The Year the
Ocean Turned

Section I

The Signal in the Ocean

The first sign is always in the thermometers. Buoys and satellites drifting across the equatorial Pacific began registering it in early 2026: a patch of ocean warming faster than it should, expanding east from the warm pool near Indonesia, stretching toward the South American coast. It is a pattern that climate scientists recognise immediately — and one that, at sufficient magnitude, has historically disrupted the food supply of three billion people, pushed global temperatures to new records, and triggered droughts on four continents simultaneously.

On April 9, 2026, the National Oceanic and Atmospheric Administration published its latest El Nino forecast. The probability of El Nino conditions developing over the May-to-July window: 61 percent. The probability that the event becomes strong — formally, that sea surface temperatures in the central equatorial Pacific rise more than 1.5°C above the long-term average — sits at roughly one in three. European climate models, which have shown slightly stronger skill in recent ENSO forecasting cycles, suggest an even higher likelihood of a very strong event. Meteorologists have begun quietly using a word that appeared in serious scientific literature only twice before: super.

A super El Nino is not simply a large El Nino. It is a categorically different intervention in the global climate system — one where sea surface temperature anomalies in the Nino-3.4 region of the central Pacific reach or exceed 2°C above average, and where the downstream effects on rainfall, drought, and agricultural output extend far beyond what an ordinary warm event produces. The two confirmed super events in the instrumental record — 1997-98 and 2015-16 — each caused over $100 billion in damages, killed tens of thousands of people, and disrupted food production across Asia, Africa, and Latin America for multiple growing seasons.

The question the world's food systems and climate agencies are now confronting is not whether to prepare for a super El Nino but how rapidly to act in the window before its effects become irreversible. The planting decisions made in Ethiopia's highlands over the coming weeks, the water reservoir management strategies being set in Jakarta and Manila, the commodity hedging positions being taken in Chicago and London — all of them will be shaped by what the Pacific does between now and October.

Section II

Walker Circulation and the Engine of Disruption

To understand why a patch of warm water in the Pacific can destroy harvests in Ethiopia, you need to understand the Walker Circulation — the massive, invisible conveyor belt of air that normally governs the distribution of rain across the tropics, and that El Nino systematically dismantles.

In normal years, the trade winds blow west across the equatorial Pacific, driven by the temperature difference between the cool eastern Pacific (off the South American coast) and the warm western Pacific (near Indonesia and Australia). Warm, moist air rises over the western Pacific, dumps torrential rain across Southeast Asia and the Maritime Continent, flows east at altitude, descends as dry air over the eastern Pacific, and circles back west along the ocean surface. This loop — the Walker Circulation — is the engine of the tropical rainfall system. It keeps the Amazon wet, the Indian monsoon on schedule, and eastern Africa in moisture balance during the growing season.

A "strong" El Nino, classified when the Nino-3.4 sea surface temperature anomaly exceeds 1.5°C for five consecutive three-month averages, represents a near-total reorganisation of tropical circulation. A "super" event at 2°C or above is, in effect, the same system running at roughly double the intensity. The rainfall that would normally fall on the rice paddies of Vietnam and the maize fields of southern Ethiopia instead falls into the already-wet eastern Pacific. The droughts that follow are not brief dry spells — they are multi-season collapses in moisture that can persist long after the El Nino has peaked and dissipated.

The 2015-16 event, which peaked at approximately 2.6°C and remains the strongest reliably measured El Nino in the satellite record, triggered El Nino-related drought across parts of southern Africa, Ethiopia, southeastern Asia, and the Pacific islands simultaneously, and contributed to a food security emergency affecting over 60 million people. Cocoa production in Ghana fell sharply. Hydroelectric output in parts of Southeast Asia collapsed as reservoirs dried. Coffee yields in Vietnam and Ethiopia declined for two consecutive seasons. The 2026 event has not yet matched that intensity. But it is developing in a warmer baseline ocean, during a period when global food system buffers — strategic grain reserves, supply chain redundancy — are already strained from the cascading disruptions of the previous decade.

Section III

What Burns, What Drowns, What Doesn't Grow

The global food system is not uniformly vulnerable to El Nino. Its exposure is concentrated in a handful of critical commodities and specific geographies — and 2026's combination of warming baseline and potential super event creates the most dangerous overlap of those vulnerabilities in a generation.

Rice is the crop most acutely at risk. Roughly 90 percent of the world's rice is grown and consumed in Asia — predominantly in India, China, Indonesia, Bangladesh, Vietnam, and Thailand — and the monsoon systems that water it are precisely the systems that El Nino disrupts. During the strong El Nino of 2015-16, the Indian monsoon arrived late and delivered below-normal rainfall across large areas of the subcontinent. Vietnam's Mekong Delta, which produces a third of the country's rice, experienced saltwater intrusion as river flows dropped. In Indonesia — the world's third-largest rice producer — drought stress reduced yields across multiple provinces. A super event in 2026 threatens the same pattern, but on a planet where 300 million more people depend on Asian rice production than did in 2015.

