Hot Newsslotbet Top climate scientist declares 2C climate goal ‘dead’
This aerial pictures shows drifting broken sea ice, off the extreme western point of Replot Island, in Kvarken archipelago, near Bjorkoby, in the northern part of the Baltic Sea on January 15, 2025. Due to a mild winter and temperatures above zero degrees centigrade, the open sea has not frozen. Agence France-Presse
WASHINGTON — Holding long-term global warming to two degrees Celsius — the fallback target of the Paris climate accord — is now “impossible,” according to a stark new analysis published by leading scientists.
Led by renowned climatologist James Hansen, the paper appears in the journal “Environment: Science and Policy for Sustainable Development” and concludes that Earth’s climate is more sensitive to rising greenhouse gas emissions than previously thought.
Article continues after this advertisementCompounding the crisis, Hansen and colleagues argued, is a recent decline in sunlight-blocking aerosol pollution from the shipping industry, which had been mitigating some of the warming.
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An ambitious climate change scenario outlined by the UN’s climate panel, which gives the planet a 50 percent chance of keeping warming under 2C by the year 2100, “is an implausible scenario,” Hansen told a briefing Tuesday.
Article continues after this advertisement“That scenario is now impossible,” said Hansen, formerly a top NASA climate scientist who famously announced to the US Congress in 1988 that global warming was underway.
Article continues after this advertisement“The two degree target is dead.”
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Article continues after this advertisementInstead, he and co-authors argued, the amount of greenhouse gases already pumped into the atmosphere by burning fossil fuels meant increased warming is now guaranteed.
READ: Last 2 years crossed 1.5°C global warming limit, says EU monitor
Article continues after this advertisementTemperatures will stay at or above 1.5C in the coming years — devastating coral reefs and fueling more intense storms — before rising to around 2.0C by 2045, they forecast.
elite slotsThey estimated polar ice melt and freshwater injection into the North Atlantic will trigger the shutdown of the Atlantic Meridional Overturning Circulation (AMOC) within the next 20–30 years.
The current brings warmth to various parts of the globe and also carries nutrients necessary to sustain ocean life.
Its end “will lock in major problems including sea level rise of several meters — thus, we describe AMOC shutdown as the ‘point of no return,'” the paper argued.
The world’s nations agreed during the landmark Paris climate accord of 2015 to try to hold end-of-century warming to 1.5C above pre-industrial levels.
Scientists identified the threshold as critical to preventing the breakdown of major ocean circulation systems, the abrupt thawing of boreal permafrost, and the collapse of tropical coral reefs.
The 1.5C target has already been breached over the past two years, according to data from the EU’s climate monitoring system Copernicus, though the Paris Agreement referred to a long-term trend over decades.
At 2C, the impacts would be even greater, including irreversible loss to Earth’s ice sheets, mountain glaciers and snow, sea ice and permafrost.
The authors acknowledged the findings appeared grim, but argued that honesty is a necessary ingredient for change.
“Failure to be realistic in climate assessment and failure to call out the fecklessness of current policies to stem global warming is not helpful to young people,” they said.
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“Today, with rising crises including global climate change, we have reached a point where we must address the problem of special interestsslotbet,” they added, stressing they were “optimistic” for the future.
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