Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.2003730117 |
Solar geoengineering may not prevent strong warming from direct effects of CO2 on stratocumulus cloud cover | |
Tapio Schneider; Colleen M. Kaul; Kyle G. Pressel | |
2020-11-16 | |
发表期刊 | Proceedings of the National Academy of Science
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出版年 | 2020 |
英文摘要 | Discussions of countering global warming with solar geoengineering assume that warming owing to rising greenhouse-gas concentrations can be compensated by artificially reducing the amount of sunlight Earth absorbs. However, solar geoengineering may not be fail-safe to prevent global warming because CO2 can directly affect cloud cover: It reduces cloud cover by modulating the longwave radiative cooling within the atmosphere. This effect is not mitigated by solar geoengineering. Here, we use idealized high-resolution simulations of clouds to show that, even under a sustained solar geoengineering scenario with initially only modest warming, subtropical stratocumulus clouds gradually thin and may eventually break up into scattered cumulus clouds, at concentrations exceeding 1,700 parts per million (ppm). Because stratocumulus clouds cover large swaths of subtropical oceans and cool Earth by reflecting incident sunlight, their loss would trigger strong (about 5 K) global warming. Thus, the results highlight that, at least in this extreme and idealized scenario, solar geoengineering may not suffice to counter greenhouse-gas-driven global warming. |
领域 | 地球科学 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/304342 |
专题 | 地球科学 |
推荐引用方式 GB/T 7714 | Tapio Schneider,Colleen M. Kaul,Kyle G. Pressel. Solar geoengineering may not prevent strong warming from direct effects of CO2 on stratocumulus cloud cover[J]. Proceedings of the National Academy of Science,2020. |
APA | Tapio Schneider,Colleen M. Kaul,&Kyle G. Pressel.(2020).Solar geoengineering may not prevent strong warming from direct effects of CO2 on stratocumulus cloud cover.Proceedings of the National Academy of Science. |
MLA | Tapio Schneider,et al."Solar geoengineering may not prevent strong warming from direct effects of CO2 on stratocumulus cloud cover".Proceedings of the National Academy of Science (2020). |
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