 Timestamp:
 Jul 15, 2010 8:37:45 AM (13 years ago)
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 palm/trunk/DOC/misc
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palm/trunk/DOC/misc/cloud_physics.tex
r413 r543 42 42 Rieke Heinze 43 43 \linebreak 44 1 4.12.200944 15.07.2010 45 45 \end{center} 46 46 … … 137 137 \frac{\partial \left(\overline u_{j} \overline q\right)}{\partial x_{j}} 138 138 \frac{\partial\, \overline{u_{j}^{'} q^{'}}}{\partial x_{j}} 139 +\left(\frac{\partial \overline q}{\partial t}\right)_{\mathrm{ RAD}}139 +\left(\frac{\partial \overline q}{\partial t}\right)_{\mathrm{PREC}} 140 140 \label{eq:total_water} 141 141 \end{eqnarray} … … 348 348 \left(\frac{\partial \overline q}{\partial t}\right)_{\mathrm{PREC}} & = & 349 349 \begin{cases} 350 \left(\overline q_{l}\overline q_{l_{\mathrm{crit}}}\right) \cdot\tau &350 \left(\overline q_{l}\overline q_{l_{\mathrm{crit}}}\right)/ \tau & 351 351 \quad\overline q_{l} > \overline q_{l_{\mathrm{crit}}} \\ 352 352 0 & \quad\overline q_{l} \leq \overline q_{l_{\mathrm{crit}}} … … 356 356 The precipitation leaves the grid volume immediately if the threshold of the liquid water content 357 357 $\overline q_{l_{\mathrm{crit}}}=0.5\,\mathrm{g/kg}$ is exceeded. Hence, evaporation of the rain drops does not occur. 358 $\tau$ is a time scale with a value of 0.001\,s.358 $\tau$ is a retarding time scale with a value of 1000\,s. 359 359 \newline 360 360 The influence of the precipitation on the temperature is as follows:
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