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    Data assimilative hindcast of the Gulf of Maine coastal circulation

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    2004JC002807.pdf (1.985Mb)
    Date
    2005-10-12
    Author
    He, Ruoying  Concept link
    McGillicuddy, Dennis J.  Concept link
    Lynch, Daniel R.  Concept link
    Smith, Keston W.  Concept link
    Stock, Charles A.  Concept link
    Manning, James P.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/3585
    As published
    https://doi.org/10.1029/2004JC002807
    DOI
    10.1029/2004JC002807
    Keyword
     Data assimilation; Coastal ocean modeling; Gulf of Maine circulation 
    Abstract
    A data assimilative model hindcast of the Gulf of Maine (GOM) coastal circulation during an 11 day field survey in early summer 2003 is presented. In situ observations include surface winds, coastal sea levels, and shelf hydrography as well as moored and shipboard acoustic Doppler D current profiler (ADCP) currents. The hindcast system consists of both forward and inverse models. The forward model is a three-dimensional, nonlinear finite element ocean circulation model, and the inverse models are its linearized frequency domain and time domain counterparts. The model hindcast assimilates both coastal sea levels and ADCP current measurements via the inversion for the unknown sea level open boundary conditions. Model skill is evaluated by the divergence of the observed and modeled drifter trajectories. A mean drifter divergence rate (1.78 km d−1) is found, demonstrating the utility of the inverse data assimilation modeling system in the coastal ocean setting. Model hindcast also reveals complicated hydrodynamic structures and synoptic variability in the GOM coastal circulation and their influences on coastal water material property transport. The complex bottom bathymetric setting offshore of Penobscot and Casco bays is shown to be able to generate local upwelling and downwelling that may be important in local plankton dynamics.
    Description
    Author Posting. © American Geophysical Union, 2005. 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 110 (2005): C10011, doi:10.1029/2004JC002807.
    Collections
    • Applied Ocean Physics and Engineering (AOP&E)
    Suggested Citation
    Journal of Geophysical Research 110 (2005): C10011
     

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