globalchange  > 气候变化事实与影响
DOI: 10.1175/JCLI-D-12-00670.1
Scopus记录号: 2-s2.0-84977533722
论文题名:
Climate signals in the mid- to high-latitude north atlantic from altimeter observations
作者: Lia F.; Job Y.-H.; Yan X.-H.; Timothy Liu W.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期:13
起始页码: 4905
结束页码: 4925
语种: 英语
Scopus关键词: Climate change ; Glacial geology ; Heat flux ; Ocean currents ; Sea level ; Surface waters ; Time measurement ; Climate variability ; Geographic location ; North Atlantic Ocean ; Ocean circulation ; Oceanic variabilities ; Variability ; Oceanography ; altimeter ; climate variation ; latitude ; oceanic circulation ; remote sensing ; sea level change ; sea surface height ; Atlantic Ocean ; Atlantic Ocean (North) ; Gulf Stream
英文摘要: The variability of the sea surface height anomaly (SSHA) in the mid- to high-latitude North Atlantic for the period of 1993-2010 was investigated using the ensemble empirical mode decomposition to identify the dominant time scales. Sea level variations in the North Atlantic subpolar gyre (SPG) are dominated by the annual cycle and the long-term increasing trend. In comparison, the SSHA along the Gulf Stream (GS) is dominated by variability at intraseasonal and annual time scales. Moreover, the sea level rise in the SPG developed at a reduced rate in the 2000s compared to rates in the 1990s, which was accompanied by a rebound in SSHA variability following a period of lower variability in the system. These changes in both apparent trend and low-frequency SSHA oscillations reveal the importance of low-frequency variability in the SPG. To identify the possible contributing factors for these changes, the heat content balance (equivalent variations in the sea level) in the subpolar region was examined. The results indicate that horizontal circulations may primarily contribute to the interannual to decadal variations, while the air-sea heat flux is not negligible at annual time scale. Furthermore, the low-frequency variability in the SPG relates to the propagation of Atlantic meridional overturning circulation (AMOC) variations from the deep-water formation region to midlatitudes in the North Atlantic, which might have the implications for recent global surface warming hiatus. © 2016 American Meteorological Society.
资助项目: EPSCoR, Office of Experimental Program to Stimulate Competitive Research ; NASA, National Aeronautics and Space Administration ; NOAA, National Oceanic and Atmospheric Administration
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50351
Appears in Collections:气候变化事实与影响

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作者单位: College of Earth, Ocean and Environment, University of Delaware, Newark, DE, United States; University of Delaware-Xiamen University Joint, Institute of Coastal Research and Management, Newark, DE, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Division of Earth and Ocean Sciences, Nicholas School of the Environment, Duke University, Durham, NC, United States; Department of Oceanography, Pusan National University, Busan, South Korea

Recommended Citation:
Lia F.,Job Y.-H.,Yan X.-H.,et al. Climate signals in the mid- to high-latitude north atlantic from altimeter observations[J]. Journal of Climate,2016-01-01,29(13)
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