It is CO2 causing AGW

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It is CO2 causing AGW

Postby HBS Guy » 20 Nov 2017, 21:14

Abstract

Ample physical evidence shows that carbon dioxide (CO2) is the single most important climate-relevant greenhouse gas in Earth’s atmosphere. This is because CO2, like ozone, N2O, CH4, and chlorofluorocarbons, does not condense and precipitate from the atmosphere at current climate temperatures, whereas water vapor can and does. Noncondensing greenhouse gases, which account for 25% of the total terrestrial greenhouse effect, thus serve to provide the stable temperature structure that sustains the current levels of atmospheric water vapor and clouds via feedback processes that account for the remaining 75% of the greenhouse effect. Without the radiative forcing supplied by CO2 and the other noncondensing greenhouse gases, the terrestrial greenhouse would collapse, plunging the global climate into an icebound Earth state.


http://science.sciencemag.org/content/330/6002/356
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Re: It is CO2 causing AGW

Postby HBS Guy » 21 Nov 2017, 07:15

While the sun supplies practically all the heat arriving at the top of the atmosphere it is not the factor causing the increase in temperatures since the 1980s: the sun has been sending less radiation since then so we should be in a cooling trend:

Image

If it isn’t the sun causing the heating and it isn’t it must be what is in the atmosphere and on the surface that is causing the warming. Specifically, water vapor but also CO2 that keeps evaporation higher and more water vapor in the atmosphere. Also the albedo effect as light colored snow and ice reflecting back most of the sunlight being replaced by dark ocean and rock that absorbs the sunlight, causing warming, as the ice and snow melts.

It is the CO2 and the other GHGs.
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Re: It is CO2 causing AGW

Postby HBS Guy » 21 Feb 2018, 22:21

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412ppm
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Re: It is CO2 causing AGW

Postby HBS Guy » 26 Feb 2018, 17:47

An interesting new study in paleoclimate research.

Pollen was used: pollen spreads widely in bloom season, settles in lakes and resists degradation for millions of years.

What did the study find?

The authors used the pollen of various plants to help determine where they thrived in the deep past. I communicated with Dr. Bryan Shuman, from the University of Wyoming and I asked him why they used pollen. He responded:

Pollen works well as a temperature recorder because plants have specific temperature ranges that they can tolerate. By combining the temperature requirements for dozens of different plants that we can recognize from their pollen, we are able to narrow down the possible temperatures at the location where the pollen was collected.

We use pollen rather than other plant fossils because pollen is widespread each spring and settles to the lake bottom where it is surprisingly resistant to degradation. We wash the samples of lake bottom mud with acids that can dissolve minerals, but the pollen can tolerate it. It lasts up to millions of years with degrading.


Yeah yeah yeah, that is WHY POLLEN but what did the study show?

What the authors found was very interesting. Using data from 642 sites across North America and Europe, the temperatures they found closely matched those expected from computer simulations. They found that throughout most of the Holocene period (the last ~11,000 years), the Earth was warming very slightly. Only in the last ~2000 years has the Earth been in a cooling period (which probably would have continued except that human emissions of greenhouse gases have now reversed the cooling).


https://www.theguardian.com/environment/climate-consensus-97-per-cent/2018/feb/19/pollen-data-shows-humans-reversed-natural-global-cooling

How fucking hilarious is this? All these wankers, like Booby, mewling about Teh Ice Age and we would be a lot closer to one but for us burning fossil fuels! Oh dear.
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Re: It is CO2 causing AGW

Postby HBS Guy » 14 Mar 2018, 11:13

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Re: It is CO2 causing AGW

Postby HBS Guy » 14 Mar 2018, 11:28

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Re: It is CO2 causing AGW

Postby HBS Guy » 14 Mar 2018, 11:42

https://www.carbonbrief.org/major-correction-to-satellite-data-shows-140-faster-warming-since-1998

A reanalysis of satellite weather observations show the world has warmed faster and more than was thought. This fits in with the finding that the seafloor has sunk 1mm because of the extra water in the seas due to icemelt. The sea floor sinking shows there was more icemelt than was thought so this fits with the more/faster melting detected by satellite observations.
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Re: It is CO2 causing AGW

Postby HBS Guy » 02 May 2018, 08:38

Ha! Great lecture on AGW by Richard Alley:



Poor Booby, he is wrong about Cosmic Rays! At one time the suns magnetic field was really low and we got plastered with CRs. Zero effect on climate! I knew that, had done a bit of googling on it, Booby relies on faith and faith will lead you astray all the time.
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Re: It is CO2 causing AGW

Postby MilesAway » 03 May 2018, 14:15

Bobby has admitted he is just being a contrarian for contrarians sake... he admitted this years ago!
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Re: It is CO2 causing AGW

Postby HBS Guy » 03 May 2018, 17:07

Booby now is totally sucked in by liar-for-profit Dubyne. Not just being contrarian.
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Re: It is CO2 causing AGW

Postby MilesAway » 03 May 2018, 17:31

HBS Guy wrote:Booby now is totally sucked in by liar-for-profit Dubyne. Not just being contrarian.

No one is sucked in Dubyne.... not even Bobby: he's just being a child hating contrarian becuase it's fun until he hits the nursing home!
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Re: It is CO2 causing AGW

Postby HBS Guy » 27 May 2018, 14:36

Image

From a great blog on greenhouse gases and AGW:

https://chriscolose.wordpress.com/2010/02/18/greenhouse-effect-revisited/

WARNING: LOTS of maths involved :bgrin
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