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DOI10.1029/2020GL087014
Interannual Variability of the Outflow of Weddell Sea Bottom Water
Gordon A.L.; Huber B.A.; Abrahamsen E.P.
Date Issued2020
ISSN 0094-8276
Volume47Issue:4
Other AbstractThe Weddell Sea Bottom Water (WSBW) export from 1999 to 2019 displays distinct seasonal and interannual variability. From 2014 into 2017 a marked salinity decrease was recorded, with the lowest salinity, 34.615, attained in early 2016. The reduced salinity is derived from the V-shaped trough formed by a double front along the shelf break of the Weddell Gyre's western boundary, which is filled with a blend of surface water and modified Weddell Deep Water. We estimate that when the V-shaped apex attains a depth of greater than ~700 m, the thermobaric effect promotes its descent into the WSBW. We propose that this occurred during anomalously strong cyclonic wind stress curl over the Weddell Gyre from 2014 into 2017, which increased the intensity of the gyre and its western boundary current, deepening the V-shape trough. The WSBW salinity increased to its prior to 2014 values as the wind stress relaxed in 2018. © 2020. The Authors.
enkeywordsWind stress; Antarctic Bottom Water; Interannual variability; Seasonal and interannual variability; Thermobaric effects; Weddell deep waters; Weddell Sea; Western boundary; Western boundary currents; Surface waters; annual variation; salinity; seasonal variation; shelf break; surface water; wind stress; Southern Ocean; Weddell Sea
Language英语
journalGeophysical Research Letters
Source Publication英国自然环境研究理事会
Document Type期刊论文
Identifierhttp://gcip.llas.ac.cn/handle/2XKMVOVA/170647
AffiliationLamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States; British Antarctic Survey, Natural Environment Research Council, Cambridge, United Kingdom
Recommended Citation
GB/T 7714
Gordon A.L.,Huber B.A.,Abrahamsen E.P.. Interannual Variability of the Outflow of Weddell Sea Bottom Water[J]. 英国自然环境研究理事会,2020,47(4).
APA Gordon A.L.,Huber B.A.,&Abrahamsen E.P..(2020).Interannual Variability of the Outflow of Weddell Sea Bottom Water.Geophysical Research Letters,47(4).
MLA Gordon A.L.,et al."Interannual Variability of the Outflow of Weddell Sea Bottom Water".Geophysical Research Letters 47.4(2020).
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