• Login
    About WHOAS
    View Item 
    •   WHOAS Home
    • Woods Hole Oceanographic Institution
    • Physical Oceanography (PO)
    • View Item
    •   WHOAS Home
    • Woods Hole Oceanographic Institution
    • Physical Oceanography (PO)
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of WHOASCommunities & CollectionsBy Issue DateAuthorsTitlesKeywordsThis CollectionBy Issue DateAuthorsTitlesKeywords

    My Account

    LoginRegister

    Statistics

    View Usage Statistics

    Direct observations of the Antarctic Slope Current transport at 113°E

    Thumbnail
    View/Open
    Pe-a-Molino_et_al-2016-Journal_of_Geophysical_Research__Oceans.pdf (3.049Mb)
    Date
    2016-10-12
    Author
    Pena-Molino, Beatriz  Concept link
    McCartney, Michael S.  Concept link
    Rintoul, Stephen R.  Concept link
    Metadata
    Show full item record
    Citable URI
    https://hdl.handle.net/1912/8632
    As published
    https://doi.org/10.1002/2015JC011594
    DOI
    10.1002/2015JC011594
    Keyword
     Antarctic Slope Current; Transport; Barotropic; Time-mean; Variability; Subpolar gyre 
    Abstract
    The Antarctic Slope Current (ASC), defined here as the region of westward flow along the continental slope off Antarctica, forms the southern limb of the subpolar gyres. It regulates the exchange of water across the shelf break and provides a path for interbasin westward transport. Despite its significance, the ASC remains largely unobserved around most of the Antarctic continent. Here we present direct velocity observations from a 17 month current meter moored array deployed across the continental slope between the 1000 and the 4200 m isobaths, in the southeastern Indian Ocean near 113°E. The observed time-mean flow consists of a surface-intensified jet associated with the Antarctic Slope Front (ASF) and a broader bottom-intensified westward flow that extends out to approximately the 4000 m isobath and is strongest along the upper slope. The time-mean transport of the ASC is −29.2 Sv. Fluctuations in the transport are large, typically exceeding the mean by a factor of 2. They are mainly due to changes in the northward extent of the current over the lower slope. However, seasonal changes in the wind also drive variations in the transport of the ASF and the flow in the upper slope. Both mean and variability are largely barotropic, thus invisible to traditional geostrophic methods
    Description
    Author Posting. © American Geophysical Union, 2016. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Oceans 121 (2016): 7390–7407, doi:10.1002/2015JC011594.
    Collections
    • Physical Oceanography (PO)
    Suggested Citation
    Journal of Geophysical Research: Oceans 121 (2016): 7390–7407
     

    Related items

    Showing items related by title, author, creator and subject.

    • Thumbnail

      Subtidal current structure and variability of the continental shelf and slope of the northern South China Sea 

      Tai, Jen-Hua; Yang, Kai-Chieh; Gawarkiewicz, Glen G. (Terrestrial, Atmospheric and Oceanic Sciences, 2017-06)
      The spatial structures and temporal variations in subtidal currents in the northern South China Sea (SCS) are quantified in this study using 20-day to 9-month measurements from eight acoustic Doppler current profiler ...
    • Thumbnail

      Winter mesoscale circulation on the shelf slope region of the southern Drake Passage 

      Zhou, Meng; Zhu, Yiwu; Measures, Christopher I.; Hatta, Mariko; Charette, Matthew A.; Gille, Sarah T.; Frants, Marina; Jiang, Mingshun; Mitchell, B. Gregory (2013-02-20)
      An austral winter cruise in July-August 2006 was conducted to study the winter circulation and iron delivery processes in the Southern Drake Passage and Bransfield Strait. Results from current and hydrographic measurements ...
    • Thumbnail

      Seasonal cycle of circulation in the Antarctic Peninsula and the off-shelf transport of shelf waters into southern Drake Passage and Scotia Sea 

      Jiang, Mingshun; Charette, Matthew A.; Measures, Christopher I.; Zhu, Yiwu; Zhou, Meng (2013-01-23)
      The seasonal cycle of circulation and transport in the Antarctic Peninsula shelf region is investigated using a high-resolution (~2km) regional model based on the Regional Oceanic Modeling System (ROMS). The model also ...
    All Items in WHOAS are protected by original copyright, with all rights reserved, unless otherwise indicated. WHOAS also supports the use of the Creative Commons licenses for original content.
    A service of the MBLWHOI Library | About WHOAS
    Contact Us | Send Feedback | Privacy Policy
    Core Trust Logo