Climate Change, Fact Or Fiction?
Throughout the history of our planet, climate change has naturally occurred, and the human impact upon climate still remains small. In the last 650,000 years, there have been 7 distinct cycles of glaciers advancing and retreating. Climate change comes from minor deviations in earth's orbit around the sun.Major glacial (cold) and inter-glacial (warm) periods are moderated by changes in the Earth’s orbit around the Sun, called Milankovitch cycles. These cycles occur at different intensities on multi-millennial time scales. Orbital changes occur slowly over time, influencing where the Earth’s surface receives solar radiation during different seasons. By themselves, these changes in solar radiation distributions are not strong enough to cause dramatic temperature change. They do start mechanisms that amplify the slight warming or cooling effect caused by the Milankovitch cycle. One mechanism is caused through changes in global surface reflectivity also known as albedo. Even the slightest increase in solar radiation at the northern latitudes escalates ice melting.
As a result of ice loss, less sunlight is reflected from the bright white surface of the ice, and more radiation is absorbed by Earth increasing overall warming. A second mechanism involves atmospheric greenhouse gas concentrations, such as carbon dioxide.
The slight warming begun by changes in Earth’s orbit warms oceans allowing them to release carbon dioxide. As we’ve seen, more carbon dioxide in the atmosphere causes more warming, creating amplification. Rises in atmospheric CO2 levels may lag warming or cooling caused by orbital changes by as much as 1000 years. Climate cycles 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.
My Conclusion Humans may have some small impact on our climate that perhaps contributes 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 to follow the scare tactics being used by those that say “I believe the science” doomsday preachers. Educate yourself on the issues, use multiple sources of data to understand the dynamics of climate change, and it will become apparent that there are data sets that contradict both sides. I am a firm believer that we are being shammed by special interest groups who will skew anything just to give the appearance of progress to impress constituents with the impression that they are on top of voters' concerns, not unlike a snake oil salesman - to make a buck and, in their case, garner more votes (power).