I’ve been entertained by recent articles that the increases in carbon dioxide in the atmosphere has prevented an ice age. Just guessing, but I predict most scientists and other citizens would vote for global warming if the choice was an ice age. Warming and increased carbon dioxide results in increased crop yields and more robust growth of trees while freezing results in poor or non-existent crop yields and people dying at higher rates from cold and starvation.
One explanation for why global warming has saved us is associated with something called the Milankovitch cycle. To avoid getting into tedious technical details, the cycle refers to how changes in the Earth’s orbit around the sun changes, which also causes changes to the amount of sunlight received by the earth. (To state the obvious, the primary source of global warming is sunlight.) Citation needed (I admit that I copied the idea of using “citation needed” when an statement is made about an obvious fact from Randall Munroe’s excellent book “What If,” which I recently reviewed.)
To be “fair and balanced” there have been articles disputing the accuracy of claims that increased carbon dioxide in the atmosphere has been good. I was confused by articles that referred to sun spots causing aberrations instead of discussing the Milankovitch cycle, but then again, I’m not a trained climate expert.
I’ve noticed that there has been a scramble to explain why global temperatures didn’t continue to rise after 1998, even though 2014 might have broken that trend. One explanation is that the oceans are storing the excess heat. Now we have to consider something called Milankovitch cycles or sun spots.
I just checked the National Snow and Ice center’s report on Arctic sea ice, and the ice coverage for 2014 bounced around the average coverage for 2011-2012. It has recently just dipped slightly below that average line. Wasn’t the ice supposed to be gone by now?
For those new to this debate, I assure you I believe climate change is real as supported by the fact that the climate has always changed. Citation needed