Comic masterfully shows how climate has changed through time
For those seeking to deny the realities of climate change, a popular counterpoint is simply: "The climate has changed before."
It is a straightforward argument. And, it is difficult to refute. Thankfully, the amusing xkcd comic has a visualization showing just how misleading this statement can be.
For the inexperienced, xkcd is the brainchild of Randall Munroe. He is a cartoonist. He also is a physicist and former roboticist for NASA. Munroe has a knack for humorously and insightfully illustrating complex scientific topics. Munroe has dabbled across disciplines. He's gone from fun themes like time travel to foundational scientific concepts like DNA.
For this particular comic, xkcd tackled climate change. It looked back as far as the last glaciation. That is when Boston was buried under a mile of ice. Glaciers stretched towards Manhattan. Munroe traces changes in the Earth's climate up through modern times. Along the way, he tracks how the climate responds to melting ice sheets. He also looks at changes in the Earth's orbit and changing ocean circulations. They are all relative to the average temperature of the late 20th century.
Munroe aptly shows what the statement, "the climate has changed before," actually means. As you continue to scroll down and down and down, it becomes obvious that past climatic changes progress slowly and incrementally. The sudden final veer to the right at the bottom of the graphic, which represents human-caused climate change, is a stunning contrast to the otherwise minute changes.
NASA said last year that August 2016 was the warmest August ever recorded. That is over 136 years of recordkeeping. August 2016 actually wound up tied with July 2016 as the warmest month ever recorded. This is despite the fact that the seasonal temperature cycle typically peaks in July.
Last year, Brazil joined the Paris climate agreement, adding a dash of optimism to the foreboding data released by NASA. Home to the largest tropical rainforest on Earth, Brazil has the fourth-largest emissions of any country to sign the agreement. It trails behind only the U.S., China and India. The U.S. has since withdrawn from the Paris climate agreement. Only three countries have not signed on. Those are Syria, Nicaragua and now the United States.
With these things in mind, take a scroll through time and check out Munroe's comic.
CRITICAL THINKING QUESTION
Why are cartoons an effective way to communicate?
Write your answers in the comments section below