globalchange  > 气候变化与战略
DOI: 10.1073/pnas.1905447116
论文题名:
Earth’s radiative imbalance from the Last Glacial Maximum to the present
作者: Baggenstos D.; Häberli M.; Schmitt J.; Shackleton S.A.; Birner B.; Severinghaus J.P.; Kellerhals T.; Fischer H.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2019
卷: 116, 期:30
起始页码: 14881
结束页码: 14886
语种: 英语
英文关键词: Deglaciation ; Energy budget ; Ice cores ; Noble gases ; Paleoclimate
Scopus关键词: Article ; astronomy ; deglaciation ; evolution ; ice core record ; last glacial maximum ; measurement ; priority journal ; quantitative analysis ; radiation ; sea ; sea level ; seasonal variation ; temperature
英文摘要: The energy imbalance at the top of the atmosphere determines the temporal evolution of the global climate, and vice versa changes in the climate system can alter the planetary energy fluxes. This interplay is fundamental to our understanding of Earth’s heat budget and the climate system. However, even today, the direct measurement of global radiative fluxes is difficult, such that most assessments are based on changes in the total energy content of the climate system. We apply the same approach to estimate the long-term evolution of Earth’s radiative imbalance in the past. New measurements of noble gas-derived mean ocean temperature from the European Project for Ice Coring in Antarctica Dome C ice core covering the last 40,000 y, combined with recent results from the West Antarctic Ice Sheet Divide ice core and the sea-level record, allow us to quantitatively reconstruct the history of the climate system energy budget. The temporal derivative of this quantity must be equal to the planetary radiative imbalance. During the deglaciation, a positive imbalance of typically +0.2 W·m−2 is maintained for ∼10,000 y, however, with two distinct peaks that reach up to 0.4 W·m−2 during times of substantially reduced Atlantic Meridional Overturning Circulation. We conclude that these peaks are related to net changes in ocean heat uptake, likely due to rapid changes in North Atlantic deep-water formation and their impact on the global radiative balance, while changes in cloud coverage, albeit uncertain, may also factor into the picture. © 2019 National Academy of Sciences. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163546
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作者单位: Baggenstos, D., Climate and Environmental Physics, Physics Institute, University of Bern, Bern, 3012, Switzerland, Oeschger Centre for Climate Change Research, University of Bern, Bern, 3012, Switzerland; Häberli, M., Climate and Environmental Physics, Physics Institute, University of Bern, Bern, 3012, Switzerland, Oeschger Centre for Climate Change Research, University of Bern, Bern, 3012, Switzerland; Schmitt, J., Climate and Environmental Physics, Physics Institute, University of Bern, Bern, 3012, Switzerland, Oeschger Centre for Climate Change Research, University of Bern, Bern, 3012, Switzerland; Shackleton, S.A., Scripps Institution of Oceanography, University of California San Diego, San Diego, CA 92093, United States; Birner, B., Scripps Institution of Oceanography, University of California San Diego, San Diego, CA 92093, United States; Severinghaus, J.P., Scripps Institution of Oceanography, University of California San Diego, San Diego, CA 92093, United States; Kellerhals, T., Climate and Environmental Physics, Physics Institute, University of Bern, Bern, 3012, Switzerland, Oeschger Centre for Climate Change Research, University of Bern, Bern, 3012, Switzerland; Fischer, H., Climate and Environmental Physics, Physics Institute, University of Bern, Bern, 3012, Switzerland, Oeschger Centre for Climate Change Research, University of Bern, Bern, 3012, Switzerland

Recommended Citation:
Baggenstos D.,Häberli M.,Schmitt J.,et al. Earth’s radiative imbalance from the Last Glacial Maximum to the present[J]. Proceedings of the National Academy of Sciences of the United States of America,2019-01-01,116(30)
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