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module bulk_flux_m |
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implicit none |
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contains |
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subroutine bulk_flux(tkt, tks, taur, dter, dser, t_int, s_int, ds_ns, dt_ns, & |
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u, t_ocean_1, s1, rain, hf, hlb, rnl, tau, rhoa, xlv, rf, dtime, rns) |
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use config_ocean_skin_m, only: jwarm, jcool, rain_effect |
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use Microlayer_m, only: Microlayer |
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use mom_flux_rain_m, only: mom_flux_rain |
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use Near_Surface_m, only: Near_Surface, depth |
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use therm_expans_m, only: therm_expans |
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real, intent(out):: tkt(:) |
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! thickness of cool skin (microlayer), in m |
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real, intent(out):: tks(:) |
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! thickness of mass diffusion layer (microlayer), in m |
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real, intent(out):: taur(:) ! momentum flux due to rain, in Pa |
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real, intent(out):: dter(:) |
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! Temperature variation in the diffusive microlayer, that is |
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! ocean-air interface temperature minus subskin temperature. In K. |
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real, intent(out):: dser(:) |
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! Salinity variation in the diffusive microlayer, that is ocean-air |
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! interface salinity minus subskin salinity. In ppt. |
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real, intent(out):: t_int(:) ! interface temperature, in K |
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real, intent(out):: s_int(:) ! interface salinity, in ppt |
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real, intent(inout):: ds_ns(:) |
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! "delta salinity near surface". Salinity variation in the |
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! near-surface turbulent layer. That is subskin salinity minus |
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! foundation salinity. In ppt. |
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real, intent(inout):: dt_ns(:) |
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! "delta temperature near surface". Temperature variation in the |
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! near-surface turbulent layer. That is subskin temperature minus |
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! foundation temperature. (Can be negative.) In K. |
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real, intent(in):: u(:) |
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! Wind speed relative to the sea surface, i. e. taking current |
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! vector into account. In m s-1. |
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real, intent(in):: t_ocean_1(:) ! input sea temperature, at depth_1, in K |
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real, intent(in):: S1(:) ! salinity at depth_1, in ppt |
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real, intent(in):: rain(:) |
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! rain mass flux, averaged on a timestep, in kg m-2 s-1 |
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real, intent(in):: hf(:) |
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! turbulent part of sensible heat flux, positive upward, in W m-2 |
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real, intent(in):: hlb(:) |
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! latent heat flux at the surface, positive upward (W m-2) |
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real, intent(in):: rnl(:) |
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! net longwave radiation, positive upward, in W m-2 |
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real, intent(in):: tau(:) |
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! wind stress at the surface, turbulent part only, in Pa |
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real, intent(in):: rhoa(:) ! density of moist air (kg / m3) |
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real, intent(in):: xlv(:) ! latent heat of evaporation (J / kg) |
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real, intent(in):: rf(:) |
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! sensible heat flux at the surface due to rainfall, in W m-2, |
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! positive upward |
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real, intent(in):: dtime ! time step, in s |
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real, intent(in):: rns(:) ! net downward shortwave radiation, in W m-2 |
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! Local: |
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real al(size(t_ocean_1)) ! water thermal expansion coefficient (in K-1) |
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real dels(size(t_ocean_1)), null_array(size(t_ocean_1)) |
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integer iter |
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real t_subskin(size(t_ocean_1)) ! subskin temperature, in K |
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real s_subskin(size(t_ocean_1)) ! subskin salinity, in ppt |
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real, parameter:: fxp = 1. - (0.28 * 0.014 & |
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+ 0.27 * 0.357 * (1. - exp(- depth / 0.357)) & |
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+ .45 * 12.82 * (1.- exp(- depth / 12.82))) / depth |
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! underflow ! fxp = 1. - (0.28 * 0.014 * (1. - exp(- depth / 0.014)) & |
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! Soloviev solar absorption profile |
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! H. Bellenger 2016 |
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real tau_with_min(size(t_ocean_1)) |
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! modified wind stress, avoiding very low values |
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real, parameter:: tau_0 = 1e-3 ! in N m-2 |
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!------------------------------------------------------------------- |
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if (rain_effect) then |
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taur = mom_flux_rain(u, rain) |
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else |
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if (jwarm .or. jcool) null_array = 0. |
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taur = 0. |
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end if |
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if (jwarm .or. jcool) tau_with_min = tau + tau_0 * (1. - exp(- tau_0 / tau)) |
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if (Jwarm) then |
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if (rain_effect) then |
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call Near_Surface(al, t_subskin, s_subskin, ds_ns, dt_ns, & |
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tau_with_min, taur, hlb, rhoa, xlv, dtime, t_ocean_1, s1, rain, & |
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q_pwp = fxp * rns - (hf + hlb + rnl + rf)) |
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else |
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call Near_Surface(al, t_subskin, s_subskin, ds_ns, dt_ns, & |
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tau_with_min, taur, hlb, rhoa, xlv, dtime, t_ocean_1, s1, & |
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rain = null_array, q_pwp = fxp * rns - (hf + hlb + rnl)) |
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end if |
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else |
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if (Jcool) al = therm_expans(t_ocean_1) |
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t_subskin = t_ocean_1 |
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s_subskin = s1 |
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end if |
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if (Jcool) then |
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! First guess: |
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tkt = 0.001 |
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tks = 5e-4 |
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do iter = 1, 3 |
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! Cool skin |
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dels = rns * (0.065 + 11. * tkt - 6.6e-5 / tkt & |
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* (1. - exp(- tkt / 8e-4))) ! equation 16 Ohlmann |
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if (rain_effect) then |
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call Microlayer(dter, dser, tkt, tks, hlb, tau_with_min, & |
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s_subskin, al, xlv, taur, rf, rain, & |
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qcol = rnl + hf + hlb - dels) |
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else |
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call Microlayer(dter, dser, tkt, tks, hlb, tau_with_min, & |
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s_subskin, al, xlv, taur, rf = null_array, & |
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rain = null_array, qcol = rnl + hf + hlb - dels) |
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end if |
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end do |
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else |
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tkt = 0. |
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tks = 0. |
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dter = 0. |
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dser = 0. |
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end if |
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t_int = t_subskin + dter |
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s_int = s_subskin + dser |
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end subroutine bulk_flux |
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end module bulk_flux_m |