tzor wrote:PLAYER57832 wrote:Before I tackle the rest any further, exactly what is it that you see challenges Global Climate change. The report I was talking about, where the time it would take the Himalayan Glaciers to disappear was wrong, was due to a flat error that should have been caught, but wasn't. Nothing in that report really truly challenged Climate change theories.
(Note:
I was writing my response when I lost my internet connection; a long story short the wrong window appeared at the wrong time and I lost my train of thought as well. I’m a write once sort of person. That is what I am. But I will try to do my best to recreate my argument again.)
First and foremost, we need to understand that climate change occurs on a local and global level all the time and that both natural and man made factors influence that change. The first question is the potential problem of a “tipping point” a change in climate that is irreversible and would be the end of all life as we know and love it.
You are confusing 3 different issues here.
First, the climate of Earth IS changing. That is a fact. It is changing in ways that will harm humans. That is also a fact.
The second issue is whether human being are contributing to this change. This is mostly considered true. Many, many things we have done and are doing impact our earth's climate. We understand enough to know this is happening, but not to understand all the ramifications of this. That is where the debate lies .. first, in exactly what the changes will be and the exact impact we are having. Even so, in a broad sense we do know that adding "greenhouse gases" (shorthand for what I know are some very complicated things) is making things bad for human beings in most areas. (with help to a few other areas).
The third issue is what we can and should do about it. This is where the heaviest debate lies. However, most of the debate lies not in the technology, it is on whether we should pay more attention to the short-term economics. Unfortunately, too many people wish to deny that ALL Economics is necessarily "short term" ... even 20 years is not long when considering climate, but it is more than any economic projection can possibly predict... even 2 year predictions have a very, very low accuracy rate. So, basically, a lot of people with a lot of money can "out shout" all science in this matter, because too few people have the time, energy and knowledge to look into the real issues.
tzor wrote:[
As far as I am aware there is only one major tipping point in the history of the earth that destroyed all (or almost all) life as it existed at the time. This was the change in the earth from a non oxygen atmosphere to an oxygen atmosphere, made possible by the creation of oxygen creating plant life and the movement of volcanoes from under water to above water. (The conditions of an underwater volcano tend to fix any free oxygen to minerals almost immediately which is why most surviving aerobic life forms live next to hot volcanic vents.) But this is perhaps more of a critique of anaerobic life as opposed to the more complex aerobic life. (And remember if we still haven’t managed to completely solve the oxygen problem which is why people need a healthy supply of antioxidants in their diet.)
Sorry, but you are wrong. The fossil record shows several die-offs and explosions. Each one represented a "tipping point" to life. Not ALL life, but to over 90% of whatever was present at the time. (I don't want to argue percentages, but there have been more than a few "tipping points"). The causes of these is debated. In at least one case, it was almost certainly predelicted by a meteor. However, its unlikely only one event was the cause for any of these events.
More importantly, your concentration on ONE big "tipping point" that will end all life on earth completely misses the point. What climate scientists are putting forward, what we need to worry about is not the absolute tipping point, it is the smaller "tipping points" that will very fundamentally alter the economic structure and political structure here and now.
Just to pick out an example, the error mentioned involved melting of the Himalayan ice caps. They won't melt in 35 years, unless things are speeded up (possible). HOWEVER, they are melting. Those glaciers feed virtually all of Asia.. the Ghanges, the yellow, etc. Each of those represent major wheat and rice producers. Add in that a lot of grain, right now, is being produced from "fossil" aquifers.. that is water that is from ages past, that is not being replenished. Saudia Arabia is public about depleting theirs. We in the US like to deny ours, but the entire grain belt relies upon a big fossil aquifer that is, effectively being "mined" to grow grain.
What happens when ANY of these are impacted? HIgher food prices, that is what. More hunger. Now, here in the US we export huge amounts of food. So, it might not seem like an issue. EXCEPT, in the 1970's, we were able to keep grain prices low by cutting off trade. Now, if we were to try and do that, China, the largest nation on Earth would have something to say about it. China, who owns a large portion of our national debt. China who is a military as well as economic power.
So, if the HImalayas are impacted.. not just if they disappear, but if the flows are reduced significantly, something that will happen LONG before they completely disappear (is already happening in smaller ways right now), we are likely to see increased food prices, economic catastrophe and starvation right here in the US.
That in no way requires the kind of "tipping point" to which you refer.
