{"refrec":{"BRefID":102844,"RR":"<b>Hanert, E.; Le Roux, D.Y.; Legat, V.; Deleersnijder, E.</b> (2004). Advection schemes for unstructured grid ocean modelling. <i>Ocean Modelling 7(1-2)</i>: 39-58. <a href=\"http://dx.doi.org/10.1016/S1463-5003(03)00029-5\" target=\"_blank\">dx.doi.org/10.1016/S1463-5003(03)00029-5</a>","BEntID":99629,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Ocean Modelling 7(1-2)</i>: 39-58. <a href=\"https://dx.doi.org/10.1016/S1463-5003(03)00029-5\" target=\"_blank\">https://dx.doi.org/10.1016/S1463-5003(03)00029-5</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Hanert, E.; Le Roux, D.Y.; Legat, V.; Deleersnijder, E.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Hanert, E. <i>et al.</i>","Englishabstract":"We study advection schemes for unstructured grid ocean models. Four linear advection schemes are investigated by solving a scalar transport equation. Schemes under consideration include continuous, nonconforming and discontinuous finite elements and finite volumes. A comprehensive derivation of the numerical schemes is presented and conservation and dispersion properties are discussed. An assessment is made by performing the test problem introduced by Hecht et al. [J. Geophys. Res. 100 (1995) 20763] in which a passive scalar field is advected through an analytical Stommel gyre. It is found that continuous finite elements and finite volumes have some difficulties to represent accurately solutions with steep gradients. As a result they are prone to generate unphysical oscillations. On the other hand, discontinuous and non-conforming finite element schemes perform better. 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