Cocoa is exposed through a different mechanism. The world's cocoa comes overwhelmingly from two countries: Ivory Coast and Ghana, which together account for roughly 60 percent of global supply. Both sit in West Africa's humid belt, where rainfall is carefully calibrated for the cocoa tree's requirements. El Nino suppresses West African rainfall during the critical growing period, stressing trees that are already weakened by disease and soil depletion. The 2015-16 event reduced cocoa yields in Ghana significantly, contributing to a price spike that presaged the chocolate shortages of 2023-24. A super event in 2026 would hit plantations that have not fully recovered.

Coffee faces compound pressure. Ethiopia — the crop's birthplace and Africa's largest producer — is specifically flagged in European Union early warning assessments as facing acute drought risk during the 2026 agricultural season, alongside South Sudan and Sudan. Vietnam, the world's second-largest coffee producer and dominant supplier of the robusta variety used in espresso blends, faces similar monsoon disruption. Colombia, a significant arabica producer, sits on the Pacific coast and typically sees excessive rainfall during El Nino years — too much water at the wrong time can be as damaging as drought, triggering fungal disease and fruit drop.

Sugar production, concentrated in Brazil, India, and Thailand, faces mixed impacts. Brazil's center-south sugarcane belt typically sees enhanced rainfall during El Nino years — a potential benefit for yields. But Thailand, the world's fourth-largest sugar exporter, faces drought stress, and Indian production variability adds uncertainty to global supply chains. The net effect is volatile commodity pricing rather than a clear directional shortage.

The compounding factor in 2026 that did not exist in prior super events is the interaction with a food system still absorbing the distributional shocks of recent years. Global grain reserves as a percentage of consumption are at multi-decade lows. The commodity price spikes of 2022 reduced the purchasing power of import-dependent nations across sub-Saharan Africa and South and Southeast Asia. Any significant production shortfall in rice, cocoa, or coffee in 2026 will enter markets with almost no buffer.

Section IV

The Temperature Record and the 2°C Threshold

Beyond food, El Nino carries a second consequence that climate scientists are watching with particular attention in 2026: its interaction with long-term warming to push global average temperatures to levels never recorded in human history.

Global mean surface temperature is already running at approximately 1.3°C above the preindustrial baseline. The Paris Agreement established 1.5°C as the threshold above which climate risks escalate sharply, and 2.0°C as the level associated with severe and potentially irreversible consequences for ecosystems and human systems. El Nino events add a temporary "pulse" of warming on top of the underlying trend — the 2015-16 super event contributed approximately 0.2°C to global average temperature during its peak, which is why 2016 and 2023 successively set the record for hottest calendar year in the instrumental record.

The interaction between El Nino and another major ocean system warrants attention here. Research published in April 2026 in the journal Science Advances found that the Atlantic Meridional Overturning Circulation — the ocean conveyor belt that regulates temperatures across Europe and the North Atlantic — could slow by 51 percent by 2100, a significantly worse projection than previous estimates. AMOC slowdown does not directly cause El Nino, but both systems interact through atmospheric teleconnections that are not yet fully characterised. A weakened AMOC changes the temperature gradient of the North Atlantic, which influences the Intertropical Convergence Zone, which in turn affects how El Nino's heat pulses propagate through the global atmosphere. The full picture of how multiple climate systems in simultaneous stress interact is among the most important and least resolved questions in current climate science. The article AMOC on the Brink examines the current data in detail.

What does a potential super El Nino mean for the Paris targets? In the strict technical sense, a temporary temperature exceedance above 1.5°C or even 2.0°C does not constitute a "breach" of Paris — the agreement refers to long-term average warming, not any single year. But brief exceedances matter for a different reason: they demonstrate that the system is already close enough to these thresholds that weather variability alone can push us across them. El Nino does not determine the long-term trajectory of warming. It reveals, with uncomfortable precision, where that trajectory already is.

The preparation window is real and finite. The NOAA forecast issued on April 9, 2026, gives governments, food agencies, farmers, and markets several months of advance signal before the peak of any potential super event in late 2026 or early 2027. What that signal demands is not panic but precision: drought-resistant crop variety distribution in Ethiopia and East Africa; water management measures in Vietnam and India before the monsoon season; commodity reserve building in import-dependent nations; and, at the institutional level, the kind of pre-positioned humanitarian capacity that historically only arrives after the emergency is already underway. The Pacific has given the world a warning. The question is whether the world chooses to hear it.