
And be technical and specific.
Prove mans part conclusively.
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Old 03-02-2019, 08:47   #1338
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Re: Climate Change - what to expect for cruising life

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Explain yourself so that I might answer you sensibly.
I will let tony explain it to you.
https://wattsupwiththat.com/2016/07/...matic-optimum/

its in the ice core records .
Why is it not reflected in modern " climate models" ?
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Old 03-02-2019, 08:47   #1339
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Re: Climate Change - what to expect for cruising life

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why don't you admit its the sun that controls the earths climate?
As I keep saying man has little to no effect on the climate . Its the sun.
Obviously, the source of all our energy is the sun but it is changing only slowly with significsnt changes being cyclic and not leading to long term, centennial scale, change. The controlling factors are those that determine how the heat from the sun drives the climate system.
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Old 03-02-2019, 08:55   #1340
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Re: Climate Change - what to expect for cruising life

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Obviously, the source of all our energy is the sun but it is changing only slowly with significsnt changes being cyclic and not leading to long term, centennial scale, change. The controlling factors are those that determine how the heat from the sun drives the climate system.
tell that to all the people that died during the maunder minimum.

Side note many of the recent cold records that were broken were set in 2009 the last solar minimum. Now if you look at the cold record years ( the same holds for the heat records ) you will find the vast majority happen during solar minimums .
Explain that without saying any of it is related to solar output.
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Old 03-02-2019, 09:05   #1341
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Re: Climate Change - what to expect for cruising life

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Global warming occurs because energy from the sun arrives at various frequencies or wavelengths (same thing). The Earth intercepts and converts that energy to heat and warms. Any mass warmer than another body will radiate energy away at frequencies that are much lower than most of the energy from the sun. CO2 acts as a filter at lower frequencies and attenuates some of this radiation. Other gases are also frequency selective filters. Gaseous water is a really good filter as is CH4 and CO2. Each gas has a different frequency that it can effectively filter. The amount of filtering is a function of the concentration (PPM) and other factors. So not all the energy is radiated away until the planet reaches a kind of thermal equilibrium. In that way it is kind of like the car getting hot. Other gases reflect the energy we receive from the sun before it reaches lower altitudes.

Itís a hugely complex set of factors which GW people admit. But they talk with great certainty about something no one truly comprehends. And propose upending society as the ďsolutionĒ. Thatís where most people get worried.


On your description you are pretty close. A couple of suggestions. The energy from the sun comes at the frequency based on the temperature of the sun. So 5780k which yields a wavelength of about 4 ums. The earth radiates back to space at its temperature which is 280k or 10-15 ums. CO2 and other gases donít act like filters ie blocking, they absorb the radiation. When they absorb it, they radiate it back just like earth did. That radiation is in all directions including back to earth which is why it warms the earth. Same as the glass in the greenhouse radiates back heat inside the greenhouse. Be happy to point you to websites that explain the physics far better than I can.

This part of the science has been known for more than 100 years. Nobody has dreamed it up to change the world order, you can get it from physics textbooks. What is more complicated are all the feedbacks both positive and negative to understand how much the earth will warm as CO2 amount is changed .

My point is to understand the basics which is not that complicated. Then you can argue about how much the temperature is going to change or not, what are reasonable solutions and how all of this will effect your sailing in the future
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