在这项工作中，研究人员提出了温度介于-10°和-24°C之间的，工业气溶胶热点区域的过冷液态水云冰川作用的观测证据。与附近液态水云相比，受冰川作用影响区域的短波反射率降低了14%，长波辐射增加了4%。云量减少了8%，云的光学厚度减少了18%。
此外，每天由冰川作用引起的降雪量达到15毫米。工业气溶胶热点下风处的冰川事件表明，人为气溶胶可能起到冰核颗粒的作用。然而，核电站下风处罕见的冰川事件表明，除气溶胶排放外，其他因素也可能在观测到的冰川事件中起作用。
附：英文原文
Title: Glaciation of liquid clouds, snowfall, and reduced cloud cover at industrial aerosol hot spots
Author: Velle Toll, Jorma Rahu, Hannes Keernik, Heido Trofimov, Tanel Voormansik, Peter Manshausen, Emma Hung, Daniel Michelson, Matthew W. Christensen, Piia Post, Heikki Junninen, Benjamin J. Murray, Ulrike Lohmann, Duncan Watson-Parris, Philip Stier, Norman Donaldson, Trude Storelvmo, Markku Kulmala, Nicolas Bellouin
Issue&Volume: 2024-11-15
Abstract: The ability of anthropogenic aerosols to freeze supercooled cloud droplets remains debated. In this work, we present observational evidence for the glaciation of supercooled liquid-water clouds at industrial aerosol hot spots at temperatures between -10° and -24°C. Compared with the nearby liquid-water clouds, shortwave reflectance was reduced by 14% and longwave radiance was increased by 4% in the glaciation-affected regions. There was an 8% reduction in cloud cover and an 18% reduction in cloud optical thickness. Additionally, daily glaciation-induced snowfall accumulations reached 15 millimeters. Glaciation events downwind of industrial aerosol hot spots indicate that anthropogenic aerosols likely serve as ice-nucleating particles. However, rare glaciation events downwind of nuclear power plants indicate that factors other than aerosol emissions may also play a role in the observed glaciation events.
DOI: adl0303
Source: https://www.science.org/doi/10.1126/science.adl0303