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New ROMS configuration for Southern California Bight
Descendant of the previous UCLA configurations(cf., Marchesiello et al. 2003; Dong at al., 2009)
Improved from the previous SCB 1-km modeling
- higher resolutions(L1: 20 km → 5 km, L2: 6 km → 1 km, L3: 1 km → 250 m,...)
- use of UCLA ROMS (were IRD-ROMS-AGRIF)better hydrodynamic kernel, robust KPP, better MPI scaling,...
- more frequent boundary update (was 30 days → 2 hours)
- inclusion of surface gravity waves
- utility of WRF (was MM5) and SWAN
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Newest quadrupleNested ROMS configuration
L1 (5 km)
L2 (1 km)L2 (1 km)
L3 (250 m)
L3 (250 m) L4 (75 m) L4 (75 m)
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L3 (250 m) runs(Aug. - Nov., 2006)
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USWL3 250 m, z = 0 m
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USWL3 250 m, z = -100 m
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USWL3 250 m, z = -500 m
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Effects of surface waves(subtidal EKE)
w/o wave
w/ wave
difference
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Conservative Wave Effects: Overall Thermocline Deepening and Altering Upper Mean Circulation
with WEC (with WEC) – (no WEC)
mean mixed-layer depth(KPP hbl)
mean stream function(upper layer > -25 m)
x 103 (m2/s)
(m)
with WEC (with WEC) – (no WEC)
~15 %
~15 %
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Vortex force vs. Stokes-Coriolis effect
- mean advection of eddies (JSC : Stokes-Coriolis force)- eddy-wave interaction (JVF : vortex force) --> exceeds JSC
~ <JVF>/<JSC>Ro=
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L4 (75 m) runs(Aug. - Nov., 2006)
HTP 1-/5-mile outfalls
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mean depth-integrated passive tracer concentration
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mean tracer concentration along HTP transect
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mean velocity along HTP transect
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Mean mixed layer depth(from KPP)
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Hovmoller plotsof depth-averagedtracer concentration
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Alongshore profiles of depth-averaged tracer concentration at the shoreline
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Time series of depth-averaged tracer concentration at the shoreline at selected locations.
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Single-point PDF of depth-averaged passive tracer concentrations at the shore
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PSD of depth-averaged passive tracer concentrations at the shoreline
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SSS
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Hovmoller plotsof shoreline SSS
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Mean surface normalized relative vorticity and TKE (all frequencies)
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bandpass-filtered surface kinetic energy
high frq. (< 8h) semi-diurnal diurnal sub-tidal (> 36h)
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L5 (20 m) test run(7 days in Nov., 2006)
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