Movies from a series of idealized geometry experiments with ROMS at various horizontal and vertical resolutions from 85 km 20 layers to 10 km 40 layers:
mid-latitude flat-bottom beta-plane Cartesian ocean basin,
forced by prescribed surface fluxes of heat varying linearly with latitude,
vertical mixing uniform (Kv=10^{-4} m2/s for the reference case),
horizontal mixing and diffusivity let to the numerical scheme.
Default movies show
annually-averaged Sea Surface Temperature anomalies in the upper 100m (SST100),
with an indication of the MOC amplitude.
Some animations of temperature anomalies at other depth are shown, labelled as
TXXXm (T702m for instance).
Experiments with no wind forcing
| Kv (m^2 s^{-1}): | 1e-4 | 3e-5 | 1e-5 | |
| 85km Kh700 | yr500-1000 | |||
| 40km L20 | yr2070-2270 | yr2001-2199 | yr1950-2150 | |
| 20km L40 | yr891-1071 | SST100 yr556-691 T546m yr423-691 T702m yr423-691 |
yr205-409 | |
| 10km L40 | SLA yr288-514 +/-0.25m yr288-512 |
SLA yr253-507 +/-0.25m SST100 yr259-507 T702m yr250-507 |
SLA yr253-508 +/-0.25m yr253-508 |
Experiments with double-gyre wind forcing
| Kv (m^2 s^{-1}): | 1e-4 | 3e-5 | 1e-5 | |
| 85km Kh700 | ||||
| 40km L20 | yr2000-2200 | |||
| 20km L40 | yr178-355 | |||
| 10km L40 |
SLA 10-yrRM +/-0.25m yr182-363 |
yr154-309 |
List of experiments from lower to higher resolution :
Evolution of annual-mean SST at 85km resolution, years 500-1000 (183MB)
Evolution of annual-mean SST (0-100m) at 40km resolution, years 2001-2070 (26MB)
Evolution of annual-mean SST (0-100m) at 20km resolution, years 891-1071 (66MB)
Evolution of annual-mean SST (0-100m) at 20km resolution with vertical mixing reduced to Kv=10^{-5} m2/s, years 205-409 (75MB)
Evolution of annual-mean SST (0-100m) at 20km resolution with vertical mixing reduced to Kv=10^{-5} m2/s and double-gyre wind forcing, years 178-355 (65MB)
Reference : Huck, T., O. Arzel, F. Sevellec, 2014: Multidecadal variability of the overturning circulation in presence of eddy turbulence. Journal of Physical Oceanography, submitted June 2014.