Abstract
Several theories and a mesoscale model were applied in the calculation of the effective roughness length Z over heterogeneous flat terrain having varying proportions of land and water. Rules based on terrain classification tended to give large values of Z, while the simple logarithmic areal average of local roughness lengths gave small values compared with the model output. The most recent theories were quite close to the model results. These theories were then used to produce a map of Z for 150 × 150 km2 grid squares over Finland, based on a detailed knowledge of land use and water coverage.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Quarterly Journal of the Royal Meteorological Society
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
