Sediment dispersal in the northwestern Adriatic Sea
Harris, Courtney K.
Sherwood, Christopher R.
Signell, Richard P.
Bever, Aaron J.
Warner, John C.
MetadataShow full item record
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.
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.
Suggested CitationJournal of Geophysical Research 113 (2008): C11S03
Showing items related by title, author, creator and subject.
Rypina, Irina I.; Brown, Michael G.; Kocak, Huseyin (American Meteorological Society, 2009-03)Motivated by observations of surface drifters in the Adriatic Sea, transport in a three-gyre system is studied with the aid of dynamical systems techniques. Particular attention is paid to the issue of intergyre transport. ...
Signell, Richard P.; Chiggiato, Jacopo; Horstmann, Jochen; Doyle, James D.; Pullen, Julie; Askari, Farid (American Geophysical Union, 2010-04-24)The Adriatic Sea is regularly subjected to strong Bora wind events from the northeast during winter. The events have a strong effect on the oceanography in the Adriatic, driving basin-scale gyres that determine the transport ...
Variational analysis of drifter positions and model outputs for the reconstruction of surface currents in the central Adriatic during fall 2002 Taillandier, V.; Griffa, A.; Poulain, Pierre Marie; Signell, Richard P.; Chiggiato, Jacopo; Carniel, Sandro (American Geophysical Union, 2008-04-04)In this paper we present an application of a variational method for the reconstruction of the velocity field in a coastal flow in the central Adriatic Sea, using in situ data from surface drifters and outputs from the ROMS ...