DOI: 10.1002/2013GL058636
论文题名: On the long-term stability of Gulf Stream transport based on 20 years of direct measurements
作者: Rossby T. ; Flagg C.N. ; Donohue K. ; Sanchez-Franks A. ; Lillibridge J.
刊名: Geophysical Research Letters
ISSN: 0094-10524
EISSN: 1944-10255
出版年: 2014
卷: 41, 期: 1 起始页码: 114
结束页码: 120
语种: 英语
英文关键词: ADCP
; Gulf Stream transport
; interannual variability
; long-term trend
; repeat measurement
Scopus关键词: Accelerated sea-level rise
; ADCP
; Comprehensive measurement
; Gulf Stream
; Interannual variability
; Linear least squares
; Long term stability
; Long-term trend
; Sea level
; Ocean currents
; altimetry
; coastal zone
; flow velocity
; geostrophic flow
; least squares method
; oceanic current
; sea level change
; Atlantic Ocean
; Cape Hatteras
; Gulf Stream
; Hatteras Island
; North Carolina
; United States
英文摘要: In contrast to recent claims of a Gulf Stream slowdown, two decades of directly measured velocity across the current show no evidence of a decrease. Using a well-constrained definition of Gulf Stream width, the linear least square fit yields a mean surface layer transport of 1.35 × 105 m2 s-1 with a 0.13% negative trend per year. Assuming geostrophy, this corresponds to a mean cross-stream sea level difference of 1.17 m, with sea level decreasing 0.03 m over the 20 year period. This is not significant at the 95% confidence level, and it is a factor of 2-4 less than that alleged from accelerated sea level rise along the U.S. Coast north of Cape Hatteras. Part of the disparity can be traced to the spatial complexity of altimetric sea level trends over the same period. Key Points Vessel-mounted ADCPs measure currents and transport accurately Gulf Stream shows no weakening unlike recent assertions in literature Clear need for more comprehensive measurements of ocean currents ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84896705898&doi=10.1002%2f2013GL058636&partnerID=40&md5=799857242dc1b8afa3264c97bc28b3b3
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7788
Appears in Collections: 气候减缓与适应
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作者单位: Graduate School of Oceanography, University of Rhode Island, Kingston, RI, United States
Recommended Citation:
Rossby T.,Flagg C.N.,Donohue K.,et al. On the long-term stability of Gulf Stream transport based on 20 years of direct measurements[J]. Geophysical Research Letters,2014-01-01,41(1).