When exactly will Puncak Jaya’s glaciers disappear completely?
If you’ve seen recent headlines about Indonesia’s last glaciers, the natural next question is: when, exactly, will they be gone? There isn’t one confirmed date — but two separate estimates give a pretty narrow window.
The two timelines scientists are using
- The Business Standard reports the glaciers face disappearance within roughly one to two years.
- Human Rights Monitor, citing the World Meteorological Organisation, gives a more specific window: late 2026 or early 2027.
Both point to the same general timeframe — the next one to two years — but neither is a fixed, guaranteed date. They’re estimates from different sources, not an official countdown.
Why isn’t there just one date?
Glacier loss isn’t a single event with a scheduled end point. It’s a gradual retreat that different researchers and organizations measure and project differently, based on the data and methodology available to them at the time. That’s why one source frames it as a range (“one to two years”) while another names a more specific season.
What’s driving how fast this is happening
The retreat is being driven by human-caused warming, which increasingly causes rain to fall in places where snow used to fall and accumulate as ice. El Niño conditions have made this worse in recent years. The scale of the loss so far shows how far along the process already is: glacier coverage has dropped from roughly 1,900 hectares in the 19th century to about 16 hectares today, with drone mapping showing a 95% shrinkage just between the early 2000s and 2025. Human Rights Monitor separately estimates more than 99% of the ice has been lost since around 1850.
What to keep in mind
Neither estimate should be read as a fixed deadline — treat “one to two years” and “late 2026 or early 2027” as the current best guesses, not a locked-in date. Given how active this story is, it’s worth checking for updated statements from the World Meteorological Organisation or new reporting before assuming the ice is already gone or that it will definitely last through a specific month.
Why is Carstensz now Oceania’s highest peak instead of Ngga Pulu?
For a long time, Ngga Pulu — not Carstensz Pyramid — held the title of Oceania’s highest peak. That’s no longer the case, and the reason comes down to ice, not rock.
What changed
Ngga Pulu has completely lost its ice cap. Once that ice was gone, the peak’s exposed surface sat lower than Carstensz’s summit, which shifted the region’s ranking: Carstensz is now considered the highest point in Oceania, a title Ngga Pulu previously held.
Why losing the ice mattered for the ranking
Ngga Pulu’s earlier height included the ice sitting on top of it. Carstensz, by contrast, is a rocky peak whose elevation doesn’t depend on an ice cap. So when the same warming trend that’s erasing Puncak Jaya’s other glaciers stripped Ngga Pulu’s ice away entirely, Ngga Pulu’s remaining surface no longer reached Carstensz’s height — and the “highest peak” title passed to Carstensz.
Part of a larger retreat
This isn’t an isolated event at Ngga Pulu. It reflects the same warming — rain falling where snow once fell, worsened by El Niño — that has shrunk Puncak Jaya’s glacier coverage overall from about 1,900 hectares in the 19th century to roughly 16 hectares today, a loss drone mapping shows accelerated sharply (95% shrinkage) between the early 2000s and 2025.
The takeaway
Ngga Pulu’s drop below Carstensz is a concrete, already-happened example of how glacier loss is physically reshaping the region’s geography — not a future risk, but a change that’s already reflected in how Oceania’s highest point is identified today.
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