@article{PAR00002830,
  title = {{I}nfluence of numerical schemes on current-topography interactions in 1/4° global ocean simulations},
  author = {{P}enduff, {T}. and {L}e {S}ommer, {J}. and {B}arnier, {B}. and {T}reguier, {A}.{M}. and {M}olines, {J}.{M}. and {M}adec, {G}urvan},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he combined use of partial steps and of an energy-enstrophy conserving momentum advection scheme was shown by {B}arnier et al. (2006) to yield substantial improvements in the surface solution of the {DRAKKAR} Ρ global sea-ice/ocean model. {T}he present study extends this investigation below the surface with a special focus on the {A}tlantic and reveals many improvements there as well: e.g. more realistic path, structure and transports of major currents ({G}ulf {S}tream, {N}orth {A}tlantic {C}urrent, {C}onfluence region, {Z}apiola anticyclone), behavior of shedded rings, narrower subsurface boundary currents, stronger mean and eddy flows ({MKE} and {EKE}) at depth, beneficial enhancement of cyclonic (anticyclonic) flows around topographic depressions (mountains). {I}nterestingly, adding a no-slip boundary condition to this improved model setup cancels most of these improvements, bringing back the biases diagnosed without the improved momentum advection scheme and partial steps (these biases are typical of other models at comparable or higher resolutions). {T}his shows that current-topography interactions and full-depth eddy-admitting model solutions can be seriously deteriorated by near-bottom sidewall friction, either explicit or inherent to inadequate numerical schemes.},
  keywords = {},
  booktitle = {},
  journal = {{O}cean {S}cience {D}iscussions},
  volume = {4},
  numero = {3},
  pages = {491--528},
  year = {2007},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00002830},
}