DOI: 10.1007/s00382-013-2004-5
Scopus记录号: 2-s2.0-84918564807
论文题名: Patterns of decadal-scale Arctic warming events in simulated climate
作者: Beitsch A. ; Jungclaus J.H. ; Zanchettin D.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2014
卷: 43, 期: 2017-07-08 起始页码: 1773
结束页码: 1789
语种: 英语
英文关键词: Arctic climate
; Coupled atmosphere–ocean–sea-ice processes
; Decadal natural climate variability
; Early twentieth century warming
; Superposed epoch analysis
英文摘要: Pronounced positive decadal-scale temperature anomalies occurred in the Arctic region in the first half of the twentieth century, an episode known as the early twentieth century warming (ETCW). Analyzing a 3,000-year unperturbed climate simulation performed with the Max Planck Institute Earth System Model, we demonstrate that internal variability of the Northern Hemisphere climate system is sufficient to reproduce warm events matching the observed ETCW. We perform a superposed epoch analysis on simulated data and identify 26 Arctic warming episodes compatible with the ETCW. The simulated events reproduce, in their ensemble average, magnitude as well as spatial and temporal extent of the observed ETCW. In individual realizations, the ETCW-like events indicate that different patterns of internally generated decadal Arctic warming are possible, including pan-Arctic warming events. We investigate the dynamics that typically lead to the simulated warming events: positive oceanic heat transport anomalies that form in the North Atlantic initialize the warming events and trigger an ocean-ice-albedo feedback in the Barents Sea region. The consequent reduction in sea-ice extent leads to enhanced multi-year surface warming through strengthened ocean heat release to the atmosphere. The oceanic heat transport anomalies reduce to pre-event levels around the year of the maximum warming. However, the warming events typically lasts for another 5–7 years until the sea-ice extent recovers to pre-event conditions. © 2013, Springer-Verlag Berlin Heidelberg. 资助项目: BMBF, Bundesministerium für Bildung und Forschung
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54645
Appears in Collections: 过去全球变化的重建
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作者单位: Max Planck Institute for Meteorology, Bundesstraße 53, Hamburg, Germany; Institute of Oceanography, University of Hamburg, Bundesstraße 53, Hamburg, Germany
Recommended Citation:
Beitsch A.,Jungclaus J.H.,Zanchettin D.. Patterns of decadal-scale Arctic warming events in simulated climate[J]. Climate Dynamics,2014-01-01,43(2017-07-08)