!----------------------------------------------------------------------- &namtra_ldf ! lateral diffusion scheme for tracers (default: NO selection) !----------------------------------------------------------------------- ! ! Operator type: ln_traldf_OFF = .false. ! No explicit diffusion ln_traldf_lap = .false. ! laplacian operator ln_traldf_blp = .false. ! bilaplacian operator ! ! ! Direction of action: ln_traldf_lev = .false. ! iso-level ln_traldf_hor = .false. ! horizontal (geopotential) ln_traldf_iso = .false. ! iso-neutral (standard operator) ln_traldf_triad = .false. ! iso-neutral (triad operator) ! ! ! iso-neutral options: ln_traldf_msc = .false. ! Method of Stabilizing Correction (both operators) rn_slpmax = 0.01 ! slope limit (both operators) ln_triad_iso = .false. ! pure horizontal mixing in ML (triad only) rn_sw_triad = 1 ! =1 switching triad ; =0 all 4 triads used (triad only) ln_botmix_triad = .false. ! lateral mixing on bottom (triad only) ! ! ! Coefficients: nn_aht_ijk_t = 0 ! space/time variation of eddy coefficient: ! ! =-20 (=-30) read in eddy_diffusivity_2D.nc (..._3D.nc) file ! ! = 0 constant ! ! = 10 F(k) =ldf_c1d ! ! = 20 F(i,j) =ldf_c2d ! ! = 21 F(i,j,t) =Treguier et al. JPO 1997 formulation ! ! = 30 F(i,j,k) =ldf_c2d * ldf_c1d ! ! = 31 F(i,j,k,t)=F(local velocity and grid-spacing) ! ! time invariant coefficients: aht0 = 1/2 Ud*Ld (lap case) ! ! or = 1/12 Ud*Ld^3 (blp case) rn_Ud = 0.01 ! lateral diffusive velocity [m/s] (nn_aht_ijk_t= 0, 10, 20, 30) rn_Ld = 200.e+3 ! lateral diffusive length [m] (nn_aht_ijk_t= 0, 10) /