COP31 in Turkey faces reality of rising global temperatures

Negotiators are meeting in Turkey this week for the COP31 climate summit. The gathering comes as the world warms faster than previously planned. Countries are discussing how to manage a future that is already changing.

The 1.5-degree Celsius limit agreed upon ten years ago is now out of reach. Average global temperatures are already close to that threshold. New data from the United Nations suggests the planet will warm to 1.7 or 1.8 degrees Celsius under the best-case scenario. If current emissions continue, the world could be 2.8 degrees Celsius hotter by the end of the century.

Tim Lenton, a climate professor at the University of Exeter, says every fraction of a degree matters. He notes that avoiding even small amounts of warming limits harm. "Every fraction of a degree that we avoid is really able to do a huge amount of limiting harm," Lenton said.

Coral reefs face immediate danger from these temperature shifts. Corals build the framework for many marine species and support hundreds of millions of people. Four global bleaching events have occurred since the late 1990s. A strong El Niño pattern is likely causing a fifth event right now. A study published last month in Nature found that 44% of coral species are at risk of extinction. David Obura, director of CORDIO East Africa, stated that time is critical in this process.

The difference between 1.5 and 2 degrees of warming determines whether reefs survive. The Intergovernmental Panel on Climate Change projects that 99% of corals would be lost if warming exceeds 2 degrees. Obura explained that while some species might remain, many would be too rare or compromised to function. Conservation groups are now working to restore reefs and breed heat-tolerant corals to help them withstand the changes.

Human populations also face greater risks as temperatures rise. For every tenth of a degree of warming, 140 million more people are exposed to dangerous heat. Last summer, an estimated 50,000 people in Europe died from heat-related causes. Lenton compared the human body to a system with a tipping point. He noted that physiology reaches a limit where the worst outcome is death. Many of these deaths are not fully counted in official statistics.

Warmer air also holds more moisture, which fuels intense storms. Each degree of warming allows air to hold 7% more water vapor. This leads to heavier downpours, a trend already visible in the United States. Scientists also warn that higher warming increases the risk of other tipping points, such as the collapse of Antarctic glaciers. That meltwater would raise sea levels globally. Lenton said that less warming controls the risk of crossing these thresholds.

At the Turkey summit, countries are not expected to make major new emission cuts. Instead, talks are focusing on a new goal for electrification. This shift aims to power more cars and homes with electricity rather than fossil fuels. Since more electricity now comes from solar and wind sources, this change could help reduce overall emissions.