Mount Everest human activity contributes to glacier melting

A study published in the journal Regional Environmental Change indicates that human activity at Mount Everest's base camp is contributing to glacier melting through unexpected thermal sources. Researchers found that the heat transferred from human urine, which is excreted directly onto the Khumbu Glacier, could theoretically melt approximately 154 tonnes of ice and snow during a single climbing season.

Due to the high risk of dehydration at high altitudes, climbers, guides, and support teams consume large quantities of water. During the spring 2023 season, it was estimated that over 6,000 liters of urine were produced daily at the base camp. Because much of this liquid is discharged directly onto the ice rather than being collected and removed, the temperature difference between the urine (near 37°C) and the glacier surface (frequently below 0°C) creates a significant thermal impact.

When combining the heat from urine with the energy produced by fuels used at the camp—including liquefied gas, kerosene, and gasoline—scientists estimate the total human-induced thermal footprint could melt up to 2,492 tonnes of ice and snow. While these findings highlight a localized issue, researchers emphasized that climate change remains the primary driver of glacier retreat on Mount Everest.