Climate Change Fact of Fiction?
Through the history of our planet climate change as been naturally occurring. The effects on our climate by humans is very small. In the last 650,000 year there has been 7 distinct cycle of glaciers advancing and retreating. Climate change can be attributed to minor deviations in the orbit around the sun.
Major glacial (cold) and inter-glacial (warm) periods are started by changes in the Earth’s orbit around the Sun, called Milankovitch cycles. These cycles have occurred at different intensities on multi-millennial time scales. The orbital changes occur slowly over time, influencing where solar radiation is received on the Earth’s surface during different seasons. By themselves, these changes in the distribution of solar radiation are not strong enough to cause large temperature changes. They do start mechanisms that amplify the slight warming or cooling effect caused by the Milankovitch cycle. One of those mechanisms is caused through changes in global surface reflectivity also known as albedo. Even the slightest increase in solar radiation at the northern latitudes increase ice melt. As a result of ice loss, less sunlight is reflected from the bright white surface of the ice, and more of the radiation is absorbed by the Earth, increasing overall warming. A second mechanism involves atmospheric greenhouse gas concentrations, such as carbon dioxide. The slight warming started by changes to Earth’s orbit warms oceans, which allows them to release carbon dioxide. As we’ve seen, more carbon dioxide in the atmosphere causes more warming, creating an amplifying effect. Rises in atmospheric CO2 levels may lag warming or cooling caused by orbital changes by as much as 1000 years.
There are shorter cold-warm cycles that occur on approximately 200 to 1,500 year. The mechanisms that cause these cycles are not understood completely but are thought to be driven by changes in our sun. Ocean and atmospheric interactions cause climate cycles of years to decades. One of the most well-known cycles is the El Niño-Southern Oscillation, an interaction between ocean temperatures and atmospheric conditions referred to as El Niño or its opposite effect, La Niña. These events occur every 3 to 7 years, bringing different weather conditions to different parts of the world. For example, in the U.S., El Niño events can result in a flow of warm dry air into the Northwest, but above average rainfall in the southeast. There are additional cycles that last from 25 to 80 years.
We may have some small impact on our climate that perhaps contribute to these cycles being more significant in what we would consider extreme weather. We do need to be aware of the fact that climate change is one of the most constant events in the history. We don’t need follow the scare tactics being used by those that say “I believe the science” doomsday preachers. Educate yourself on the issue use multiple sources of data to understand the dynamics of climate change. You will see that there are data sets that contradict both sides. I am a firm believer that we are being shammed by special interest groups that will skew anything to make a buck.
Climate Change, Fact, Hoax
Paid for by Samuel Lee Williams Jr for Congress