UN Warns Global Warming to Exceed 1.5°C Threshold Within Years
AM730 · 2 SOURCESabout 3 hours ago2 MIN
Summary
The United Nations Environment Programme (UNEP) released a report on Wednesday (September 2) warning that global temperatures are expected to exceed the critical 1.5°C threshold above pre-industrial levels within the coming years. This surpasses the target set by the 2015 Paris Agreement and will trigger more extreme weather events while increasing pressure on ecosystems, glaciers, and low-lying coastal cities worldwide .
The report emphasizes that while returning warming below 1.5°C remains theoretically possible, it involves significant uncertainties and requires immediate, substantial reductions in carbon emissions alongside active removal of carbon dioxide from the atmosphere, such as through large-scale afforestation . The UNEP warns that each year of delay and every additional 0.1°C of warming increases risks and recovery difficulty, potentially causing irreversible damage even if temperatures eventually decline .
Key Points
- A glacial collapse at the China-Nepal border last week triggered a massive landslide that killed and missing over 5,000 people, highlighting the deadly impact of climate-driven glacier instability .
- Scientists from the University of Portsmouth identified over 3,100 glaciers worldwide experiencing "surging glacier" phenomena, where slow-moving ice suddenly accelerates, causing floods and avalanches .
- Eighty-one of these surging glaciers pose major threats, with most located in the Karakoram mountain range spanning China, Tajikistan, Afghanistan, Pakistan, and India .
- The best-case scenario shows warming peaking at 1.8°C if all climate pledges are fulfilled, while maintaining current policies could lead to 2.6°C by 2100 .
- UNEP stresses that limiting the duration of temperature exceedance above 1.5°C is now the primary focus, requiring both rapid decarbonization and carbon removal technologies .
Why It Matters
The crossing of the 1.5°C threshold represents a fundamental shift in the global climate system, signaling that extreme weather events—from intensified typhoons to devastating landslides—will become more frequent and severe. For Hong Kong, a coastal city of over seven million people, this means heightened risks from rising sea levels, more powerful tropical storms, and the cascading effects of climate disruptions on food supplies, infrastructure, and public health systems that depend on global stability .
The crossing of the 1.5°C threshold represents a fundamental shift in the global climate system, signaling that extreme weather events—from intensified typhoons to devastating landslides—will become more frequent and severe. For Hong Kong, a coastal city of over seven million people, this means heightened risks from rising sea levels, more powerful tropical storms, and the cascading effects of climate disruptions on food supplies, infrastructure, and public health systems that depend on global stability .