DOI: 10.1002/grl.50930
论文题名: Atmosphere drives recent interannual variability of the Atlantic meridional overturning circulation at 26.5°N
作者: Roberts C.D. ; Waters J. ; Peterson K.A. ; Palmer M.D. ; McCarthy G.D. ; Frajka-Williams E. ; Haines K. ; Lea D.J. ; Martin M.J. ; Storkey D. ; Blockley E.W. ; Zuo H.
刊名: Geophysical Research Letters
ISSN: 0094-8470
EISSN: 1944-8201
出版年: 2013
卷: 40, 期: 19 起始页码: 5164
结束页码: 5170
语种: 英语
英文关键词: AMOC
; Atlantic meridional overturning circulation
; data assimilation
; ocean circulation
; ocean model
; variability
Scopus关键词: AMOC
; Atlantic meridional overturning circulations
; Data assimilation
; Ocean circulation
; Ocean model
; variability
; Data processing
; Digital storage
; Ocean currents
; Computer simulation
; annual variation
; atmospheric forcing
; data assimilation
; Ekman transport
; meridional circulation
; overturn
; simulation
; weather forecasting
英文摘要: The Atlantic meridional overturning circulation (AMOC) has been observed at 26.5°N since 2004. During 2009/2010, there was a transient 30% weakening of the AMOC driven by anomalies in geostrophic and Ekman transports. Here, we use simulations based on the Met Office Forecast Ocean Assimilation Model (FOAM) to diagnose the relative importance of atmospheric forcings and internal ocean dynamics in driving the anomalous geostrophic circulation of 2009/2010. Data-assimilating experiments with FOAM accurately reproduce the mean strength and depth of the AMOC at 26.5°N. In addition, agreement between simulated and observed stream functions in the deep ocean is improved when we calculate the AMOC using a method that approximates the observing array at 26.5°N. The main features of the geostrophic circulation anomaly are captured by an ensemble of simulations without data assimilation. These model results suggest that the atmosphere played a dominant role in driving recent interannual variability of the AMOC. Key Points Recent interannual variability of the AMOC dominated by mid-ocean anomalies Most of this variability can be simulated as a response to atmospheric forcings Model-data agreement improved when AMOC calculated using observational method ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84884767420&doi=10.1002%2fgrl.50930&partnerID=40&md5=ed5c86d8acd5c7bce0f8eafbbb3a52be
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5734
Appears in Collections: 气候减缓与适应
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作者单位: Met Office Hadley Centre, Fitzroy Rd., Exeter, EX1 3PB, United Kingdom
Recommended Citation:
Roberts C.D.,Waters J.,Peterson K.A.,et al. Atmosphere drives recent interannual variability of the Atlantic meridional overturning circulation at 26.5°N[J]. Geophysical Research Letters,2013-01-01,40(19).