In fact, concentrating on such major tipping points is part of the problem.. they deflect from the real and true issues that we need to solve every day, right here.
tzor wrote:Once aerobic life formed on the planet, the planet became massively stable and has been able to sustain conditions for life for billions of years.
Not really. We no longer have Dinosaurs. We no longer have Mastodons. The entire evolution of human beings is now thought to have been advanced because of huge climate changes on Earth. (let me add in that I absolutely believe human evolution was "god-driven", just to cut off that argument here... I will discuss that on other threads, not here).
tzor wrote:One of the problems of the reports is that they rely on assumptions made in various computer models. They also greatly reduce the complex feedback system that has developed over time on the earth. The computer models that predict hurricanes, for example, are only possible because there are so many hurricanes that come alone and test the model and yet we still need a half dozen different models to get a reasonable average of what might happen for any given hurricane.
The thing is you cannot make predictions on a micro scale. Predicting hurricanes is an extreme micro-scale. Even so, they can do pretty well anymore. However, the climate changes don't require such micro scale knowledge. Some of the fixes, do. Knowing which particular fix might or might not work, in SOME cases, NOT ALL!!!!, requires micro knowledge. However, I would point to a river. I might not be able to tell you exactly which point will erode when with 100% accuracy. I CAN tell you where floods will almost certainly occur in the next few decades (given a stream system I have studied, understand, of course).
tzor wrote:One occasionally points to our sister planet in the solar system, Venus, for worst case scenarios of tipping points. But Venus’ atmosphere is 96.5% CO2 and 3.5% N2. By contrast the atmosphere of the Earth is 78% N2 and 21% O2. This should be enough to set warning flags to even a casual observer, but I cannot find any source on the web that will actually try to throw some percentages to the composition of the pre-oxygen atmosphere. Given that N2 is a byproduct of volcanoes I strongly doubt that it was a “trace” element in the early non oxygen atmosphere of the anaerobic age. So why is there so little N2 in the atmosphere of Venus?
Again, you are talking about "end of life" scenarios. While studying these is helpful, it is not what the debate is really and truly about. yes, I know people debate the "end of Earth" and so forth, but most climatologists want to avoid that scenerio.
That is the whole point.
tzor wrote:Now let’s consider methane, which is also a greenhouse gas far worse than CO2. But according to most data, this gas started to go relatively off the chart around the 1800’s (from 600-800 ppb to double that at 1600 ppb). We ain’t dead yet.
Do you remember that silly so called “science fiction” show Seaquest DSV in the early 1990’s? They were predicting that by 2018 the world would force everyone to be vegetarian because the primary source of global warming was methane produced from cattle. (Mega farms do pose a major hazard to the environment, causing huge areas of uninhabitable waters in the Gulf of Mexico, for example, but the notion that we have to have the mass extinction of a species to save the planet is one of those stupid progressive clap traps that still continue to pollute the scientific debate in modern times. Many people still use climate change as a convenient cover for population control proposals.)
All of this doesn’t matter a hill of beans compared to the normal every day cycles of nature. El Niño and La Niña still cause more death and destruction than most perceived problems of “climate change.” Ironically, one man’s disaster could be another man’s salvation; studies indicate that dust from Africa in the upper atmosphere could be responsible for lowering the severity of hurricanes in the Atlantic. (
See: ScienceDaily (Feb. 20, 2008) “African Dust Storms May Cool Atlantic, Lessen Hurricanes”) And of course, there is nothing like a good old fashioned earthquake to cause death and destruction especially if it happens in the depths of the oceans.
This doesn’t mean that I have a lazy attitude towards the activities of man. Coal energy generation used to produce acid rain that destroyed rivers and lakes. Smog kills people in urban areas. Most of the developing world still uses their primary sources of clean water as their sewer systems, made even more ironic because what are now filthy rivers of foul contamination are still “holy” and “sacred” rivers that people regularly go to bathe in.
Most of the people in the world still live in the worst spot to live when looking at the long term. I live on something called Long Island. Ages ago one of the great ice ages scraped the surface off of a portion of North American and like a snow plow left this big pile of dirt right off of the edge of the land mass between the ocean and the edge of the continental shelf. Climate change does happen in geologic time and the only solution is to adapt.
Again, I am not even disputing most of what you say... and THAT is part of the problem. I know you to be educated, of above-average intelligence and even more informed than most. Yet, you completely and utterly mistate the problem and seem to be relying upon 3rd and fourth hand interpretations of the documents you say are lies.