UN Climate Report Warns World Will Overshoot 1.5°C Warming Limit
UN Climate Report Warns World Will Overshoot 1.5°C Warming Limit
A newly released United Nations climate report has warned that the world is on course to exceed the 1.5°C global warming threshold set under the Paris Climate Agreement within the next few years, highlighting the urgent need to limit the severity and duration of the temperature overshoot. According to the report, crossing the 1.5°C threshold is now considered unavoidable in the near term. The priority, therefore, is to keep the period during which global temperatures remain above the target as short as possible and ultimately bring average global temperatures back down.
The 1.5°C limit is a central goal of the 2015 Paris Climate Agreement, under which countries committed to holding the increase in global average temperature to well below 2°C above pre-industrial levels while pursuing efforts to limit warming to 1.5°C. Scientists have repeatedly warned that every additional fraction of a degree of warming increases the risks of extreme heat, drought, flooding, rising sea levels and other climate-related disasters. The report’s warning shifts attention towards limiting how far temperatures rise above 1.5°C and how long they remain there. Although temporarily exceeding the threshold would increase climate risks, sustained action to reduce greenhouse gas emissions could help limit the extent of the overshoot. Returning temperatures to lower levels would require substantial and sustained reductions in emissions, alongside measures to remove carbon dioxide from the atmosphere. However, the feasibility and effectiveness of these measures depend on the scale of global action and the speed at which emissions decline. The findings underscore the importance of accelerating the transition away from fossil fuels, expanding clean energy, improving energy efficiency and protecting forests and other natural carbon sinks. Governments, businesses and international institutions face mounting pressure to strengthen climate policies and fulfil their emissions-reduction commitments. Delays in cutting greenhouse gas emissions could result in a higher temperature peak, a longer period above the target and more severe consequences for vulnerable communities. Developing countries, particularly those with limited resources to adapt to climate impacts, remain especially exposed to the effects of rising temperatures. While the prospect of temporarily exceeding 1.5°C presents a serious challenge, the report’s message is that the scale of the damage is not predetermined. Rapid emissions cuts and sustained international cooperation could still reduce the extent of warming and help bring temperatures back down over time.
