Thanks Miguel! That answered my question. Ok, a special case: If there is not enough data to do the coupling phase and the surface is wet. Does the model start with 0 mm of water? Regards, Esben
--- Den tis 2008-12-16 skrev Miguel Tremblay <[email protected]>: > Från: Miguel Tremblay <[email protected]> > Ämne: Re: [Metro-developers] SSI Codes question > Till: [email protected] > Kopia: "METRo Developer Team" <[email protected]> > Datum: tisdag 16 december 2008 16.52 > 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] __________________________________________________________ Låna pengar utan säkerhet. Jämför vilkor online hos Kelkoo. http://www.kelkoo.se/c-100390123-lan-utan-sakerhet.html?partnerId=96915014 _______________________________________________ METRo-developers mailing list [email protected] https://mail.gna.org/listinfo/metro-developers
