Atlantic Meridional Overturning Circulation Collapse Risk

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SUMMARY

New modeling on July 28, 2026, indicates that meltwater from the Greenland ice sheet will significantly weaken the Atlantic Meridional Overturning Circulation (AMOC) by up to 40% by 2300, though a complete collapse is unlikely. As of July 28, 2026, observational evidence confirms a basin-wide AMOC slowdown more severe than initially projected, with some studies suggesting a collapse could occur as early as 2050. A July 9, 2026, study suggests the collapse may already be unavoidable, with probabilities ranging from 10% to 23%, potentially rising to 80% by 2100 under a worst-case emissions scenario. This weakening could lead to sharp cooling in Northern Europe, altered rainfall patterns, and a substantial release of stored ocean carbon, adding up to 0.27°C to global warming.

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July 2026 — 5 developments

  1. New modeling suggests Greenland ice melt to weaken AMOC by 40% by 2300, but not cause collapse

    New modeling indicates that meltwater from the Greenland ice sheet will significantly weaken the Atlantic Meridional Overturning Circulation (AMOC) by up to 40% by 2300, but is unlikely to cause a complete collapse. This weakening is in addition to declines projected by other climate models, with observational evidence of a basin-wide slowdown more severe than initially projected.

  2. AMOC Collapse Warning Sign Identified: Freshwater Flow Decline and Economic Impacts

    A new study suggests a decline in freshwater flow into the Atlantic Ocean could precede an AMOC collapse by approximately 25 years, serving as a potential warning sign. Economically, a rapid collapse could alter Europe's climate up to ten times faster than previously anticipated, impacting agriculture, energy, and insurance markets.

  3. New Study: AMOC Collapse May Be Unavoidable, With 23% Probability

    A new study suggests the collapse of the Atlantic Meridional Overturning Circulation (AMOC) may already be unavoidable, with probabilities ranging from 10% to 23% depending on Greenland's ice meltwater. Under a worst-case emissions scenario, this probability could rise to 80% by 2100, leading to sharp cooling in Northern Europe and altered rainfall patterns.

  4. New studies suggest AMOC collapse could occur sooner, intensify storms, and accelerate global warming

    New modeling suggests a collapse of the Atlantic Meridional Overturning Circulation (AMOC) could occur as early as 2050, potentially unfolding up to 10 times faster than current climate change. A collapse could also lead to a substantial release of stored ocean carbon, adding up to 0.27°C to global warming. A University of California, Riverside study projects that a slowing AMOC will intensify storms along the California coast while reducing snowfall over Greenland.

  5. Scientists Warn Atlantic Ocean Current Weakening Faster Than Predicted

    New research published in Geophysical Research Letters indicates that the Atlantic Meridional Overturning Circulation (AMOC) is decelerating more rapidly than previously projected. Scientists are interpreting a cold patch in the North Atlantic as a potential early warning sign of an eventual collapse, with the cooling extending deep underwater.

June 2026 — 5 developments

  1. Scientists Find Direct Observational Evidence of Atlantic Ocean Circulation Slowing Down

    Researchers have found direct observational evidence that the Atlantic Meridional Overturning Circulation (AMOC) has been steadily declining over the past two decades. This slowdown, linked to rising Arctic temperatures and increased freshwater input, could lead to altered weather patterns worldwide. The findings suggest the AMOC plays a crucial role in regulating Earth's climate.

  2. Iceland Considers AMOC Collapse a National Security Risk Amidst New Warnings

    Iceland is considering the potential collapse of the Atlantic Meridional Overturning Circulation (AMOC) as a national security risk. Switzerland is also noted as being unprepared for such an event, with the scenario not included in federal climate assessments. These developments highlight ongoing concerns about the AMOC's weakening and its potential global impacts.

  3. Finland Launches Research Project on Atlantic Ocean Current Deterioration

    Finland has launched a new research project to better understand the impacts of AMOC deterioration and prepare for them. This initiative aims to update national risk assessments and climate adaptation strategies in response to growing concerns about AMOC instability.

