1. CRTI Project # 02-0093RD GENERAL OVERVIEW OF MSC’s CONTRIBUTION to CRTI COMPONENT 2 Stéphane Bélair Jocelyn Mailhot

2. MAIN OBJECTIVES of OUR ACTIVITIES Improve the representation of urban processes in meso-  -scale and micro-  -scale atmospheric models in order to: Improve forecasting of the urban environment at the meso-  -scale Produce realistic representation of dispersion on the mesoscale Provide better initial and lateral boundary conditions for high-resolution dispersion models

3. MSC’s « URBANIZED » FORECASTING SYSTEM (under construction) « Urbanized » Regional-15 km GEM-variable « Urbanized » Meso-  -scale 2.5 km GEM-LAM « Urbanized » Micro-  -scale 200 m MC2-LAM High-res Microscale (CFD) Partners IC + LBC Operational Prototype Built areas are parameterized, i.e., we need TEB Urban surface databases Anthropogenic heat sources Built areas are resolved 1D (vertical) turbulence is sufficient 3D turbulence is required Off-line surface modeling At 100-200 m TEB Urban surfaces interface still TBD

4. LIST of PROJECTS NameDescriptionPeople TEBInclude representation of urban surfaces in MSC’s modeling and forecasting systems and study the impact on the boundary layer Lemonsu (RPN), Bélair (RPN), Tong (CMC-Devel.) Surface fieldsDevelop a methodology to generate urban surface databases that are required to run TEB Leroux (CMC-Emer), Lemonsu (RPN), Bélair (RPN), Trudel (CMC-Emer), Gauthier (CMC-Emer) Anthropogenic heat sources Create a database that will provide anthropogenic heat fluxes over every major city of Canada (and eventually North America) Benbouta (CMC-Emer), Bélair (RPN), Hogue (CMC) 3D TurbulenceInclude a 3D-turbulence scheme in MSC’s atmospheric models (required to run these models at microscale) and evaluate the impact on atmospheric mixing Pelletier (RPN), Mailhot (RPN) Meso-  -scale and off-line modeling Transfer the new technologies developed in this project to CMC’s forecasting systems (2.5 km and high-res off-line surface system) Tong (CMC-Devel.), Bélair (RPN), Lemonsu (RPN) Regional NWPTransfer the urban surface technology developed in CRTI to CMC’s 15-km operational regional weather forecasting system Pavlovic (CMC-AQ), Bélair (RPN), Mailhot (RPN) Micro-scale modeling (CFD) Develop MSC’s capabilities for building scale modelingPellerin (RPN), Pelletier (RPN), Mailhot (RPN) MUSE expsField experiments in Montreal to provide observational data for the verification of TEB in North American winter weather conditions Mailhot (RPN), Bélair (RPN), Lemonsu (RPN), Chagnon (CMC-E), Jean (CMC), Benjamin (Que. Region), Morneau (Que. Region) + more

5. WORK BREAKDOWN STRUCTURE Meso-  and off-line Regional NWP High-level management (Jean, Hogue) Scientific management (Mailhot, Bélair) MODELINGDATABASESTRANSFERS MEASUREMENTS and OBSERVATIONS TEB 3D-turbulence CFD Surface fields Anthropo. heat sources MUSE MUSE-II

6. PRESENTATIONS to FOLLOW 1.TEB (Lemonsu) 2.Urban surface databases (Leroux) 3.Anthropogenic heat sources (Benbouta) 4.3D Turbulence (Pelletier) 5.Experimental CFD modeling at RPN (Pellerin) 6.MUSE (Chagnon)

7. ISSUES General approach for the whole country ( implications for the construction of the databases ) GEM at 15 and 2.5 km, but MC2 at 200 m ( because 3D turbulence in MC2 – soon in GEM after introduction of a more appropriate vertical discretization ) Split of anthropogenic heat fluxes for TEB (vehicles, industries, heating) Finalize validation of 3D turbulence scheme Snow in TEB Urban surface databases: satellite or vector data, or hybrid? Availability of complete datasets for validation (e.g., OKC)

8. SCHEDULE 20052006 2007 NOW Case study OKC: TEB evaluation MUSE case study Snow in TEB Case study OKC: urban PBL CFD END Surface fields Anthropogenic heat sources CRTI prototype Transfer 2.5 km Transfer 15 km Off-line system