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Iceland's view of the Atlantic Ocean current collapse as a security and existential risk

Iceland's climate minister said that the government has classified the collapse of an Atlantic Ocean current as a threat to national security and an existential concern, which allows it to plan for worst-case scenarios.

Warm water is brought from the tropics to the Arctic by the Atlantic Meridional Overturning Circulation (AMOC). This warm water flow helps keep Europe's cold winters mild. Scientists warn that the flow of the Atlantic Meridional Overturning Circulation (AMOC) could be disrupted by the cold water from Greenland melting the Arctic ice. The collapse of AMOC would trigger a new ice age in which winter temperatures in Northern Europe would plummet to extreme cold, resulting in more snow and ice. AMOC collapsed before - most notably, just before the last Ice Age ended 12,000 years ago. Iceland Climate Minister Johann Pall Johannsson stated by email that the AMOC is a threat to national security and resilience. This is the first instance that a climate-related phenomena has been brought before the National Security Council in a formal capacity as an existential threat. Johannsson stated that Iceland's Ministries will be alert and coordinate a response as the issue is elevated. The government is currently evaluating what additional research and policies it needs, while working on a policy for disaster preparedness.

The risks being assessed cover a wide range of topics, including energy security and food safety as well as infrastructure and international transport.

A collapse of the Atlantic current could have far-reaching consequences that extend beyond Northern Europe. Scientists say it could destabilize rainfall patterns that subsistence farmers in Africa, India, and South America have relied on for decades.

Climate change could contribute to a faster warming of Antarctica. The sea ice that surrounds the southernmost continent, as well as the ice sheets on top are already threatened by climate change.

Scientists warn that the global temperature is continuing to rise and that a collapse of the AMOC could be inevitable in the next two decades.

The Nordic Council of Ministers sponsored a workshop called "Nordic Tipping Week", in which 60 experts assessed how society could be affected. Organizers said they are currently finalizing the recommendations that came out of the meeting.

Aleksi Nummelin is a physical oceanographer with the Finnish Meteorological Institute. Scientists from over 30 universities and organizations raised the alarm on Monday about the rapid thawing Earth's glaciers and ice sheets. Climate ministries and meteorological services in Northern Europe have said they will fund more research, while also evaluating possible risks as part of their climate adaptation plans.

Ireland's Weather Service said that its scientists briefed Ireland's Prime Minister last year, and a Parliamentary Committee last month. Norway's Environment Ministry said that it is "seeking new research to further our understanding" of AMOC before deciding whether or not to classify AMOC a security threat. Britain has said that it is following scientific reports which suggest an abrupt collapse in this century will be unlikely. It has also invested more than 81 millions pounds in research to determine when Earth's climate system might reach a point where there is no turning back.

The tipping point could be very close, said Stefan Rahmstorf, oceanographer and climate scientist at Germany's Potsdam Institute for Climate Impact Research.

Iceland is taking no chances as the rate of global warming continues to accelerate and greenhouse gas emissions continue their rise. Johannsson stated that extreme weather conditions could have a serious impact on our ability to maintain agriculture and fisheries which are vital to our economy and our food systems.

We cannot wait until long-term, definitive research is completed before taking action." Reporting by Ali Withers in Copenhagen and Stine Jacobsen; editing by Katigle Daigle and David Gregorio

(source: Reuters)