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    CLIMODE bobber data report : July 2005 - May 2009

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    WHOI-2010-03.pdf (25.83Mb)
    Date
    2010-03
    Author
    Fratantoni, David M.  Concept link
    McKee, Theresa K.  Concept link
    Hodges, Benjamin A.  Concept link
    Furey, Heather H.  Concept link
    Lund, John M.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/3641
    Location
    North Atlantic Ocean
    DOI
    10.1575/1912/3641
    Keyword
     Oceanus (Ship : 1975-) Cruise OC419; Oceanus (Ship : 1975-) Cruise OC434; Oceanus (Ship : 1975-) Cruise OC442; Knorr (Ship : 1970-) Cruise KN188-01; Knorr (Ship : 1970-) Cruise KN188-02; Atlantis (Ship : 1997-) Cruise AT13; Ocean currents; Oceanographic buoys 
    Abstract
    This report summarizes direct observations of Eighteen Degree Water (EDW) subduction and dispersal within the subtropical gyre of the North Atlantic Ocean. Forty acoustically-tracked bobbing, profiling floats (“bobbers”) were deployed to study the formation and dispersal of EDW in the western North Atlantic. The unique bobber dataset described herein provides insight into the evolution of EDW by means of direct, eddy-resolving measurement of EDW Lagrangian dispersal pathways and stratification. Bobbers are modified Autonomous Profiling Explorer (APEX) profiling floats which actively servo their buoyancy control mechanism to follow a particular isothermal surface. The CLIVAR Mode Water Dynamics Experiment (CLIMODE) bobbers tracked the 18.5°C temperature surface for 3 days, then bobbed quickly between the 17°C and 19°C isotherms. This cycle was repeated for one month, after which each bobber profiled to 1000 m before ascending to the surface to transmit data. The resulting dataset (37/40 tracked bobbers; more than half still profiling as of January 2010) yields well-resolved trajectories, unprecedented velocity statistics in the core of the subducting and spreading EDW, and detailed information about the Lagrangian evolution of EDW thickness and vertical structure. This report provides an overview of the experimental procedure employed and summarizes the initial processing of the bobber dataset.
    Collections
    • Physical Oceanography (PO)
    • WHOI Technical Reports
    Suggested Citation
    Fratantoni, D. M., McKee, T. K., Hodges, B. A., Furey, H. H., & Lund, J. M. (2010). CLIMODE bobber data report: July 2005 - May 2009. Woods Hole Oceanographic Institution. https://doi.org/10.1575/1912/3641
     

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