Climate Change

Is Climate Change Fact Or Fiction

 

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

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.

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).


Climate Change, Fact, Hoax

Climate Change, Fact, Hoax