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.
If you input the road condition wet to the model, do you set a certain thickness of water film or how is that handled? Regards, Esben --- Den mån 2008-12-15 skrev Miguel Tremblay <[email protected]>: > Från: Miguel Tremblay <[email protected]> > Ämne: Re: [Metro-developers] SSI Codes question > Till: "Iain Russell" <[email protected]>, "METRo Developer Team" > <[email protected]> > Datum: måndag 15 december 2008 20.22 > Iain Russell wrote: > > Hi Miguel > > > > Can you comment on the physical reasoning for the > METRo model only distinguishing between dry > >and wet observed road conditions, i.e. not being > concerned about other > road conditions ? > >Is this something that you consider could be improved > or is it > considered adequate within > >the scale of features that the model is intended to > resolve ? > > > > Sure. > > The energy balance model of METRo needs to know if there is > water > (solid/liquid state will be determined by surface > temperature) present > at the surface. This will have an impact on the transfert > of energy. > > The model only needs to know wether the road is dry or wet > to determine > how this transfert is done. > > The same logic is applied for the road condition forecast > by METRo. The > physical model process everything and then, based on the > value of the > weather element and the quantity of water in the reservoir > (liquid/solid), the road condition is deduced. If you want > to have a > look a it, see the RODCON subroutine in lib_therm.f file. > > Miguel > > -- > 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 __________________________________________________________ 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
