DOI: 10.1007/s00382-014-2308-0
Scopus记录号: 2-s2.0-85028129808
论文题名: The ocean’s role in the transient response of climate to abrupt greenhouse gas forcing
作者: Marshall J. ; Scott J.R. ; Armour K.C. ; Campin J.-M. ; Kelley M. ; Romanou A.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2015
卷: 44, 期: 2017-07-08 起始页码: 2287
结束页码: 2299
语种: 英语
英文关键词: Antarctic
; Arctic
; Climate change
; Climate feedbacks
; Greenhouse gas warming
; Ocean
英文摘要: We study the role of the ocean in setting the patterns and timescale of the transient response of the climate to anthropogenic greenhouse gas forcing. A novel framework is set out which involves integration of an ocean-only model in which the anthropogenic temperature signal is forced from the surface by anomalous downwelling heat fluxes and damped at a rate controlled by a ‘climate feedback’ parameter. We observe a broad correspondence between the evolution of the anthropogenic temperature ((Formula Presented.)) in our simplified ocean-only model and that of coupled climate models perturbed by a quadrupling of (Formula Presented.). This suggests that many of the mechanisms at work in fully coupled models are captured by our idealized ocean-only system. The framework allows us to probe the role of the ocean in delaying warming signals in the Southern Ocean and in the northern North Atlantic, and in amplifying the warming signal in the Arctic. By comparing active and passive temperature-like tracers we assess the degree to which changes in ocean circulation play a role in setting the distribution and evolution of (Formula Presented.). The background ocean circulation strongly influences the large-scale patterns of ocean heat uptake and storage, such that (Formula Presented.) is governed by an advection/diffusion equation and weakly damped to the atmosphere at a rate set by climate feedbacks. Where warming is sufficiently small, for example in the Southern Ocean, changes in ocean circulation play a secondary role. In other regions, most noticeably in the North Atlantic, changes in ocean circulation induced by (Formula Presented.) are central in shaping the response. © 2014, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54186
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States; Center for Global Change Science, Massachusetts Institute of Technology, Cambridge, MA, United States; Goddard Institute for Space Sciences, Columbia University, New York, NY, United States
Recommended Citation:
Marshall J.,Scott J.R.,Armour K.C.,et al. The ocean’s role in the transient response of climate to abrupt greenhouse gas forcing[J]. Climate Dynamics,2015-01-01,44(2017-07-08)