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Baroclinic adjustment in Drake Passage driven by tropical Pacific forcing

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Close, Sally E. Naveira Garabato, Alberto C.

The time series of high-quality hydrographic measurements of the ACC in Drake Passage is revisited to investigate the extent of baroclinic adjustment in the region on time scales of up to two decades. We find that substantial adjustment of the upper kilometer of northern Drake Passage has occurred on interannual to decadal time scales, driven primarily by tropical Pacific forcing via the poleward propagation of boundary waves. The decadal-scale signal consists of a marked deepening of isopycnals (by ∼200m between the early 1990s and the late 2000s), and reflects ENSO-forced wind-driven baroclinic changes over an extensive region of the eastern South Pacific. © 2012. American Geophysical Union. All Rights Reserved.

Document type Article de périodique (Journal article) – Article de recherche
Publication date 2012
Language Anglais
Journal information "Geophysical Research Letters" - Vol. 39, no. 19 (2012)
Peer reviewed yes
Publisher Wiley-Blackwell Publishing, Inc.
e-issn 1944-8007
issn 0094-8276
Publication status Publié
Links
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Bibliographic reference Close, Sally E. ; Naveira Garabato, Alberto C.. Baroclinic adjustment in Drake Passage driven by tropical Pacific forcing. In: Geophysical Research Letters, Vol. 39, no. 19 (2012)
Permanent URL http://hdl.handle.net/2078.1/161116