results of latest hycom runs (nrl-rsmas)
DESCRIPTION
Results of latest HYCOM runs (NRL-RSMAS). Z. Garraffo, T. Townsend, G.Halliwell, A. Wallcraft, L. Smith, W.Schmitz, H. Hurlburt, E. Chassignet In collaboration with F. Schott. Veldf4=0.01. Sea surface height for expt 11.8. 1 year: 3-4 north brazil current rings with surface signal; - PowerPoint PPT PresentationTRANSCRIPT
Results of latest HYCOM runs (NRL-RSMAS)
Z. Garraffo, T. Townsend, G.Halliwell, A. Wallcraft, L. Smith, W.Schmitz, H.
Hurlburt, E. Chassignet In collaboration with F. Schott
114 115 117 118
Visco2(nonlin) 0.1 0.1 0.05 0.05
Veldf2(linear) 0.0075 0.003 0.005 A2,.003
cbar .1 .1 .05 .05
Cb 3.e-3 3.e-3 2.e-3 2.e-3
topogr T08 T08 T08 T10
Veldf4=0.01
Sea surface height for expt 11.8
1 year: 3-4 north brazil current rings with surface signal;1 loop current ring detached
Mixed layer depth for expt 11.6
Reduced nonlin visc, bottom drag
Surface speed (1 yr mean) Reduced lapl mom mix
constant A2
Speed sig2=36.77 (~1500m) Reduced lapl mom mix
Reduced nonlin visc, bottom drag constant A2
Speed sig2=37.10 (near bottom) Reduced lapl mom mix
Reduced nonlin visc, bottom drag constant A2
Schmitz, 1996
Schott et al., JPO 2004
IFM , BIO moorings location
Section 43N
Reduced lapl mom mix
constant A2Reduced nonlin visc, bottom drag
uLSWLSWGFZWDSOWsum
15Sv 15Sv
16Sv 16Sv
5Sv 5 5
10Sv 2 5(15)
(7.5)
Speed sig2=36.77 (~1500m)
constant A2
43ºN, nowcast
25Sv
13Sv(18)
012
Section 43NObservations: Schott et al
Reduced nonlin visc, bottom drag
Reduced lapl mom mix
constant A2
5
2.2
2.6
4.9
Tot 9.8/15
2.8
1.2
1.2
2.3Tot 4.7/7.5
Tot 12.2/12.9
(transports in Sv)totals:upsw+Lsw+gfzw+dsowLsw+gfzw+dsow
Observations (Schmitz)
Surface eddy kinetic energy
Deep eddy kinetic energy
Observations (Schmitz)
Summary
Gulfstream characteristics are improved in simulations with lower viscosity
at 43N:Deep western boundary current was also improved.
Diffusion affects how the deep southward overturn flow is distributed across longitudes.
In 1 model year, expt 118 shows: 3-4 North Brazil current rings with surface
expression1 loop current ring detached
Plots in http://hycom.rsmas.miami.edu/internal/zulema