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    Sediment dispersal in the northwestern Adriatic Sea

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    2006JC003868.pdf (1.634Mb)
    Date
    2008-10-29
    Author
    Harris, Courtney K.  Concept link
    Sherwood, Christopher R.  Concept link
    Signell, Richard P.  Concept link
    Bever, Aaron J.  Concept link
    Warner, John C.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/3591
    As published
    https://doi.org/10.1029/2006JC003868
    DOI
    10.1029/2006JC003868
    Keyword
     Sediment; Numerical model; Adriatic Sea 
    Abstract
    Sediment dispersal in the Adriatic Sea was evaluated using coupled three-dimensional circulation and sediment transport models, representing conditions from autumn 2002 through spring 2003. The calculations accounted for fluvial sources, resuspension by waves and currents, and suspended transport. Sediment fluxes peaked during southwestward Bora wind conditions that produced energetic waves and strengthened the Western Adriatic Coastal Current. Transport along the western Adriatic continental shelf was nearly always to the south, except during brief periods when northward Sirocco winds reduced the coastal current. Much of the modeled fluvial sediment deposition was near river mouths, such as the Po subaqueous delta. Nearly all Po sediment remained in the northern Adriatic. Material from rivers that drain the Apennine Mountains traveled farther before deposition than Po sediment, because it was modeled with a lower settling velocity. Fluvial sediment delivered to areas with high average bed shear stress was more highly dispersed than material delivered to more quiescent areas. Modeled depositional patterns were similar to observed patterns that have developed over longer timescales. Specifically, modeled Po sediment accumulation was thickest near the river mouth with a very thin deposit extending to the northeast, consistent with patterns of modern sediment texture in the northern Adriatic. Sediment resuspended from the bed and delivered by Apennine Rivers was preferentially deposited on the northern side of the Gargano Peninsula, in the location of thick Holocene accumulation. Deposition here was highest during Bora winds when convergences in current velocities and off-shelf flux enhanced delivery of material to the midshelf.
    Description
    Author Posting. © American Geophysical Union, 2008. 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 113 (2008): C11S03, doi:10.1029/2006JC003868.
    Collections
    • Sediment Transport
    Suggested Citation
    Article: Harris, Courtney K., Sherwood, Christopher R., Signell, Richard P., Bever, Aaron J., Warner, John C., "Sediment dispersal in the northwestern Adriatic Sea", Journal of Geophysical Research 113 (2008): C11S03, DOI:10.1029/2006JC003868, https://hdl.handle.net/1912/3591
     

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