کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4552315 | 1328710 | 2011 | 13 صفحه PDF | دانلود رایگان |
In a previous study, the authors studied a low order pressure gradient force (PGF) scheme referred to as the Primitive-Modified scheme, that appears to be equivalent to the Pressure-Jacobian PGF ( Lin, 1997). The scheme was successfully tested on the seamount experiment using a simplified equation of state (EOS). Yet, a complete equation of state, including compressibility effect, can raise a serious problem of accuracy. A new implementation is thus proposed in the present paper. The scheme is rewritten using a (numerically equivalent) geopotential formulation. The PGF truncation errors are removed by computing the EOS compressibility terms with potential temperature and salinity interpolated on a suitable geopotential level. The so-called Equivalent Geopotential Formulation (EGF) method is compared to the Finite-Volume approach proposed by Adcroft et al. (2008).
► A new implementation of the pressure-Jacobian PGF scheme.
► A geopotential formulation adapted to the compressibility terms of the EOS.
► Toward the implementation of the new TEOS-10 equation of state.
Journal: Ocean Modelling - Volume 40, Issue 1, 2011, Pages 1–13