近日，美国加州理工学院Chad A. Greene团队研究了地球冰川和冰盖的季节性动态。2025年11月27日出版的《科学》杂志发表了这项成果。
地球冰川对环境变化的敏感性每年都会显现，它们会随着季节变化而改变流速。冰川从冬季到夏季对变暖的响应，可能有助于预测其在多年时间尺度上对变暖的响应。
研究组对全球冰川和冰盖的季节性动态进行了分析，发现当年最大表面温度超过0°C时，季节流速幅度最大。研究组观察到基础水文系统在季节尺度上影响冰川流动的证据，并发现季节性与年际流速变化之间存在微弱但显著的全球相关性。冰川似乎每年都会因地表融化而加速或减速，数据表明未来大气变暖可能会放大并改变全球季节性冰川动态的时间规律。
附：英文原文
Title: Seasonal dynamics of Earth’s glaciers and ice sheets
Author: Chad A. Greene, Alex S. Gardner
Issue&Volume: 2025-11-27
Abstract: The sensitivity of Earth’s glaciers to environmental change is on display each year as they change speed with the seasons, and a glacier’s response to warming from winter to summer may help predict its response to warming on multiyear timescales. We present a global analysis of seasonal glacier and ice sheet dynamics, finding that seasonal velocity amplitudes are greatest where annual maximum surface temperature exceeds 0°C. We see evidence of basal hydrological systems affecting glacier flow on seasonal timescales and find a weak but significant global correlation between seasonal and interannual flow variability. Glaciers appear to accelerate and decelerate yearly in response to surface melt, and the data suggest that future atmospheric warming could amplify and alter the timing of seasonal glacier dynamics worldwide.
DOI: adx6654