Global audiences are captivated by climbers pushing themselves to the limits in the hypoxic environment of Mount Everest. However, air pressure sets oxygen abundance, meaning it varies with the weather and climate warming. This presents safety issues for mountaineers but also an opportunity for public engagement around climate change. Here we blend new observations from Everest with ERA5 reanalysis (1979-2019) and climate model results to address both perspectives. We find that plausible warming could generate subtle but physiologically relevant changes in summit oxygen availability, including an almost 5% increase in annual minimum VO₂ max for 2°C warming since pre-industrial. In the current climate we find evidence of swings in pressure sufficient to change Everest's apparent elevation by almost 750 m. Winter pressures can also plunge lower than previously reported, highlighting the importance of air pressure forecasts for the safety of those trying to push the physiological frontier on Mt. Everest.

攀登者将自己推向极限，在珠穆朗玛峰的低氧环境中吸引了全球观众。但是，气压会设置氧气的丰度，这意味着氧气会随着天气和气候变暖而变化。这给登山者带来了安全问题，也为围绕气候变化的公众参与提供了机会。在这里，我们将珠穆朗玛峰的新观测结果与ERA5重新分析（1979-2019年）和气候模型结果进行了融合，以解决这两种观点。我们发现，合理的变暖可能会在顶峰氧气供应量方面产生微妙但与生理相关的变化，包括每年最低VO ₂升高近5％。工业化以来的最高温度为2°C。在当前的气候下，我们发现压力波动足以使珠穆朗玛峰的视在海拔升高近750 m。冬季压力也可能比以前报道的要低，这突显了气压预报对于那些试图将生理边界推向山顶的人的安全的重要性。珠穆朗玛峰。