Changes between Version 240 and Version 241 of doc/app/initialization_parameters
- Timestamp:
- Apr 23, 2014 2:38:07 PM (11 years ago)
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doc/app/initialization_parameters
v240 v241 264 264 }}} 265 265 {{{#!td 266 Parameter to choose large scale forcing from an external file. By means of '''large_scale_forcing''' = ''.T.'' the time-dependent surface heat flux '''shf''', surface water flux '''qsws''', surface temperature '''pt_surface''', surface humidity and surface pressure '''surface_pressure''' as well as vertical profiles of the geostrophic wind components '''ug''' and '''vg''', the large scale vertical subsidence profile '''w_subs''', the horizontal large scale advection tendencies of temperature '''td_lsa_lpt''' and humidity '''td_lsa_q''' and the large scale subsidence tendencies of temperature '''td_sub_lpt''' and humidity '''td_sub_q''' are provided in the simulation. An example can be found [../examples/ nudginghere].\\266 Parameter to choose large scale forcing from an external file. By means of '''large_scale_forcing''' = ''.T.'' the time-dependent surface heat flux '''shf''', surface water flux '''qsws''', surface temperature '''pt_surface''', surface humidity and surface pressure '''surface_pressure''' as well as vertical profiles of the geostrophic wind components '''ug''' and '''vg''', the large scale vertical subsidence profile '''w_subs''', the horizontal large scale advection tendencies of temperature '''td_lsa_lpt''' and humidity '''td_lsa_q''' and the large scale subsidence tendencies of temperature '''td_sub_lpt''' and humidity '''td_sub_q''' are provided in the simulation. An example can be found [../examples/lsf here].\\ 267 267 268 268 '''large_scale_forcing''' = ''.T.'' requires [#humidity humidity] = .T.. It is not implemented for [#ocean ocean] runs and non cyclic lateral boundary conditions. It is possible to drive the simulations either by means of surface fluxes or by means of prescribed surface values for temperature and humidity. \\ … … 322 322 Parameter to choose nudging. Nudging is a relaxation technique which adjusts the large-eddy simulation to a given, larger scale flow situation. It can for example be used to simulate an observed situation. Further information can be found [../../tec/nudging here]. \\\\ 323 323 324 With '''nudging''' = ''.T.'', additional tendencies are calculated for the prognostic variable u, v, pt and q. It requires [#humidity humidity] = .T. as well as [#large_scale_forcing large_scale forcing] = .T.. So far, it is not implemented for [#ocean ocean] runs and non cyclic lateral boundary conditions. An example can be found [../examples/ nudginghere]. \\\\324 With '''nudging''' = ''.T.'', additional tendencies are calculated for the prognostic variable u, v, pt and q. It requires [#humidity humidity] = .T. as well as [#large_scale_forcing large_scale forcing] = .T.. So far, it is not implemented for [#ocean ocean] runs and non cyclic lateral boundary conditions. An example can be found [../examples/lsf here]. \\\\ 325 325 326 326 Additionally, this mode requires the input file [../iofiles#NUDGING_DATA NUDGING_DATA]. This file contains profile information at several time steps about the relaxation time scale tau and the prognostic variables u, v, w, pt, q which must be provided by a larger scale model or by measurements.