| 141 | }}} |
| 142 | |---------------- |
| 143 | {{{#!td style="vertical-align:top" |
| 144 | [=#dp_external '''dp_external'''] |
| 145 | }}} |
| 146 | {{{#!td style="vertical-align:top" |
| 147 | L |
| 148 | }}} |
| 149 | {{{#!td style="vertical-align:top" |
| 150 | .F. |
| 151 | }}} |
| 152 | {{{#!td |
| 153 | External pressure gradient switch.\\\\ |
| 154 | This parameter is used to switch on/off an external pressure gradient as driving force. The external pressure gradient is controlled by the parameters [#dp_smooth dp_smooth], [#dp_level_b dp_level_b] and [#dpdxy dpdxy].\\\\ |
| 155 | Note that '''dp_external''' = ''.T.'' requires [#conserve_volume_flow conserve_volume_flow] = ''.F.''. It is normally recommended to disable the Coriolis force by setting [#omega omega] = ''0.0''. |
| 156 | }}} |
| 157 | |---------------- |
| 158 | {{{#!td style="vertical-align:top" |
| 159 | [=#dp_smooth '''dp_smooth'''] |
| 160 | }}} |
| 161 | {{{#!td style="vertical-align:top" |
| 162 | L |
| 163 | }}} |
| 164 | {{{#!td style="vertical-align:top" |
| 165 | .F. |
| 166 | }}} |
| 167 | {{{#!td |
| 168 | Vertically smooth the external pressure gradient using a sinusoidal smoothing function.\\\\ |
| 169 | This parameter only applies if [#dp_external dp_external] = ''.T.''. It is useful in combination with [#dp_level_b dp_level_b] >> 0 to generate a non-accelerated boundary layer well below dp_level_b. |
| 170 | }}} |
| 171 | |---------------- |
| 172 | {{{#!td style="vertical-align:top" |
| 173 | [=#dp_level_b '''dp_level_b'''] |
| 174 | }}} |
| 175 | {{{#!td style="vertical-align:top" |
| 176 | R |
| 177 | }}} |
| 178 | {{{#!td style="vertical-align:top" |
| 179 | 0.0 |
| 180 | }}} |
| 181 | {{{#!td |
| 182 | Lower limit of the vertical range for which the external pressure gradient is applied (in m).\\\\ |
| 183 | This parameter only applies if [#dp_external dp_external] = ''.T.''. It must hold the condition zu(0) <= '''dp_level_b''' <= zu([#nz nz]). It can be used in combination with [#dp_smooth dp_smooth] = ''.T.'' to generate a non-accelerated boundary layer well below '''dp_level_b''' if '''dp_level_b''' >> 0.\\\\ |
| 184 | Note that there is no upper limit of the vertical range because the external pressure gradient is always applied up to the top of the model domain. |