Saturday, November 7, 2009

Do you believe in global warming

The fact is that temperatures change, there are warming trends and cooling trends. When scientists look to explain what causes these trends, they have different theories based on their area of expertise. Environmental scientists would be inclined to believe that the trends are caused by environmental changes like the effects that pollution has on the ozone layer. Astrophysicists would be more likely to blame the solar flares that shoot out from the sun. The specialist you choose will give you the answer based on what he knows.

Considering that my area of expertise is construction, my theory is based on a measurement or an angle being off. The earth revolves around the sun in an elliptical pattern, this is what causes the change in seasons. During the winter, the earth is farthest from the sun and during the summer it is closest That's a fairly simple concept. What isn't a simple concept is what keeps the earth on that same course year after year. So, if the earth varies from that course, even a little bit, we would notice a change in temperature.

Now keep in mind that I am not a scientist so my numbers are more approximative and I'm not going to research this to find more exact numbers for a very good reason that I will get to later. The earth is traveling at about 1500 miles per hour and it still takes 365 days to get around that ellipse. That's a very big ellipse. What keeps the earth on this relative path is not set in stone either. It's not like there is a solid track holding it in place. Instead, it is hundreds of little factors like mass, velocity, gravity, etc. Now, if one of those factors deviates even a small fraction and the earth is off it's previous path by even a thousandth of an inch, it could be off by miles at the other end of that huge ellipse.

I didn't use accurate numbers because I don't think there are any. I don't think there is a way to precisely measure just how fast the earth is traveling or just how large that ellipse is or just how far the earth is from the sun at any given date. So I use rough numbers because they work better for this example. We can accurately measure the temperature on a given date but we can only roughly measure the distance from the sun. Until we can accurately measure any of these larger scale factors, all we have is theories as to what causes variations in temperature from year to year.

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