turn off

There are realistic ways to reverse or mitigate climate change. Scientists make it simple by choosing four best ways.

Buzz 60

According to a scientific study published on Thursday, even if man-made greenhouse gas emissions are reduced to zero, global temperatures may continue to rise for centuries thereafter.

The authors of the study reported in the British “Science Reports”: “The world is no longer an irreversible moment for global warming.” They said that the only way to stop warming is “a large amount of carbon dioxide must be extracted from the atmosphere.” “.

The burning of fossil fuels such as oil, coal, and natural gas releases greenhouse gases such as carbon dioxide and methane into the atmosphere, causing global temperatures to rise and sea levels to rise.

Scientists simulated the impact of reducing greenhouse gas emissions on the Earth’s climate change from 1850 to 2500, and predicted global temperature and sea level rise.

Jorgen Randers, Honorary Professor of Climate Strategy at BI Norwegian Business School, said: “According to our model, when greenhouse gas reduction is used as a single tool to stop the permafrost melting, mankind is irreversible.” told Agence France-Presse.

Landers said: “If we want to stop this melting process, we have to do other things, such as absorbing carbon dioxide from the atmosphere and storing it underground and making the surface of the earth brighter.”

Scientists have seen the “acceleration of the pandemic”: They are paying attention to climate change

The study reports that by 2500, the temperature of the earth will be 5.4 degrees Fahrenheit higher than the temperature in 1850. The sea level will be about 8 feet higher.

The author believes that as the continuous melting of Arctic ice and carbon-containing permafrost increases the water vapor, methane and carbon dioxide in the atmosphere, the global temperature may continue to rise after the reduction of man-made greenhouse gas emissions.

The melting of Arctic ice and permafrost will also reduce the area of ​​ice that reflects solar heat and light.

According to this study, in order to prevent the author’s projected temperature and sea level rise, man-made greenhouse gas emissions must be reduced to zero between 1960 and 1970.

In order to prevent the global temperature and sea level from rising after the cessation of greenhouse gas emissions, and to limit the potential catastrophic impact on the earth’s ecosystem and human society, starting from 2020, at least 33 gigatons of carbon dioxide must be removed from the atmosphere each year. The authors say , Carbon capture and storage methods.

According to Business Insider data, this is approximately the total amount of carbon dioxide emitted by the global fossil fuel industry in 2018.

An expert from Pennsylvania State University meteorologist Michael Mann said to USA Today that he doubted the computer model used in the study: “The climate model they used is a very low-complexity model. Model. It does not actually represent large-scale atmospheric circulation patterns, such as ocean circulation, etc.

“Although such models are useful for conceptual inferences, their predictions must be greatly doubted. More realistic climate models can solve the large-scale dynamics of the ocean, atmosphere, and carbon cycle, but will not produce huge changes. The author is based on Its very simplified model was debated.

Mann said: “Not only use a grain of salt, but also the entire salt content.”

Another expert, Mark Maslin, a professor of climate science at University College London, also pointed out the shortcomings of the model and told AFP that the study was a “thought experiment.”

Maslin said: “This research really caught people’s attention. Reducing global carbon emissions to zero by 2050 is just the beginning of our actions to address climate change.”

The study authors urge other scientists to follow up on their work: “We encourage other model makers to explore our findings in (larger) models and report their findings.”

More: Research says that recent global warming has eliminated 6,500 years of cooling

Read or share this story: https://www.usatoday.com/story/news/nation/2020/11/12/reducing-greenhouse-gas-emissions-stop-climate-change-study/3761882001/