Changes between Version 5 and Version 6 of doc/tec/lsm


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Timestamp:
Apr 4, 2016 2:46:39 PM (9 years ago)
Author:
maronga
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  • doc/tec/lsm

    v5 v6  
    88== Energy balance solver ==
    99The energy balance of the Earth's surface reads
     10{{{
     11#!Latex
    1012\begin{equation}
    1113   C_0 \dfrac{dT_0}{dt} = R_\mathrm{n} - H - LE - G
    12   \label{eq:energybalance}
    1314\end{equation}
    14 where
    15 {{{#!Latex $C_0$, $T_0$}}}
    16 are the heat capacity and radiative temperature of the surface skin layer, respectively. $R_\mathrm{n}$, $H$, $LE$, and $G$ are the net radiation, sensible heat flux, latent heat flux, and ground (soil) heat flux at the surface, respectively. $H$ is calculated as
     15}}}
     16where ''C'',,0,, and ''T'',,0,, are the heat capacity and radiative temperature of the surface skin layer, respectively. ''R'',,n,,, ''H'', ''LE'', and ''G'' are the net radiation, sensible heat flux, latent heat flux, and ground (soil) heat flux at the surface, respectively. ''H'' is calculated as
     17{{{
     18#!Latex
    1719\begin{equation}
    1820  H = - \rho\ c_\mathrm{p}\ \dfrac{1}{r_\mathrm{a}} ( \theta_1 - \theta_0 )
    1921\end{equation}
    20 where $\rho$ is the density of the air, $c_\mathrm{p} = \unit[1005]{J\ kg^{-1} K^{-1}}$ is the specific heat at constant pressure, $r_\mathrm{a}$ is the aerodynamic resistance, and $\theta_0$ and $\theta_1$ are the potential temperature at the surface and at the first grid level above the surface, respectively. $r_\mathrm{a}$ is calculated via Monin-Obukhov similarity theory, based on roughness lengths for heat and momentum and the assumption of a constant flux layer between the surface and the first grid level.
    21 
     22}}}
     23where ''ρ'' is the density of the air, ''c'',,p,, = 1005 J kg^-1^ K^-1^$ is the specific heat at constant pressure, ''r'',,a,, is the aerodynamic resistance, and ''θ'',,0,, and ''θ'',,1,, are the potential temperature at the surface and at the first grid level above the surface, respectively. ''r'',,a,, is calculated via Monin-Obukhov similarity theory, based on roughness lengths for heat and momentum and the assumption of a constant flux layer between the surface and the first grid level.
    2224
    2325== Soil model ==