Comments by "Nigel Johnson" (@nigeljohnson9820) on "Global Heat: Britain sees longest heatwave in 42 years, deadly heat in Japan and Arctic forest fires" video.

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  12. Joseph Bloggs California has always had wild fires, but not as the same time as the rest of the world. The predictions for climate change is a 4 to 5 degree rise in the next forty years. It is easy to find reports that confirm global warming and ridicule Trump's position on the subject. This is not just ignorance on his part but willful denial of the scientific evidence so as not to inconvenience his billionaire donors who have huge vested interests in fossil fuels. The predictions of climate change are for increasingly unstable weather, oscillating between abnormal cold winters and record breaking hot summers, with a consistent increasing global temperature trend. Anyone who has worked with non-linear feed back systems will recognise the oscillations that occur when the system feedback phase and gain margins move from the system from negative to positive feedback. The idea that this is some Chinese plot to make us industry less competitive is just Ludacris, particularly as the Chinese are making great efforts to produce the green energy the world needs, having almost poisoning themselves with fossil fuelled power stations. If anything Trump's policy is going to leave the US with 19th century technology that the rest of the world will not buy. https://www.nytimes.com/2018/01/10/climate/climate-change-trump.html https://www.theguardian.com/environment/climate-consensus-97-per-cent/2018/may/29/trump-administration-refuses-to-consider-that-97-of-climate-scientists-could-be-right
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  19. Joseph Bloggs where did the UN get mentioned? Yes people like jobs, but they also like to be alive. If there jobs are killing them or the planet they should be seeking new employment. If these heat waves become regular events, then the food supply is going to literally dry up. The tax cuts do not benefit most people because they are paying for them in other ways. What is the point of more money in your pay packet if everything you buy is more expensive and you cannot afford health care. Only the super rich make money because as a percentage they pay much less tax, this far out weights the cost of their out goings, even if they are buying yachts or expensive cars. The problem is that most people do not look far beyond the headlines. They get a tax cut and think they are doing well, not correlating the cut with a much greater increase in their cost of living. Trump is allowing the corporation's to do as they like, ok unless it is your home that is poisoned by toxic waste or your water supply is polluted with organic poisons or heavy metals. Those nations that continue to use fossil fuels might see a very short term gain, but risk much greater long term losses. China is killing its own people with air pollution. The only reason they can do this is because the sick and dying much look after themselves, thus costing the government and industry nothing. This is where Trump is taking the US, if you are poisoned and are dying it is your problem. I agree that the democrats are not much better, but they are not the ones who are destroying the US environment, allowing drilling in national parks. If your politicians are corrupt it is your problem. The lobbying system in the US is a disgrace, it is nothing more than legalised bribery. US politicians do not work in the interests of the people they work for the corporation's that pay them the most. Need a toxic drug approved, pay to have it approved and get the health risks suppressed.
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  23. Joseph Bloggs maybe you can explain who benefits from the claim that global warming is man made? It is not as if the green energy industry already existed, unlike the fossil fuel Industries who are defending their billion dollar positions. So what is the purpose of the global warming conspiracy, other than saving the world from a disaster of biblical proportions, a mass extinction event? I did not responded to your comments about unusual cold weather events, such as snow in the Sahara. Extreme and unusual cold events are also consistent with the predictions of global warming. As I pointed out earlier. A nonlinear system with feedback tends to experience a period of extreme oscillation as the stability margins are eroded as negative feed back becomes positive. The oscillation swings become increasingly extreme as the system switches to a new stable state. More frequent and violet hurricanes and tornadoes are to be expected as energy is added to the system, as are ice storms. The extreme weather events are a small portent of what is to come. As energy is being trapped in the system, it is more likely to settle in a hot state than a cold. The other planets in the solar system show how bad it could get. Venus has a runaway green house effect, with surface temperatures of 400C. Give that solar output has been steadily increasing since the earth was formed, it is the complex feed back loops that have been regulating the planet's temperature. Some believe that life itself has played a part in regulating the temperature in a range suitable to sustain life, and if it had not evolved on earth when it did the earth's temperature would already be too high for liquid water to exist. It follows that if sufficient number of plants and lower animals are killed in an extinction event, the planet's temperature will reach that of the inorganic environment lacking the biological feedback components, from where there is no way back to an earth that sustains life. Hopefully the earth will stabilise at only a few degrees increase in temperature, but even that may be because the source of the pollution has been removed from the system, I will let you guess what that might be.
