DOI: 10.1002/2014GL062741
论文题名: Internally generated decadal cold events in the northern North Atlantic and their possible implications for the demise of the Norse settlements in Greenland
作者: Moreno-Chamarro E. ; Zanchettin D. ; Lohmann K. ; Jungclaus J.H.
刊名: Geophysical Research Letters
ISSN: 0094-9006
EISSN: 1944-8737
出版年: 2015
卷: 42, 期: 3 起始页码: 908
结束页码: 915
语种: 英语
英文关键词: decadal cold events
; internal climate variability
; last millennium
; Norse settlements
; subpolar gyre
; subpolar North Atlantic
Scopus关键词: Climate change
; Climatology
; Decadal cold events
; Internal climate variability
; Last millenniums
; Norse settlements
; Subpolar gyres
; Subpolar North Atlantic
; Oceanography
; advection
; climate variation
; decadal variation
; gyre
; overturn
; paleoclimate
; proxy climate record
; Arctic
; Atlantic Ocean
; Atlantic Ocean (North)
; Greenland
英文摘要: We attribute and describe the governing mechanisms of decadal cold excursions in the subpolar North Atlantic of similar amplitude and duration to cold events reconstructed from climate-proxies during the last millennium detected in an ensemble of three transient and one unperturbed climate simulation. The cold events are attributed to internal regional climate variability, with varying external forcing increasing their magnitude and frequency. The underlying general mechanism consists of a feedback loop initiated by a weakening of the North Atlantic subpolar gyre, which induces persistent colder and fresher surface conditions in the Labrador Sea and, eventually, a deep convection shutdown. We thus exclude a hemispheric climate reorganization or a weak ocean overturning circulation as necessary trigger for such events. An associated northeastward atmospheric cold advection over the Labrador Sea deteriorates local living conditions on south Greenland, essential for the sustainability of the Norse settlements. © 2015 The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84925099450&doi=10.1002%2f2014GL062741&partnerID=40&md5=5a8ea7adc8e6c509e5b91871253862ce
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8622
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Max Planck Institute for Meteorology, Hamburg, Germany
Recommended Citation:
Moreno-Chamarro E.,Zanchettin D.,Lohmann K.,et al. Internally generated decadal cold events in the northern North Atlantic and their possible implications for the demise of the Norse settlements in Greenland[J]. Geophysical Research Letters,2015-01-01,42(3).