The Global Warming Potential of Geoengineering via Radiative Cooling

IF 6.5 3区 材料科学 Q2 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY
Atousa Pirvaram, Siu Ning Leung, Paul G. O'Brien
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引用次数: 0

Abstract

This paper analyzes the potential to mitigate global warming using radiative cooling (RC) surfaces on a large scale. The study evaluates the net cooling power, radiative forcing (RF), and global warming potential of different RC materials compared to conventional construction and roofing materials, Earth's natural surfaces, and some reference cases. Key parameters for evaluating the above-mentioned structures include their solar reflectance (albedo) and long-wavelength infrared emissivity. Results show the cooling power that can be achieved by an ideal RC material with a solar reflectance of 100% and long-wave infrared emissivity of 100% is 164.8 W·m−2. In practice, materials exhibiting a cooling power as high as 160.8 W·m−2 are fabricated. Further analysis shows if 1% of Earth's surface are to be covered with this material the terrestrial RF will decrease by 1.61 W·m−2 (from 0.6 to −1.01 W·m−2). The results demonstrate that RC materials with high solar reflectivity and emissivity offer substantial cooling benefits and can reduce RF when implemented on large scales. The findings underscore the effectiveness of RC materials in reducing global warming and provide a valuable perspective on their role in reducing the environmental impacts of the built environment.

通过辐射冷却的地球工程的全球变暖潜力
本文分析了在大尺度上利用辐射冷却(RC)表面来减缓全球变暖的潜力。该研究评估了不同RC材料的净冷却功率、辐射强迫(RF)和全球变暖潜势,并与传统建筑和屋顶材料、地球自然表面和一些参考案例进行了比较。评价上述结构的关键参数包括其太阳反射率(反照率)和长波红外发射率。结果表明,理想的太阳反射率为100%,长波红外发射率为100%的RC材料可获得的冷却功率为164.8 W·m−2。实际上,材料的冷却功率高达160.8 W·m−2。进一步的分析表明,如果地球表面的1%被这种材料覆盖,地面射频将减少1.61 W·m - 2(从0.6到- 1.01 W·m - 2)。结果表明,具有高太阳反射率和发射率的RC材料提供了实质性的冷却效益,并且在大规模应用时可以减少RF。研究结果强调了RC材料在减少全球变暖方面的有效性,并为其在减少建筑环境对环境的影响方面的作用提供了有价值的视角。
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来源期刊
Advanced Sustainable Systems
Advanced Sustainable Systems Environmental Science-General Environmental Science
CiteScore
10.80
自引率
4.20%
发文量
186
期刊介绍: Advanced Sustainable Systems, a part of the esteemed Advanced portfolio, serves as an interdisciplinary sustainability science journal. It focuses on impactful research in the advancement of sustainable, efficient, and less wasteful systems and technologies. Aligned with the UN's Sustainable Development Goals, the journal bridges knowledge gaps between fundamental research, implementation, and policy-making. Covering diverse topics such as climate change, food sustainability, environmental science, renewable energy, water, urban development, and socio-economic challenges, it contributes to the understanding and promotion of sustainable systems.
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