  4. US Dismantles Ocean Monitoring System Amid AMOC Collapse Warnings

    The U.S. is dismantling a critical ocean observation system for monitoring Atlantic currents, including the AMOC, despite scientists' warnings of its potential collapse. Recent studies suggest the AMOC could weaken by approximately 50% by 2100, leading to severe climate impacts. This action occurs as Germany plans to integrate AMOC collapse into its European security policy.

  5. Germany to Treat AMOC Collapse as European Security Issue

    Germany plans to treat the potential collapse of the Atlantic Meridional Overturning Circulation (AMOC) as a European security issue in its climate risk assessments. This reclassification highlights the growing urgency and perceived impact of AMOC's weakening, with calls to upgrade AMOC monitoring to critical infrastructure.

May 2026 — 5 developments

  2. New research suggests AMOC could weaken by 51% by 2100, with collapse risks increasing

    New research indicates the Atlantic Meridional Overturning Circulation (AMOC) could weaken by as much as 51% by 2100, a rate significantly higher than previous projections. Scientists have identified systematic errors in climate models that underestimate this weakening, and a collapse could turn the Southern Ocean into a carbon source, adding 0.2°C to global warming.

  3. AMOC Observing Systems Face Collapse Due to Underfunding; New Studies Detail Carbon Release Risk and Circulation Shifts

    AMOC observing systems are reportedly 'at the brink of collapse' due to underfunding, risking continuous data collection needed for climate projections. A new study simulating an AMOC shutdown suggests it could trigger a substantial release of stored ocean carbon, potentially adding to global warming. Additionally, new modeling indicates that a strengthening of the Nordic Seas Overturning Circulation may be a symptom of AMOC weakening.

  4. Researchers propose Bering Strait dam to mitigate AMOC collapse risks

    Researchers have proposed building a dam across the Bering Strait as a potential measure to slow the effects of climate change on the Atlantic Meridional Overturning Circulation (AMOC). This proposal comes amid warnings that the system may be heading toward collapse.

  5. New studies show increased risk of AMOC collapse, with calls for urgent action

    New research indicates a 50% risk of the AMOC collapsing this century, a substantial increase from previous estimates, with some studies showing a 10% slowdown since the early 2000s. Iceland's Climate Council has urged dramatically scaled-up emissions cuts in response to mounting evidence of AMOC weakening and potential collapse.

April 2026 — 1 developments

  1. Key Atlantic Current AMOC Nearing 'Apocalyptic' Collapse, New Study Warns

    A new study published in *Science Advances* indicates that the Atlantic Meridional Overturning Circulation (AMOC), a crucial system for global climate regulation, is significantly closer to collapse than previously thought. The research estimates a potential weakening of 43% to 59% by the end of the century, with a tipping point possibly occurring by mid-century, after which collapse would be irreversible. The potential consequences of an AMOC collapse are severe, including drastic temperature drops in Northern Europe, extreme droughts in Southern Europe, rising sea levels along the North American east coast, and disruption of global food webs. The findings have generated widespread concern and reporting across various news outlets.

January 2025 — 1 developments

  1. International Report Details Accelerating AMOC Weakening Trend

    An international consortium of scientists releases a report detailing the latest observational data and model projections for the AMOC. The report highlights an accelerating trend of weakening and increased variability, reinforcing concerns about its stability and potential for abrupt shifts.

May 2024 — 1 developments

  1. North Atlantic 'Cold Blob' Linked to Weakening AMOC, Raising Tipping Point Concerns

    A recent study links the 'cold blob' in the North Atlantic to a weakening Atlantic Meridional Overturning Circulation (AMOC), a critical heat-distributing system. This phenomenon, exacerbated by freshwater influx from melting ice sheets, raises concerns about a potential tipping point that could lead to catastrophic climate shifts, with some models suggesting it could be crossed around mid-century.

February 2024 — 2 developments

  1. Iceland Declares Potential AMOC Collapse a National Security Threat

    Iceland has declared the potential collapse of the Atlantic Meridional Overturning Circulation (AMOC) a national security concern and an existential threat. This declaration highlights the growing recognition of the severe consequences associated with the AMOC's weakening, including extreme cold in Northern Europe and increased drought in Southern Europe.

