Changes between Version 5 and Version 6 of doc/tec/lsm
- Timestamp:
- Apr 4, 2016 2:46:39 PM (9 years ago)
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doc/tec/lsm
v5 v6 8 8 == Energy balance solver == 9 9 The energy balance of the Earth's surface reads 10 {{{ 11 #!Latex 10 12 \begin{equation} 11 13 C_0 \dfrac{dT_0}{dt} = R_\mathrm{n} - H - LE - G 12 \label{eq:energybalance}13 14 \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 }}} 16 where ''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 17 19 \begin{equation} 18 20 H = - \rho\ c_\mathrm{p}\ \dfrac{1}{r_\mathrm{a}} ( \theta_1 - \theta_0 ) 19 21 \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 }}} 23 where ''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. 22 24 23 25 == Soil model ==