ACC sector model

class veros.setup.acc_sector.ACCSectorSetup(state=None, override=None, plugins=None)[source]

Bases: veros.veros.VerosSetup

A model using spherical coordinates with a partially closed domain representing the narrow sector of Atlantic and ACC.

The bathymetry of the model is idealized to a flat-bottom (with depth of 4000 m) over the majority of the domain, except a half depth appended within the confines of the circumpolar channel at the inflow and outflow regions. The horizontal grid has resolution of \(2 \times 2\) degrees, and the vertical one has 40 levels.

Wind forcing over the sector part and buoyancy relaxation drive a large-scale meridional overturning circulation.

This setup demonstrates:

  • setting up an idealized geometry after (Munday et al., 2013).

  • modifing surface forcings over selected regions of the domain

  • sensitivity of circumpolar transport and meridional overturning to changes in Southern Ocean wind stress and buoyancy anomalies

  • basic usage of diagnostics

Adapted from ACC channel model.

Reference:

Laurits S. Andreasen. (2019). Time scales of the Bipolar seesaw: The role of oceanic cross-hemisphere signals, Southern Ocean eddies and wind changes, MSc Thesis, 42p. https://sid.erda.dk/share_redirect/CVvcrowL22/Thesis/Laurits_Andreasen_MSc_thesis.pdf.