DOI: 10.1002/2014GL061160
论文题名: Low-frequency thermohaline variability in the Subtropical South Atlantic pycnocline during 2002-2013
作者: Kolodziejczyk N. ; Reverdin G. ; Gaillard F. ; Lazar A.
刊名: Geophysical Research Letters
ISSN: 0094-9790
EISSN: 1944-9521
出版年: 2014
卷: 41, 期: 18 起始页码: 6468
结束页码: 6475
语种: 英语
英文关键词: Aguhlas leakage
; Argo data
; South Atlantic gyre
; thermohaline interannual variability
; vertical mixing
; water masses propagation
Scopus关键词: Crack propagation
; Mixing
; Oceanography
; Tropics
; Argo data
; Interannual variability
; South Atlantic
; Vertical mixing
; Water mass
; Ocean habitats
; air-sea interaction
; data set
; frequency analysis
; meridional circulation
; mixed layer
; pycnocline
; thermohaline circulation
; vertical mixing
; water mass
; Atlantic Ocean
; Atlantic Ocean (Subtropical)
英文摘要: Low-frequency variability of spiciness is observed in the Subtropical South Atlantic over the period 2002-2013 with the Argo gridded product In Situ Analysis System. Within the pycnocline, spiciness anomalies propagate at a mean speed of 0.04 ± 0.02 m s-1, the same speed as the gyre mean circulation, from the Agulhas Retroflection region off South Africa (~35°S-20°E) toward the South American coast (~18°S-35°W). After 2010, propagation is still found, but stationary local spiciness generation is also found over the Subtropical South Atlantic. This spiciness increase is associated with high values of vertical Turner angle below the mixed layer base during late winter. This suggests spice injection resulting from penetrative convective mixing due to air-sea buoyancy loss. These features may have an impact on the low-frequency warm and salty signal produced by the Agulhas leakage in Subtropical South Atlantic and the upper branch of the Atlantic Meridional Overturning Circulation. Key Points Evidence of spiciness propagation in the South Atlantic pycnoclineThese propagations are probably associated with Agulhas leakagePotential impact of ocean and atmosphere on this leakage ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911384154&doi=10.1002%2f2014GL061160&partnerID=40&md5=a1def360e54537f25d6d2a65c1c91433
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7054
Appears in Collections: 气候减缓与适应
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作者单位: Sorbonne Universités (UPMC, Univ Paris 06)-CNRS-IRD-MNHN, LOCEAN Laboratory, Paris, France
Recommended Citation:
Kolodziejczyk N.,Reverdin G.,Gaillard F.,et al. Low-frequency thermohaline variability in the Subtropical South Atlantic pycnocline during 2002-2013[J]. Geophysical Research Letters,2014-01-01,41(18).