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Xelebes said:Have any of you seen the charts or graphs depicting the actual temperature of the globe over the last 1,000 years taken from ice sample cores from the Greenland's and Antarctica glaciers? If I can locate them, I will show them to you.
But until then, I shall have to describe them to you. As Liar can attest to, it is possible to analyse charts in the same manner as sound - that is responding variableover a manipulated variable (most often case here: time.)
Anywho, if you look at the chart you will see a sharp rise from 1860 and on. This is what we are currently worried about. I forget what the amount was for the rise - 1.6 C or something. Once I can locate the chart I can give you more accurate numbers. But take a look at the time before that and what you'll see is like a 0.2 - 0.4 C drop or something like that over 800 or so years. There is a peak around 1400 or something but then it goes downhill some more.
What does this remind me of? Sawtooth form with natural static. What is that comparable to in something a little bit more applicable? Listen to a violin playing a simple note, evenly bowed with the bow at a nice angle. Or for something even more practical, try plucking a guitar string. That is what I am thinking this reminds me of.
When you pluck a string, there is a force exerted on the string which is a slow push to a direction which it then releases to sharply return to it's previous state and then goes a bit further with the inertia involved. From the looks of the chart I saw, the cycle looks about to be a 5-10 milennia long cycle.
Of course, humans may be helping push it this time, but I certainly think the climate change would be interesting to note down as deserts might no longer be deserts anymore and might actually turn into very fruitful territories which in turn might cause some wars and such and such and such... the list goes on.
Now, to hunt down the chart and harass some people into helping me find that chart.
Rising global temperatures are expected to raise sea level, and change precipitation and other local climate conditions. Changing regional climate could alter forests, crop yields, and water supplies. It could also affect human health, animals, and many types of ecosystems.
Scientists know for certain that human activities are changing the composition of Earth's atmosphere. Increasing levels of greenhouse gases, like carbon dioxide (CO2 ), in the atmosphere since pre-industrial times have been well documented. There is no doubt this atmospheric buildup of carbon dioxide and other greenhouse gases is largely the result of human activities.
It's well accepted by scientists that greenhouse gases trap heat in the Earth's atmosphere and tend to warm the planet. By increasing the levels of greenhouse gases in the atmosphere, human activities are strengthening Earth's natural greenhouse effect. The key greenhouse gases emitted by human activities remain in the atmosphere for periods ranging from decades to centuries.
A warming trend of about 1°F has been recorded since the late 19th century. Warming has occurred in both the northern and southern hemispheres, and over the oceans. Confirmation of 20th-century global warming is further substantiated by melting glaciers, decreased snow cover in the northern hemisphere and even warming below ground.
amicus said:Lime...Exelebes....
thebullet said:To Lucifer_Carroll:
You've been listening to Ian Malcom too much. Yes, Earth will abide. But hey, I'm a human and I want to abide too. I'd like my grandchildren to have a nice life, and their grandchildren as well.
So I won't throw up my hands and say, 'whatever happens, happens. We can't hurt the Earth no matter how hard we try'. Although this is true, we can make the Earth a pretty miserable place to live for the next several thousand years.
So I'll tilt my lance and continue to attack the windmill that is Amicus and his neocon brethren in hopes that if I can't convince them, at least I can move them the hell out of the way.
cantdog said:Besides which, the primary weapons intended to be used to address the difficulty are conservation, efficiency, and sustainable power systems.
What on earth is wrong with any of those, except that it limits the wealth of the coal and oil people? ...
amicus said:Y'all leave me with a wry smile....
The long disproved claim to fame of Malthus...was that he saw population growth as exponential and food supplies as linear. He drew the conclusion that population would outstrip the worlds capacity for food and other resources.
He was proven wrong, literally and figuratively...long, long ago.
amicus...
bloodsimple said:Just a couple of thoughts -
The earth may be slightly warmer than it was 100 or 150 years ago. It is not any warmer than it has been on a number of occasions in history (when there was no industrial production), and the rate of temperature change is not as steep as it has been on some previous occasions, judging from ice core readings etc.
Environmentalists are very quick to point out any increase in temperature, but remember that this is average temperature (i.e. averaged over the 24 hours). In fact, where increases have been recorded, most of this increase is in night-time temperatures rather than average maxima. This suggests the "increase" may be linked more to amounts of rain, cloud cover, and to wind strength. There may be many reasons for these unconnected with industry (volcanic activity, changes in sea currents, etc).
The earth's climate is immensely complicated and none of the climatology models comes close to explaining it. Do you know how they get these predictions of earth's temperatures in the future? They take the swirls of clouds, pressure systems etc from thirty or forty years ago, and then run through every single day, and then take that model forward through every day for 100 years. It only takes a tiny adjustment in their assumptions, the mechanics of the model, or a one-off event like Mt St Helens, to totally screw up their predictions. So forgive me if I don't get too excited by them. My weather forecaster often fails to get within 3 degrees Celcius of the actual figure for the day, so I don't have much faith in their over-simplistic attempts to tell me what it will be like in 2104.
There is no doubt that the world would be a better place for less pollution, greater biodiversity and sustainable energy sources. But science has failed to prove a causal link with the items it cites as directly leading to "global warming". It has become an orthodoxy no scientist in need of research funding dares to query. Remember, 600 years ago most people thought the earth was flat. Took a brave man to prove them wrong.
bloodsimple said:Just a couple of thoughts -
Remember, 600 years ago most people thought the earth was flat. Took a brave man to prove them wrong.
amicus said:Mr. Wiggins...aka thebullet...
What I found on several sites, by searching 'natural absorption of CO2 gases' illustrates again that the burning of fossil fuels and other acts of mankind barely contribute to any change in the atmosphere.
amicus....