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  24. Joseph Bloggs you really don't have a feel for the physics. Venus is much smaller than the earth, closer to the sun. It is highly volcanic giving a dense CO2 and sulphuric acid atmosphere. It never had a chance for life to develope, so biological feed back never developed. It is questionable if life could ever have existed on Venus. The point is that the CO2 atmosphere shows how solar energy can be trapped in the atmosphere to produce extremely high temperatures. On the earth, early in its history before the solar output had reached today's levels, oxygen breathing life evolved and started to remove CO2 from the atmosphere, stabilising the global temperature. One of the major feedback loops that regulate the temperature is the amount of oxygen breathing life on the planet. When it is too cold, life dies back and CO2 levels rise, warming it to the point where organisms can thrive again removing the CO2. Add to much CO2 and other green house gasses and the biological feedback loop cannot cope and starts to die. The decaying bodies release further trapped gas heating the environment further. One of the big risks of global warming is that the oceans organisms will die allowing sea temperatures to rise and release huge deposits of trapped methane from the sea floor currently held as very cold solid methane hydrate. Methane being a much more efficient green house gas than CO2 would completely destabilise the system and killing all life on the planet. With the much higher solar output of today, oxygen breathing life would be unlikely to evolve again. It is quantitatively very difficult to model these complex systems, but it is relatively easy to visualise how they evolved and work. The earth's temperature regulation system is constantly being stress by natural forces such as variations in the solar output, geological action and the Milankovitch Cycles. A combination of physical/chemical and biological feed back has developed that tends to keep the planets temperature in a range where liquid water exists on its surface. This is critical to the existence of life, so the biological feedback has evolved to make it so. The system has been stressed further by the addition of man made green house gasses. Such stress will not initially produce any significant change in temperature as the system feed back allows it to adapt. But the reserves being used to stabilise the temperature are finite and are being used up. Over stress the system and threshold points are reached on the individual feed back loops and they stop working, or worse switch to positive feedback further increasing the temperature rise. This explains the step changes and purses in the temperature record. Anyone who has worked with electronic feed back systems will recognise the oscillations that accompany the onset of switching to overall positive feedback. That explains the cold events that interleave with the ever more frequent and intense hot events. All are signs of a system under stress that is about to switch state are obvious. Just because the world has not changed state yet, does not mean it will not do so in the near future. All the warning signs are there to be read. It just requires a basic understanding of nonlinear system dynamics and feed back to see what is going to happen unless we destressing the system. Positive feedback is applied to control systems to make them react rapidly. The changes to the earth's temperature may happen very rapidly when they start. We should all be very concerned by heat wave like the one we are experiencing at the moment. It may be just a one off random event or the start of a big lethal switch in global temperature state.
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  26. Joseph Bloggs I have taken a quick look at Al Gore's predictions. As far as I can tell the only problem is the time scale, he may yet be proved right. The models he was using at the time are not as complete as they are now. The basic physics is sound. It is not surprising that the climate changes in steps, with each increment opposed by some new feed back system that attempts to keep the temperature constant. It is a very complex system with many interactions. That does not mean we can stress it with impunity. At some point the system will run out of resilience and change will be dramatic. The argument that man's input is relatively small ignores the butterfly effect, where a small change is amplified by positive feedback in a system. I keep going on about feed back, but this is key to understanding the problem. Imagine running a home with air conditioning. A feed back loop in the air con is designed to keep the house temperature constant and cool. Now suppose the home owner switches on the cooker and takes a hot shower. The aircon response by stepping up its motor output to maintain a constant cool temperature. If the home owner continues to add heat sources, the air con continues to up its output to compensate. Sooner or later the air con motor is adding yet more heat and reaches its limit as to the cooling it can provide. At this point the temperature in the home starts to rise. The air con motor starts to over heat and fails. Without cooling the true effect of all those heat sources is felt and the house temperature rises dramatically, only limited buy the heat that can escape through the walls. In the scenario, the house temperature remained constant up to the point where the air con reached its limit and then it became part of the problem. It shows in a very simplistic fashion that we may be living on borrowed time and not know it. Before the point of failure the aircon might have switch on and off repeatedly as a result of a thermal overload switch, this would have resulted in the house temperature oscillating between cool periods and hot. Technically these are called limit cycles, as linear regulation has been replaced by nonlinear switching. This is equivalent of positive feedback where the gain of the system has become infinity. Again a very simplistic analogue to heat waves and cold events.
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