Study Reveals Shrinking Timeframe to Contain Global Warming to 1.5 Degrees

Our global carbon budget to avoid permanently reaching 1.5 degrees of warming is smaller than we previously thought, new research says. A study published this week in the journal Nature Climate Change found that the planet can only emit another 250 gigatons of carbon dioxide for a 50% chance of reaching 1.5 degrees Celsius (2.7 degrees Fahrenheit) of global warming by the end of this decade.

WatchThe M3 MacBook Pro: Made Dark for Halloween CCShare SubtitlesOffEnglishUnlike the IPCC report, the report released this week looked at the effect of aerosols alongside the rising carbon emissions in climate models. Aerosols are microscopic particles that include solid or liquid and are suspended in a gas. These particles can have a warming and a cooling effect on our climate, according to NASA. For example, sulfur dioxide, which comes from burning fossil fuels, form droplets in the atmosphere that reflect sunlight and alter cloud brightness. This can have a cooling effect over time. But as the world works to phase out fossil fuel emissions, there will be fewer of these particles. This is technically a good thing, because it means less air pollution globally. But because the Earth will not have the potentially cooling effects of some aerosols, we will need to emit even less CO2 in order to mitigate overall aerosol loss, the study explained.Advertisement“The remaining budget is now so small that minor changes in our understanding of the world can result in large proportional changes to the budget,” Robin Lamboll, the lead author of the study, said in a statement. “The lack of progress on emissions reduction means that we can be ever more certain that the window for keeping warming to safe levels is rapidly closing.”AdvertisementBut why exactly is 1.5 degrees Celsius of warming so important? That number may not seem big, but the planet has warmed 1.2 degrees Celsius since the preindustrial era began. This had already fueled worsening extreme weather events. Avoiding further warming beyond the threshold is necessary to stop these events from getting even worse. If the planet reaches two degrees of warming, an additional 65 million people would experience dangerous heatwaves each year, compared to 1.5 degrees of warming.There is some hope for not reaching 1.5 degrees so quickly. Investments in renewable energy are on the AdvertisementBut there have been some setbacks. The climate crisis has fueled conditions, including heat and drought, that There are so many signs of what would be in store if we don’t decrease our emissions. 2023 has seen the Advertisement“Every fraction of a degree of warming will make life harder for people and ecosystems,” Robin Lamboll said. “This study is yet another warning from the scientific community. Now it is up to governments to act.”Want more climate and environment stories? Check out Earther’s guides to decarbonizing your home, divesting from fossil fuels, packing a disaster go bag, and overcoming climate dread. And don’t miss our coverage of the latest carbon dioxide removal, and the invasive plants you should rip to shreds.

Based on reporting by gizmodo.com.