From Nasa, "Global warming is an increase in the average temperature of Earth's surface. Since the late 1800's, the global average temperature has increased about 0.7 to 1.4 degrees F (0.4 to 0.8 degrees C). Many experts estimate that the average temperature will rise an additional 2.5 to 10.4 degrees F (1.4 to 5.8 degrees C) by 2100. That rate of increase would be much larger than most past rates of increase. " In other words, Global warming is the heating of the atmosphere and the domino effect that that heating has on our world and our lives.
Global warming is caused by a myriad of factors which include big business (CO2 emission), vehicles, the clearing of trees and plantlife (which absorb CO2) and natural heating from the sun itself.
The biggest fear that global warming poses is the potential for drastic and unpredictable weather changes. Life is difficult when you can predict most major storms two or three days in advance, but it would be devastating to not have this preparation time.
Not only is there the threat of violent storm potentially destroying our shelters and/or directly causing us harm, there is also the threat that a sudden storm could impact our means of food gathering, our means of transport, and our financial stability (insurance can only survive for so long).
The contentious part of global warming isn't whether the atmosphere is heating up, but rather whether or not this heating up is part of a cyclical process.
In an article in the National Post (Forget global warming: Welcome to the new Ice Age by Lorne Gunter Feb 25/08), the concept of Global cooling was brought to the forefront; namely, that our climate is about to go through an annual cooling where winters are supposed to get colder every year (the end point is contentious, though, whether it just gets really cold or we make it to another ice age).
"Gilles Langis, a senior forecaster with the Canadian Ice Service in Ottawa, says the Arctic winter has been so severe the ice has not only recovered, it is actually 10 to 20 cm thicker in many places than at this time last year.
OK, so one winter does not a climate make. It would be premature to claim an Ice Age is looming just because we have had one of our most brutal winters in decades.
But if environmentalists and environment reporters can run around shrieking about the manmade destruction of the natural order every time a robin shows up on Georgian Bay two weeks early, then it is at least fair game to use this winter's weather stories to wonder whether the alarmist are being a tad premature."
Basically, the world has always had stretches of warmth and stretches of cold. Global warming became the fear of the masses as we got close to the end of the period of warmth and the polar ice caps were in the worst shape they've been in in 40 years (naturally, progressive heat are going to make the caps worse every year, meaning that the last year or two of every natural warming would be the worst the polar caps have been). But now, we are heading into La Nina, the period of Global cooling. And in year one alone, the ice caps gained 10cm of density.
At this point, there hasn't been a lot of real debate on the issue of Global Warming. One group says the world will cease to exist in 20-30 years (personally, I think they should be forced to provide conclusive data, or be subjected to inprisonment for creating mass panic). NASA believes the atmosphere will increase between 2.5 and 10.4 degrees between now and 2100 (this would suggest a cyclical model where every warming period gets progressively warmer. Globalwarminghoax.com were one of the first groups to point out that the polar ice caps are not only better now than they were last year, but they are actually denser than they were in 1980.
And then there is another problem with the whole concept. Where is this mystical current that takes all the polar water south? El Nino (the warm wind) and La Nina (the cool wind) are tropical winds that blow northernly bringing warmer or cooler temperatures north from the equator. The polar ice caps clearly have absolutely no bearing on temperature and weather, because the warming would have lasted beyond when El Nino's warm winds blew (due to a trickle-down (or inertia) effect.
Without more data, and each group ceasing to bicker at one another using partial arguments and the expert analysis of climatologists (some of whom are simply glorified guessers), the only conclusion to make is that Global Warming is a cyclical issue, where we will go through 40 years of cooling, followed by 40 years of warming. Each cycle seems to be getting worse now compared to the past two or three cycles, but there have been much worse cycles (including ice ages and periods of extreme heat). It is quite likely this is exacerbated by our reckless disregard for the environment (CO2 emissions specifically), but it is also quite likely that the emissions will start to cause grievous harm to the people before the climate does (lung cancer is already a major problem and more CO2 emissions only lead to more crippling breathing-related issues).
The likely conclusion is that Global Warming/Cooling is an issue that will eventually become a serious issue, but as an adaptive species, we will be able to cope for at least a few more centuries (and that is assuming that it continues to get worse). It cannot be denied as a reality because the world is heating and cooling cyclically anyway. The scope of how big of a problem it is can be fully questioned, however, due to the lack of complete research, and the prominent use of guesswork in most research that has been done. Instead of trying to predict what the weather will be like tomorrow, it might make more sense to figure out how much of a difference walking to work makes instead of driving. And for the jokers who claim Armageddon will happen within 20-30 years (Intergovernmental Panel on Climate Change, a group who doesn't carry out any of their own studies; only publishes prominent scientists findings in the name of the UN with complete discretion in what they manipulate in the studies themselves), maybe they should try to present some real data to back up their claims, instead of trying to play Chicken Little. To quote a couple of scientists who vehemently disagree with IPCC (from Wikipedia):
Reid Bryson (1920-2008) believed global warming was primarily caused by natural processes.
Emeritus Professor of Atmospheric and Oceanic Sciences,
University of Wisconsin-Madison, in 2007 he said: "It’s absurd. Of course it’s going up. It has gone up since the early 1800s, before the Industrial Revolution, because we’re coming out of the
Little Ice Age, not because we’re putting more carbon dioxide into the air."
[62]Hendrik Tennekes, retired Director of Research, Royal Netherlands Meteorological Institute: "The blind adherence to the harebrained idea that climate models can generate 'realistic' simulations of climate is the principal reason why I remain a climate skeptic. From my background in turbulence I look forward with grim anticipation to the day that climate models will run with a horizontal resolution of less than a kilometer. The horrible predictability problems of turbulent flows then will descend on climate science with a vengeance."
[14]Robert M. Carter, geologist, researcher at the Marine Geophysical Laboratory at
James Cook University in Australia: "the accepted global average temperature statistics used by the
Intergovernmental Panel on Climate Change show that no ground-based warming has occurred since 1998 ... there is every doubt whether any global warming at all is occurring at the moment (June 2007), let alone human-caused warming."
[8]Jan Veizer, environmental geochemist, Professor Emeritus from
University of Ottawa: "At this stage, two scenarios of potential human impact on climate appear feasible: (1) the standard IPCC model ..., and (2) the alternative model that argues for celestial phenomena as the principal climate driver. ... Models and empirical observations are both indispensable tools of science, yet when discrepancies arise, observations should carry greater weight than theory. If so, the multitude of empirical observations favours celestial phenomena as the most important driver of terrestrial climate on most time scales, but time will be the final judge."
[49]And of course, there are quotes that ask "Who cares?" such as
Sherwood Idso, former research physicist,
USDA Water Conservation Laboratory, and adjunct professor,
Arizona State University: "[W]arming has been shown to positively impact human health, while atmospheric CO2 enrichment has been shown to enhance the health-promoting properties of the food we eat, as well as stimulate the production of more of it. ... [W]e have nothing to fear from increasing concentrations of atmospheric CO2 and global warming." (2003)
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