The mountains of Papua, located in Indonesia near the equator, have been covered with glacial ice for centuries that Indigenous communities consider spiritually significant. The Sudirman Range once featured snow and permanent ice across all four of its major peaks a century ago, but glacier coverage has contracted dramatically from approximately 1,900 hectares in the 19th century to roughly 16 hectares currently. Scientists anticipate the remaining ice around Puncak Jaya, also known as Carstensz Pyramid, will vanish entirely within the next year or two, with glaciated areas experiencing a 95% decline from the early 2000s to 2025.
The glacial retreat is driven by atmospheric warming caused by human activities including fossil fuel combustion, according to glacier ecologist Marie Šabacká. The region’s proximity to the equator means glaciers can only persist at very high altitudes within narrow climatic parameters, making them particularly vulnerable to temperature increases. As warming raises the freezing point on mountains, more precipitation falls as rain rather than snow. Local factors including cloud cover and topography influence the pace of decline, while El Niño events can accelerate the process. Researchers are working urgently to document remaining ice before it disappears, recognizing the glaciers as important climate history archives through ice cores that preserve atmospheric records.
At least five Indigenous groups maintain deep spiritual connections to Puncak Jaya. The Amungme people call the range Nemangkawi, meaning the “White Arrow,” viewing it as a symbol of honesty, purity and moral integrity that traditionally guided how people should live. The Moni people refer to the mountain as Mbainggela and believe their ancestors watch over it. Local activists describe the glacier’s disappearance as equivalent to the destruction of sacred religious sites like Mecca or the Vatican, representing a loss of cultural foundations and ancestral connection.
The glacier’s decline occurs alongside broader landscape transformations in the region. Extensive copper and gold deposits discovered during the 20th century led to large-scale mining operations, including the Grasberg mine operated by Freeport, one of the world’s largest gold and copper producers. Mining activities have excavated mountain faces and constructed industrial infrastructure, bringing economic opportunities and development alongside environmental degradation and social conflict. Indigenous communities have experienced job creation and improved access to roads and education, but some have lost access to ancestral lands as extraction expanded. The convergence of climate-driven ice loss and industrial development has intensified concerns among local populations about the transformation of sacred landscapes.
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