DOI: 10.5194/cp-10-2201-2014
Scopus记录号: 2-s2.0-84918589268
论文题名: Enhanced 20th-century heat transfer to the Arctic simulated in the context of climate variations over the last millennium
作者: Jungclaus J.H. ; Lohmann K. ; Zanchettin D.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2014
卷: 10, 期: 6 起始页码: 2201
结束页码: 2213
语种: 英语
Scopus关键词: air-sea interaction
; atmospheric forcing
; climate variation
; global warming
; heat transfer
; numerical model
; oceanic circulation
; paleoceanography
; paleoclimate
; Arctic
; Atlantic Ocean
; Fram Strait
英文摘要: Oceanic heat transport variations, carried by the northward-flowing Atlantic Water, strongly influence Arctic sea-ice distribution, ocean-atmosphere exchanges, and pan-Arctic temperatures. Palaeoceanographic reconstructions from marine sediments near Fram Strait have documented a dramatic increase in Atlantic Water temperatures over the 20th century, unprecedented in the last millennium. Here we present results from Earth system model simulations that reproduce and explain the reconstructed exceptional Atlantic Water warming in Fram Strait in the 20th century in the context of natural variability during the last millennium. The associated increase in ocean heat transfer to the Arctic can be traced back to changes in the ocean circulation in the subpolar North Atlantic. An interplay between a weakening overturning circulation and a strengthening subpolar gyre as a consequence of 20th-century global warming is identified as the driving mechanism for the pronounced warming along the Atlantic Water path toward the Arctic. Simulations covering the late Holocene provide a reference frame that allows us to conclude that the changes during the last century are unprecedented in the last 1150 years and that they cannot be explained by internal variability or natural forcing alone. © Author(s) 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49196
Appears in Collections: 气候变化与战略
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Recommended Citation:
Jungclaus J.H.,Lohmann K.,Zanchettin D.. Enhanced 20th-century heat transfer to the Arctic simulated in the context of climate variations over the last millennium[J]. Climate of the Past,2014-01-01,10(6)