Recent scientific research carries a stark warning that should resonate across every atoll, high island, and lagoon of the Pacific: tropical forests — long trusted as the planet’s great carbon sinks — can effectively stop absorbing carbon dioxide during strong El Niño events. In some cases, they become temporary sources of greenhouse gases instead.
The study, drawing on more than three decades of measurements across half a million trees in South American tropical forests (primarily the Amazon basin and its drier edges), found that during the extreme 2015–2016 El Niño, when land temperatures rose by a degree or more and drought intensified, tree mortality soared. Growth slowed. The forests’ net carbon uptake collapsed to zero in many plots. Larger trees, in particular, suffered hydraulic failure — their internal water columns snapped under the heat and thirst.
This is not merely an Amazon story. It is a tropical story. And the tropics include us.
El Niño Has Already Arrived — and It Is Strengthening
As of mid-July 2026, a strong El Niño is underway across the equatorial Pacific. Sea surface temperatures are already running well above normal, and forecasts indicate further intensification through the remainder of the year, with a high probability of a very strong event peaking in late 2026 or early 2027. Scientists note that this El Niño began against a background of already record-warm oceans — a combination never before observed.
For the Kingdom of Boralani and our neighbours in Melanesia and Polynesia, the classic El Niño signature is clear and well-documented: reduced rainfall, longer dry spells, elevated temperatures, lower sea levels in the western Pacific, and heightened risk of drought stress on vegetation, agriculture, and freshwater lenses.
Our Forests and Blue Carbon Are Not Immune
Boralani’s modest land area is rich in exactly the ecosystems now shown to be vulnerable:
– Lowland and montane tropical rain forests on our higher islands
– Extensive coastal mangrove forests
– Seagrass meadows and coastal vegetation that form our blue-carbon systems
Mangroves in particular are among the most carbon-dense ecosystems on Earth. Per hectare they can store three to five times more carbon than many upland tropical forests, much of it locked in deep, organic-rich soils. When these systems are stressed by prolonged drought, heat, or lowered sea levels (which increase soil salinity), their ability to sequester carbon declines — and in extreme cases, stored carbon can be released.
The same mechanisms identified in the Amazon study — reduced photosynthesis as stomata close to conserve water, increased tree mortality from hydraulic failure, and multi-year recovery lags — apply to our island forests and mangroves under El Niño drought. Research from the Indo-Pacific region has already shown reduced solar-induced fluorescence (a proxy for photosynthesis), higher fire risk, and temporary shifts from sink to source during strong El Niño years.
Our forests and blue-carbon ecosystems are not vast like the Amazon. Their absolute carbon stock is small on the global scale. But for a small island kingdom, they are everything: shoreline protection against the next cyclone, nurseries for our fisheries, freshwater regulation, biodiversity, and a tangible contribution to the global carbon balance we rely upon for our own survival.
Compounding Risks for Pacific Islands
The new research arrives at a dangerous moment. Climate change is already raising baseline temperatures and increasing the frequency of extreme El Niño events. When an El Niño strikes forests that have not fully recovered from previous stress, the carbon losses compound. The article notes that edges of the Amazon have experienced some of the fastest warming in the tropics; many Pacific islands are experiencing similar rapid changes in temperature and rainfall extremes.
For Boralani this means:
1. Greater risk of dieback or reduced growth in our remaining natural forests and mangrove stands during the current El Niño.
2. Potential release of soil carbon from stressed mangroves and wetlands.
3. Stress on food gardens and agroforestry systems that communities depend upon.
4. A temporary weakening of our natural contribution to climate mitigation precisely when the world needs every tonne of carbon sequestered.
The Kingdom’s Position and Immediate Actions
The Kingdom of Boralani reaffirms its commitment to the Paris Agreement, the Rarotonga Treaty, and the Pacific’s collective climate justice agenda. We cannot control the El Niño cycle, but we can strengthen the resilience of our forests and blue-carbon systems.
Accordingly, the Ministry of Environment, Climate & Ocean Affairs, in coordination with traditional leaders and community resource managers, is directing the following immediate measures:
– Accelerated monitoring of mangrove health, forest canopy condition, and soil moisture across key sites during this El Niño.
– Temporary restrictions on any non-essential cutting or clearing in drought-stressed forest and mangrove areas.
– Expanded community-based fire prevention and early-warning protocols.
– Integration of El Niño forest-stress scenarios into our National Adaptation Plan and the Boralani 2050 low-carbon development pathway.
– Renewed diplomatic emphasis, through the Pacific Islands Forum and UNFCCC processes, on the need for developed nations to deepen emission cuts so that natural carbon sinks are not pushed beyond their adaptive limits.
We also call upon the international scientific community to expand long-term forest and mangrove monitoring networks into the Southwest Pacific. The Amazon study is invaluable; we need equivalent high-resolution data for island ecosystems if we are to protect them.
A Shared Fate
The trees of the Amazon and the mangroves of Boralani are connected through the same global carbon cycle and the same amplifying climate extremes. When tropical forests anywhere stop breathing in carbon, the entire planet — including every Pacific island — pays the price in higher temperatures, stronger storms, and rising seas.
Boralani will continue to protect every hectare of forest and mangrove we still hold. We will continue to speak for the ocean and the islands that have contributed least to the crisis yet stand first in the path of its consequences. And we will continue to remind the world that the carbon sinks of the tropics are not infinite insurance policies. They are living systems that can, and will, fail under the heat we are creating.
The current El Niño is a live experiment in that failure. We intend to learn from it, adapt to it, and insist that the world act before the next one arrives even stronger.