Regional internal tide models need prudent eddy viscosity selections for dependable estimations

Abstract

Many studies on internal tides (ITs) are conducted through numerical simulations. One major challenge involves the large discrepancies in baroclinic energetics in regional seas, such as the Luzon Strait (LS). These discrepancies may partially be related to the variation in eddy viscosity selections. Evident increase in eddy viscosities can affect the baroclinic energy balances and reduce simulation error in the LS. Finally, horizontal mixing parameterization schemes are found to be significant in improving the performance of regional IT modeling. The finding highlights the significance of eddy viscosity, which may make contributions to improve regional IT estimations.