DOI: 10.1002/2015GL065974
论文题名: The role of the ocean mixed layer on the development of the North Atlantic Oscillation: A dynamical system's perspective
作者: Vannitsem S.
刊名: Geophysical Research Letters
ISSN: 0094-9512
EISSN: 1944-9243
出版年: 2015
卷: 42, 期: 20 起始页码: 8615
结束页码: 8623
语种: 英语
英文关键词: low-frequency variability
; low-order model
; ocean mixed layer
Scopus关键词: Atmospheric pressure
; Dynamical systems
; Chaotic background
; Low frequency variability
; Low order models
; North Atlantic oscillations
; Ocean mixed layers
; Ocean-atmosphere models
; Seasonal dependence
; Seasonal variation
; Oceanography
; atmosphere-ocean coupling
; chaotic dynamics
; decadal variation
; frequency analysis
; mixed layer
; North Atlantic Oscillation
; seasonal variation
; solar radiation
; wind stress
英文摘要: The development of the low-frequency variability (LFV) in the atmosphere at multidecadal timescales is investigated in the context of a low-order coupled ocean-atmosphere model designed to emulate the interaction between the ocean mixed layer (OML) and the atmosphere at midlatitudes, both subject to seasonal variations of the Sun's radiative input. When no seasonal dependences are present, a LFV is emerging from the chaotic background for sufficiently large wind stress forcing (WSF). The period of this LFV is strongly controlled by the depth of the OML, with a shorter period for a deeper layer. In the seasonally dependent case, a similar LFV is developing that persists throughout the year. Remarkably, the emergence of this LFV occurs for smaller values of the WSF coefficient and is strongly related to the small thickness of the OML in summer, i.e., large impact of the WSF. Potential implications for real-world dynamics are discussed. Key Points The low-frequency variability at decadal timescales is robust in the presence of a seasonal cycle The summer ocean mixed layer depth plays a key role in the emergence of the LFV The mean depth of the ocean mixed layer controls the period of the low-frequency variability © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84946605876&doi=10.1002%2f2015GL065974&partnerID=40&md5=9c65bda360b18cc7b5048dccde6714b0
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9127
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: Institut Royal Météorologique de Belgique, Brussels, Belgium
Recommended Citation:
Vannitsem S.. The role of the ocean mixed layer on the development of the North Atlantic Oscillation: A dynamical system's perspective[J]. Geophysical Research Letters,2015-01-01,42(20).