Are We Already Past the Point of No Return for Climate Change?


Via Flickr

Nicole Welle | November 16, 2020

A new study found that global temperatures may continue to rise for hundreds of years even after humans completely cut greenhouse gas emissions.

Authors of the study, which was published Thursday in the British Journal Scientific Reports, wrote that the only way to stop global warming would be to eliminate human-caused greenhouse gas emissions and find a way to extract huge amounts of carbon dioxide from the air, according to an article in USA Today.

The scientists used a model to study the effect of greenhouse gas emission reductions on the Earth’s climate from the year 1850 to 2500. They then created projections of global temperatures and sea level rises. The model showed that cutting greenhouse gas emissions at any point in the future will not be enough if it is the only tool humans employ to combat rising temperatures and sea levels.

As the burning of fossil fuels release gases like methane and carbon dioxide into the atmosphere, global temperatures increase. This causes Arctic ice and carbon-containing permafrost to melt, a process that releases even more carbon into the atmosphere and reduces the ability of Earth’s surface to reflect sunlight. Human action triggered these processes, and they will continue to warm the earth unless humans capture carbon in the atmosphere and make the Earth’s surface brighter, according to the study’s authors.

This study was an important thought experiment, but some environmental experts are skeptical about the accuracy of its results. Penn State University meteorologist Michael Mann said that the computer model used was too simple and failed to accurately represent large-scale atmospheric circulation patterns that could affect the results.

Regardless of the results’ accuracy, this study still reflects on the importance of finding ways to combat climate change even after global emissions reach net zero. The authors also urge other scientists to follow up and expand on their work.

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