Modeling wave-ocean processes, dense water dynamics, sediment transport and continental margin...
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modeling wave-ocean processes, dense water dynamics, sediment transport and continental margin reshaping in the Adriatic Sea Woods Hole, Aug 28 2014, COAWST training FROM SEA WAVES TO MUD WAVES D. Bonaldo Contributions from A. Benetazzo, A. Bergamasco, S. Carniel, F.M. Falcieri, M. Sclavo, F. Trincardi
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Transcript of Modeling wave-ocean processes, dense water dynamics, sediment transport and continental margin...
modeling wave-ocean processes, dense water dynamics, sediment transport and continental
margin reshaping in the Adriatic Sea
Woods Hole, Aug 28 2014, COAWST training
FROM SEA WAVESTO MUD WAVES
D. Bonaldo
Contributions from A. Benetazzo, A. Bergamasco, S. Carniel, F.M. Falcieri, M. Sclavo, F. Trincardi
COAWST TrainingWoods Hole, Aug 28 ,2014
DENSE WATER IN THE ADRIATIC SEA
Explain Bedform patchyness in the Southern Adriatic Margin (SAM)
Assess the role of different forcing factors in controlling mass transport
Identify dense water and sediment pathways
Modelgeneration, propagation and cascading of DW in Winter 2012
2 Way Coupled ROMS+SWAN
8 non-cohesive Sediment classes (4 grain sizes)
20 River mouths
Dx=1 km 272 X 752 X 30 cellsVtransform= 2Vstretching= 4THETA_S = 1 THETA_B = 3.0TCLINE = 1.9
Seabed: 15, 63, 125, 225 mmAlpine, Apennine: 15, 63 mm
8 Tidal components M2, S2, N2, K2, O1, K1, P1, Q1
18 (W) + 2 (E)
Same grid, 36 directions, 40 intrinsic frequencies
Uncoupled ROMS
MODEL SET UP
VS
COAWST TrainingWoods Hole, Aug 28 ,2014
MODEL SET UP
BC (Otranto Strait): Mediterranean Forecasting System (MFS)
IC (Nov 1, 2011), Hydrodynamics: Adriatic Sea op. ROMS, 2x2 km hor. res.
Atmospheric forcing: COSMO-I7, 7x7 km hor. res., 35 sigma levels
Radiation-Nudging 3-D momentum and tracers fluxesChapman Free-surface and tangential component of the barotropic velocityFlather Normal component of the barotropic
velocity
1/16° x 1/16° hor. resolution
Bot. Sediment: Harris et al., 2008; Sclavo et al., 2013
Coupling: #define WEC_VF#define WDISS_WAVEMOD#define UV_KIRBY
#define COARE_TAYLOR_YELLAND #define ZOS_HSIG#define TKE_WAVEDISS#define BEDLOAD_SOULSBY
COAWST TrainingWoods Hole, Aug 28 ,2014
UTRSCTRS
SST
UV
COUPLING AND SURFACE DYNAMICS
Effects of coupling on surface circulation…
… and enhanced air-sea heat fluxes
•Bottom stress, sediment resuspension•Tracers advection and patterns•Momentum of outflowing DW•Warm and salty water intrusion
•Physical properties of dense waters•Overall dense water production
COAWST TrainingWoods Hole, Aug 28 ,2014
MASS FLUXES IN THE SOUTHERN ADRIATIC SEA
COAWST TrainingWoods Hole, Aug 28 ,2014
MASS FLUXES IN THE SOUTHERN ADRIATIC SEA
Sediment-induced density along-shelf DW pathway
COAWST TrainingWoods Hole, Aug 28 ,2014
MASS FLUXES IN THE SOUTHERN ADRIATIC SEA
Sediment-induced density
Waves effect on DW
Along-shelf DW pathway
Produced volume DW trajectory
COAWST TrainingWoods Hole, Aug 28 ,2014
MASS FLUXES IN THE SOUTHERN ADRIATIC SEA
Sediment-induced density
Waves effect on DW
Waves effect on sed. transport
Along-shelf DW pathway
Produced volume DW trajectory
Total sediment volume Sediment trajectory
COAWST TrainingWoods Hole, Aug 28 ,2014
HYDRODYNAMIC REGIME AND BEDFORM PATCHYNESS
Cascading-related acceleration and deceleration patterns are compatible
with erosional and depositional bedform configuration
Perturbations to geostrophic equilibrium are controlled
by variations in seabed curvature and slope
COAWST TrainingWoods Hole, Aug 28 ,2014
OUR COMMENTS (what about yours?)
DENSE WATER DYNAMICS SHOW DIVERSE RESPONSE TO VARIABLE FORCING FACTORS
GREAT EXPECTATIONS ON NESTING ON KEY MORPHOLOGICAL FEATURES…
CENTRAL ROLE OF WAVESAND TOPOGRAPHY
COAWST TrainingWoods Hole, Aug 28 ,2014
…AND ON COHESIVE/MIXED SEDIMENT FORMULATION!
