Cohesive and mixed sediment in the Regional Ocean Modeling System (ROMS v3.6) implemented in the Coupled Ocean-Atmosphere-Wave-Sediment Transport Modeling System (COAWST r1234)
|Author(s)||Sherwood Christopher R.1, Aretxabaleta Alfredo L.1, Harris Courtney K.2, Rinehimer J. Paul2, 4, Verney Romaric3, Ferre Benedicte1, 5|
|Affiliation(s)||1 : US Geol Survey, 384 Woods Hole Rd, Woods Hole, MA 02543 USA.
2 : Coll William & Mary, Virginia Inst Marine Sci, Gloucester Point, VA 23062 USA.
3 : IFREMER, Plouzane, France.
4 : WEST Consultants, Bellevue, WA 98055 USA.
5 : UiT, CAGE Ctr Arctic Gas Hydrate Environm & Climate, Dept Geosci, N-9037 Tromso, Norway.
|Source||Geoscientific Model Development (1991-959X) (Copernicus Gesellschaft Mbh), 2018-05 , Vol. 11 , N. 5 , P. 1849-1871|
|WOS© Times Cited||42|
We describe and demonstrate algorithms for treating cohesive and mixed sediment that have been added to the Regional Ocean Modeling System (ROMS version 3.6), as implemented in the Coupled Ocean-Atmosphere-Wave- Sediment Transport Modeling System (COAWST Subversion repository revision 1234). These include the following: floc dynamics (aggregation and disaggregation in the water column); changes in floc characteristics in the seabed; erosion and deposition of cohesive and mixed (combination of cohesive and non-cohesive) sediment; and biodiffusive mixing of bed sediment. These routines supplement existing noncohesive sediment modules, thereby increasing our ability to model fine-grained and mixed-sediment environments. Additionally, we describe changes to the sediment bed layering scheme that improve the fidelity of the modeled stratigraphic record. Finally, we provide examples of these modules implemented in idealized test cases and a realistic application.