Esben Almqvist wrote: > Hi Miguel and Iain! > > So the amount of water on the road is not passed from the coupling > phase to the forecast model? Wouldn't that be an important parameter? > It will determine how much evaporation is required to get the road > dry.
The RWIS station does not have this information, so it cannot be used in the input. However, the quantity of water on the road is computed in the coupling phase (see below) and it is then passed to the model. > > If you input the road condition wet to the model, do you set a > certain thickness of water film or how is that handled? The starting amount of water in both reservoir is set to zero (0.0) at the beginning of the coupling phase. It is then derived based on the thermic balance and the presence of precipitation. See file coupla.f, lines 263 and 264 (look for "ER1" and "ER2" variables, those 2 are the water reservoirs for liquid/solid, respectively): http://svn.gna.org/viewcvs/metro/metro/trunk/src/model/coupla.f?rev=242&view=markup The presence of water is used for the computation of humidity at the surface (SRFHUM) and vapor fluxes (RODCON). Those 2 subroutine can be find in lib_therm.f file: http://svn.gna.org/viewcvs/metro/metro/trunk/src/model/lib_therm.f?rev=242&view=markup Does it answer your questions? Best regards, -- Miguel Tremblay Physicien - Physicist Centre météorologique canadien - Canadian meteorological centre (CMC) Environnement Canada - Environment Canada http://www.ec.gc.ca/ 2121 Trans-Canada N. Suite 228 Téléphone/Phone: 514-421-4729 Dorval, Québec Fax: 514-421-4679 CANADA H9P 1J3 courriel/email: [email protected] _______________________________________________ METRo-developers mailing list [email protected] https://mail.gna.org/listinfo/metro-developers
