气候变化领域集成服务门户(CCPortal): Earth’s radiative imbalance from the Last Glacial Maximum to the present

CCPortal

DOI	10.1073/pnas.1905447116
	Earth’s radiative imbalance from the Last Glacial Maximum to the present
	Baggenstos D.; Häberli M.; Schmitt J.; Shackleton S.A.; Birner B.; Severinghaus J.P.; Kellerhals T.; Fischer H.
发表日期	2019
ISSN	0027-8424
起始页码	14881
结束页码	14886
卷号	116 期号:30
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.
英文关键词	Deglaciation; Energy budget; Ice cores; Noble gases; Paleoclimate
语种	英语
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
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158863
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 Env...
推荐引用方式 GB/T 7714	Baggenstos D.,Häberli M.,Schmitt J.,等. Earth’s radiative imbalance from the Last Glacial Maximum to the present[J],2019,116(30).
APA	Baggenstos D..,Häberli M..,Schmitt J..,Shackleton S.A..,Birner B..,...&Fischer H..(2019).Earth’s radiative imbalance from the Last Glacial Maximum to the present.Proceedings of the National Academy of Sciences of the United States of America,116(30).
MLA	Baggenstos D.,et al."Earth’s radiative imbalance from the Last Glacial Maximum to the present".Proceedings of the National Academy of Sciences of the United States of America 116.30(2019).