FN Archimer Export Format
PT J
TI The tidal effects in the Finite-volumE Sea ice–Ocean Model (FESOM2.1): a comparison between parameterised tidal mixing and explicit tidal forcing
BT 
AF Song, Pengyang
   Sidorenko, Dmitry
   Scholz, Patrick
   Thomas, Maik
   Lohmann, Gerrit
AS 1:1;2:1;3:1;4:2,3;5:1,4;
FF 1:;2:;3:;4:;5:;
C1 Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI), Bremerhaven, Germany
   Helmholtz Centre Potsdam – GFZ German Research Centre for Geosciences, Potsdam, Germany
   Institute of Meteorology, Freie Universität Berlin, Berlin, Germany
   MARUM – Centre for Marine Environmental Sciences, University of Bremen, Bremen, Germany
C2 INST A WEGENER, GERMANY
   GFZ, GERMANY
   UNIV FREE BERLIN, GERMANY
   UNIV BREMEN MARUM, GERMANY
IN DOAJ
IF 5.1
TC 1
UR https://archimer.ifremer.fr/doc/00838/94985/102587.pdf
   https://archimer.ifremer.fr/doc/00838/94985/102588.pdf
LA English
DT Article
CR NIVMER
AB Tides are proved to have a significant effect on the ocean and climate. Previous modelling research either adds a tidal mixing parameterisation or an explicit tidal forcing to the ocean models. However, no research compares the two approaches in the same framework. Here we implement both schemes in a general ocean circulation model and assess both methods by comparing the results. The aspects for comparison involve hydrography, sea ice, meridional overturning circulation (MOC), vertical diffusivity, barotropic streamfunction and energy diagnostics. We conclude that although the mesh resolution is poor in resolving internal tides in most mid-latitude and shelf-break areas, explicit tidal forcing still shows stronger tidal mixing at the Kuril–Aleutian Ridge and the Indonesian Archipelago than the tidal mixing parameterisation. Beyond that, the explicit tidal forcing method leads to a stronger upper cell of the Atlantic MOC by enhancing the Pacific MOC and the Indonesian Throughflow. Meanwhile, the tidal mixing parameterisation leads to a stronger lower cell of the Atlantic MOC due to the tidal mixing in deep oceans. Both methods maintain the Antarctic Circumpolar Current at a higher level than the control run by increasing the meridional density gradient. We also show several phenomena that are not considered in the tidal mixing parameterisation, for example, the changing of energy budgets in the ocean system, the bottom drag induced mixing on the continental shelves and the sea ice transport by tidal motions. Due to the limit of computational capacity, an internal-tide-resolving simulation is not feasible for climate studies. However, a high-resolution short-term tidal simulation is still required to improve parameters and parameterisation schemes in climate studies. 
PY 2023
PD JAN
SO Geoscientific Model Development
SN 1991-959X
PU Copernicus GmbH
VL 16
IS 1
UT 000912703800001
BP 383
EP 405
DI 10.5194/gmd-16-383-2023
ID 94985
ER

EF