Global Warming - The Evidence and Role of Water and CO2

[erichaynes88]

The majority of this video is good with the exception of the "runaway greenhouse".

The temperature effect of CO2 is logarithmic. You get the same temperature change from CO2 going from 200 to 400ppm as you get from it going from 400 to 800. It is difficult to support a tipping point here.

The computer models show positive feedback from water vapor and clouds but actual studies show negative feedback. That means on hotter days, more heat escapes into space reducing the temperature change.

[greg556677]

I'll admit that I fall squarely into the skeptical camp. The part of the AGW theory that I have a hard time believing is the positive feedback loop caused by water vapor; that a little warming by CO2 will cause runaway warming. I understand the concept in theory but it doesn't match reality in practice. A single hot year should have theoretically set off runaway global warming long ago if it were true. I believe that the negative feedback relating to water vapor (clouds) is underestimated.

[nybotheveg]

that was a great video. im doing a projekt on global warming in my school this week and it have helped alot.

[nybotheveg]

now that its hotter, and the CO2 levels according to this video should be going down, it cant because we keep feeding the atmosphere with now greenhouse gasses from our old and outdated teknologies.

[skeletorawrrr]

Uhm first of all... Even if CO2 made a substantial increase in temperature (which it doesn't) there is no possible way for humans to limit it's use...Well unless we want to drown out all the oceans and somehow get rid of the CO2 they produce! (Oceans are by far the largest producers of CO2) Relax, this has been going on since the earth was made... CLIMATE CHANGES, NATURALLY. Oh and damn water vapor...We should get rid of it, considering it amounts for 95% of greenhouse gases.

[jas2754]

yep as pointed out.... CO2 has much less effect than water vapor as a greenhouse gas.. CO2 at best it is a catalyst... that will help in a runaway greenhouse.... the runaway culprit however is water vapor not CO2....that is the nuanced point that everyone seems to miss.

[HolyCatholicApostoli]

@skeletorawrrr

Thank you for explaining that. How could they overlook that is it built into their models? Also doesn't significant amounts of heat escape into space?

What about the Role of the Sun and its activity?

[JonThm]

CO2 at 0.00037% has no affect on the wordl climate: That is a lie from nuclear power - who thuoght up the lie that is GW!

[davewatcher]

Could you include a graph to show the impact that the sun has on average temperatures?

[theaznfishy]

you killing yourself would reduce global warming.  Try it, i'm sure the scientific charts will drastically change!

[minilemur]

What a ridiculous collection of junk science. So - and I'm being sarcastic here - maybe we should have a Kyoto protocol to ban water as water vapour is the main greenhouse gas.

The truth is that far from there being the remotest possibility of a runaway greenhouse effect, it's logarithmic, i.e. ever declining.

[sunnygirl213]

"In searching for a new enemy to unite us we came up with the idea that pollution, the threat of global warming, water shortages, famine and the like, would fit the bill." -- Club of Rome members Alexander King and Bertrand Schneider in their book 'The First Global Revolution'

[jackferwerda]

Great Video. I really enjoy your informative lectures/videos. Please do more.

[jas2754]

Thank You for your kind words... I am brimming with ideas for videos, it is just a lack of time...have not been able to do any more.

But words like yours are encouraging.

[particlenumberfour]

i veiwed the increase in temperature as a phase in which the earth is going through and thought it vain that the human race thought it was to blame but then i also believe the earth is growing to one day become a gas gaint

so that shows you how much my opinion is worth

[ConservativeVoiceUSA]

Excellent video! 5/5

[jas2754]

Thank You ;-)  john

[neo1az]

Great video. Are we not coming out of an ice age? Temperatures would be expected to increase. It seems that the increase in CO2 is often thought to be due to burning fossil fuels. Has anyone compared this source to all other sources of CO2 including that produced by all organisms that output CO2?

[jas2754]

Thank You ! ....Are we coming out of an ice age? - yes we are and it would have been nice to see pictures of glaciers 200 years ago and compare them with the glaciers of 100 years ago and see if there was substantial recession over that period.

The answer is yes on CO2 from fossil fuel loading compared to other sources... but it is not easy to do!...that is the problem form what I can tell. MOre work is needed.

[neo1az]

I just wonder if the increase in CO2 is not primarily fossil fuels but a relative increase in animal life on the planet compared to plant life.

[jas2754]

I am looking into that as well.. just what are the relative percentages. If I come up with anything good I will let you know! john

[neo1az]

That would be great. It just seems that there is a huge amount of CO2 produced by animals from land to sea and from bacteria to humans. Then there are the other sources of CO2. If plants are decreasing then this could make the fossil fuel component minor.

[rabrasem]

Thank you for posting this great video!

[jas2754]

Hello Rabrasem

Thank You... appreciate the support. john