Thanks Miguel. This is very good to know. We are wondering what we could use for sand layers. My suspicion is of the three allowable materials (asphalt, crushed rock and cement) the closest to sand thermally would be the crushed rock. Would you concur?
Bryn -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Miguel Tremblay Sent: Wednesday, February 11, 2009 2:06 PM To: [email protected] Subject: Re: [Metro-developers] Configuration of layer types in METRo Bryn Jones wrote: > Hello. > > I am interested in confirming the valid layer types for input to METRo 3.2.1 > > Currently, we see on the Wikia site > (http://documentation.wikia.com/wiki/Layer_type_%28METRo%29) that: > > /The ground structure or roads used in METRo > <http://documentation.wikia.com/wiki/METRo> can be on of these three > types: / > > /1. //asphalt / > > /2. //crushed rock / > > /3. //cement / > > /All layers thickness in RWIS station configuration > <http://documentation.wikia.com/wiki/Input_station_%28METRo%29> file are > in meters. / > > /In the case of road, a thickness of 20 meters of sand is added as last > layer of material. / > > While old documentation for METRo 2 states: > > */The METRo 2.0 Documentation/* > > */Surface type /* > > The ground structure for which METRo makes a forecast can be composed by > three types: asphalt, gravel or concreted. > > All layers thickness in RWIS station configuration file are in meters. / > > */Asphalt (type 1) /* > > */Gravel (type 2) /* > > */Concreted (type 3) /* > > */Sand (type 4) /* > > /In the case of road, a thickness of 20 meters of sand is added as last > layer of material./// > > What would happen if the old input types were used in configuration > files instead of the current scheme? Would the model accept them, > choke, or substitute default values or equivalents? > > Thanks. > > **S. Bryn Jones** > Content Development Meteorologist > Content Division > Pelmorex - The Weather Network > Tel.: (905) 829-1159 ext.1401 > Mobile: (647) 204-6460 > [email protected] <mailto:[email protected]> > Hi Bryn, I though in the first place that it would be a trivial to answer this question. It turned out it was not. There is a default value for the surface layer in METRo: asphalt. If the string is not recognized as a valid value, which would be the case with "Sand", METRo use the default value for the surface, which is Asphalt. So if you use your old configuration with "sand" in one layer, the current version of METRo would treat this layer like asphalt. This is surely not a desirable behavior and, moreover, there is no error or warning message that is displayed. You have to dig into the code to know exactly what's going on. I do not know the exact reason why it is like that but I will correct this in the next release of METRo. When there will be an unknown string in any of the configuration file, METRo will raise an error with a verbose message explaining what exactly went wrong and where the errors occured. Best regards, 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 _______________________________________________ METRo-developers mailing list [email protected] https://mail.gna.org/listinfo/metro-developers
