Iceland's Climate Minister, Johann Pall Johannsson, has declared the potential collapse of the Atlantic Meridional Overturning Circulation (AMOC) a national security risk and an existential threat. This move allows the government to prepare for worst-case scenarios as the current system brings warm water from the tropics northward, helping to keep Europe's winters mild. However, rising temperatures and melting Arctic ice could disrupt this flow, leading to a modern-day ice age with severe winter temperatures and increased snow and ice in Northern Europe. The AMOC has collapsed before, notably before the last Ice Age, and scientists warn that it could happen again within the next few decades. Iceland's ministries will be on alert, coordinating a response, and assessing research and policies needed. The risks span energy, food security, infrastructure, and international transportation. The potential collapse could have far-reaching effects, including destabilizing rainfall patterns in Africa, India, and South America, and accelerating warming in Antarctica. Scientists emphasize the need for urgent action as the tipping point may be close, and the science is evolving rapidly. Iceland is taking proactive measures, recognizing the potential impact on marine transport, agriculture, and fisheries. The country is not waiting for long-term research but is instead focusing on immediate preparedness and adaptation strategies.
