Arc2kmTM: Arctic 2 kilometer Tide Model, 2021

The Arctic 2 km Tide Model (Arc2kmTM) is a barotropic (depth-integrated) ocean tide model on a 2x2 km polar stereographic grid, developed using the Regional Ocean Modeling System (ROMS). The present version of this model is based on dynamics only: there is no data assimilation or nudging to measurements. Arc2kmTM consists of spatial grids of complex amplitude coefficients for sea surface height and depth-integrated currents (“volume transports”) for 8 principal tidal constituents: 4 semidiurnal (M2, S2, K2, N2) and 4 diurnal (K1, O1, P1, Q1). See the Methods section for a description of model development. The Arc2kmTM gridded files are provided in both binary and NetCDF format and are designed to be used with the following open-source packages: the MATLAB “Tide Model Driver” (TMD) toolbox; the community Python-based pyTMD software; and the FORTRAN “OSU Tidal Prediction Software” (OTPS). More information on these software packages is available in the model’s README file. Please also check the ESR Polar Tide Model webpage (https://www.esr.org/research/polar-tide-models/) and our Arctic Data Center Portal (https://arcticdata.io/catalog/portals/ArcticTides) for other Arctic-region barotropic tide models and more information on software packages.