globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo2557
论文题名:
Multiple causes of the Younger Dryas cold period
作者: Renssen H.; Mairesse A.; Goosse H.; Mathiot P.; Heiri O.; Roche D.M.; Nisancioglu K.H.; Valdes P.J.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2015
卷: 8, 期:12
起始页码: 946
结束页码: 949
语种: 英语
Scopus关键词: climate variation ; last deglaciation ; meltwater ; paleoclimate ; perturbation ; radiative forcing ; thermohaline circulation ; Younger Dryas ; Atlantic Ocean ; Atlantic Ocean (North)
英文摘要: The Younger Dryas cooling event disrupted the overall warming trend in the North Atlantic region during the last deglaciation. Climate change during the Younger Dryas was abrupt, and thus provides insights into the sensitivity of the climate system to perturbations. The sudden Younger Dryas cooling has traditionally been attributed to a shutdown of the Atlantic Meridional Overturning Circulation by meltwater discharges. However, alternative explanations such as strong negative radiative forcing and a shift in atmospheric circulation have also been offered. Here we investigate the importance of these different forcings in coupled climate model experiments constrained by data assimilation. We find that the Younger Dryas climate signal as registered in proxy evidence is best simulated using a combination of processes: a weakened Atlantic Meridional Overturning Circulation, moderate negative radiative forcing and an altered atmospheric circulation. We conclude that none of the individual mechanisms alone provide a plausible explanation for the Younger Dryas cold period. We suggest that the triggers for abrupt climate changes such as the Younger Dryas are more complex than suggested so far, and that studies on the response of the climate system to perturbations should account for this complexity. © 2015 Macmillan Publishers Limited.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106129
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 Earth Sciences, VU University Amsterdam, Amsterdam, Netherlands; Earth and Life Institute, Georges Lemaître Centre for Earth and Climate Research, Université Catholique de Louvain, Louvain-la-Neuve, Belgium; British Antarctic Survey, Natural Environment Research Council, Cambridge, United Kingdom; Institute of Plant Sciences, Oeschger Centre for Climate Change Research, University of Bern, Bern, Switzerland; Laboratoire des Sciences du Climat et de l'Environnement, INSU, UVSQ, Gif-sur-Yvette-Cedex, France; Department of Earth Sciences, University of Bergen, Bjerknes Centre for Climate Research, Bergen, Norway; School of Geographical Sciences, University of Bristol, Bristol, United Kingdom

Recommended Citation:
Renssen H.,Mairesse A.,Goosse H.,et al. Multiple causes of the Younger Dryas cold period[J]. Nature Geoscience,2015-01-01,8(12)
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