globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo2225
论文题名:
Persistent link between solar activity and Greenland climate during the Last Glacial Maximum
作者: Adolphi F.; Muscheler R.; Svensson A.; Aldahan A.; Possnert G.; Beer J.; Sjolte J.; Björck S.; Matthes K.; Thiéblemont R.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2014
卷: 7, 期:9
起始页码: 662
结束页码: 666
语种: 英语
英文摘要: Changes in solar activity have previously been proposed to cause decadal- to millennial-scale fluctuations in both the modern and Holocene climates. Direct observational records of solar activity, such as sunspot numbers, exist for only the past few hundred years, so solar variability for earlier periods is typically reconstructed from measurements of cosmogenic radionuclides such as 10 Be and 14 C from ice cores and tree rings. Here we present a high-resolution 10 Be record from the ice core collected from central Greenland by the Greenland Ice Core Project (GRIP). The record spans from 22,500 to 10,000 years ago, and is based on new and compiled data. Using 14 C records to control for climate-related influences on 10 Be deposition, we reconstruct centennial changes in solar activity. We find that during the Last Glacial Maximum, solar minima correlate with more negative 18 O values of ice and are accompanied by increased snow accumulation and sea-salt input over central Greenland. We suggest that solar minima could have induced changes in the stratosphere that favour the development of high-pressure blocking systems located to the south of Greenland, as has been found in observations and model simulations for recent climate. We conclude that the mechanism behind solar forcing of regional climate change may have been similar under both modern and Last Glacial Maximum climate conditions. © 2014 Macmillan Publishers Limited. 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/106466
Appears in Collections:气候减缓与适应
科学计划与规划

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作者单位: Department of Geology, Quaternary Sciences, Lund University, 22362 Lund, Sweden; Centre for Ice and Climate, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark; Department of Earth Sciences, Uppsala University, 75236 Uppsala, Sweden; Department of Geology, United Arab Emirates University, 17551 Al Ain, United Arab Emirates; Tandem Laboratory, Uppsala University, 75120 Uppsala, Sweden; Swiss Federal Institute of Aquatic Science and Technology, Eawag, 8600 Dübendorf, Switzerland; Division of Ocean Circulation and Climate, GEOMAR Helmholtz Centre for Ocean Research Kiel, 24105 Kiel, Germany

Recommended Citation:
Adolphi F.,Muscheler R.,Svensson A.,et al. Persistent link between solar activity and Greenland climate during the Last Glacial Maximum[J]. Nature Geoscience,2014-01-01,7(9)
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