  2. New study suggests Atlantic Ocean circulation could collapse as early as 2025

    A new study published in Science Advances suggests the Atlantic Meridional Overturning Circulation (AMOC) could collapse as early as 2025. Researchers developed a new method to predict the collapse by analyzing temperature data in the South Atlantic, identifying a 'fingerprint' that indicates the AMOC is heading towards a tipping point.

January 2024 — 1 developments

  1. AMOC Closer to Tipping Point Than Previously Thought, Models Suggest

    New research utilizing advanced climate models suggests that the AMOC could be closer to a tipping point than previously understood, with potential collapse occurring as early as 2050. This study emphasizes the non-linear nature of climate system responses and the potential for abrupt changes.

January 2023 — 1 developments

  1. Modeling Studies Predict Significant AMOC Weakening This Century

    Further modeling studies indicate a significant probability of AMOC weakening or collapse this century under high greenhouse gas emission scenarios. These simulations refine previous estimates and underscore the urgency of climate mitigation efforts to prevent potentially catastrophic impacts.

January 2022 — 1 developments

  1. Paleoceanographic Study Links AMOC Stability to Past Millennia, Warns of Warming

    A paleoceanographic reconstruction suggests that the AMOC may have been in a relatively stable state for the past 10,000 years, but that current warming trends could push it towards a tipping point. This long-term perspective highlights the unprecedented nature of current climate change impacts on this critical ocean current system.

August 2021 — 1 developments

  1. Study Detects Early Warning Signals for AMOC Collapse

    A study published in *Nature Climate Change* by Niklas Boers presents observation-based early-warning signals for an AMOC collapse. While the study suggests the possibility of an imminent shutdown, other scientists caution that direct deep-ocean observations do not strongly support claims of an immediate collapse, emphasizing the need for continued direct monitoring.

January 2021 — 1 developments

  1. Early Warning Signs of AMOC Tipping Point Identified by Researchers

    Researchers identify early warning signs of a potential tipping point for the AMOC. Scientists spot these warning signs, indicating that the system may be approaching a critical threshold where a collapse could become inevitable, prompting increased scientific attention and concern.

January 2020 — 1 developments

  1. AMOC Circulation Shows No Significant Change Post-1990s, Study Finds

    A study published in *Science Advances* finds no significant change in the AMOC circulation compared to the 1990s, despite substantial changes occurring across the North Atlantic during the same period. This finding adds to the complex and sometimes contradictory picture emerging from AMOC research, indicating that direct measurements may not always align with broader climate indicators.

January 2019 — 1 developments

  1. Gulf Stream Shows Resilience Amidst AMOC Slowdown

    A study by NCEI researchers highlights the resilience of the Gulf Stream, a component of the AMOC, despite a general slowdown observed in the AMOC. This research indicates that while the overall circulation may be weakening, certain parts might exhibit more stability, adding nuance to the understanding of the system's dynamics.

January 2015 — 1 developments

  1. AMOC Weaker Than Pre-Industrial Era, Analysis Suggests

    Another statistical analysis interprets a cold pattern in temperature records as a sign of AMOC weakening. Research also suggests that as of this year, the AMOC was weaker than before the Industrial Revolution, though debate continues over the causes and extent of this weakening, highlighting ongoing scientific inquiry.

January 2010 — 1 developments

  1. Study Suggests AMOC Weakening Since 1930s with 1970s Shift

    A statistical analysis suggests that the AMOC has been weakening since the late 1930s, with an abrupt shift in a North-Atlantic overturning cell observed around 1970. This finding contributes to the growing body of evidence indicating a potential decline in the AMOC's strength over recent decades, raising early concerns about its long-term stability.

January 2004 — 1 developments

  1. AMOC Monitoring Intensifies with Direct Measurements Beginning

    Scientists begin to closely monitor the AMOC, with direct measurements of its strength becoming available from this year onwards. This period marks an increase in scientific focus on the AMOC's stability and potential weakening due to climate change. Despite early monitoring, significant uncertainties remain regarding the precise behavior and future of the circulation.