CRTI Project # 02-0093RDCRTI Project # 02-0093RD

GENERAL OVERVIEW OF MSC’s GENERAL OVERVIEW OF MSC’s CONTRIBUTION to CRTI CONTRIBUTION to CRTI

COMPONENT 2COMPONENT 2

SStéphanetéphane Bélair Bélair

Jocelyn MailhotJocelyn Mailhot

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

MSC’s « URBANIZED » FORECASTING SYSTEM (under construction)

« Urbanized »Regional-15 kmGEM-variable

« Urbanized »Meso--scale 2.5 km

GEM-LAM

« Urbanized »Micro--scale 200 m

MC2-LAM

High-resMicroscale (CFD)

Partners

IC + LBC

IC + LBC

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

interfacestill TBD

LIST of PROJECTS

Name Description People

TEB Include 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 fields Develop 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 Turbulence Include 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 NWP Transfer 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 modeling Pellerin (RPN), Pelletier (RPN), Mailhot (RPN)

MUSE exps Field 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

WORK BREAKDOWN STRUCTURE

Meso- and off-line

Regional NWP

High-level management (Jean, Hogue) Scientific

management (Mailhot, Bélair)

MODELING DATABASES TRANSFERSMEASUREMENTS and

OBSERVATIONS

TEB

3D-turbulence

CFD

Surface fields

Anthropo. heat sources

MUSE

MUSE-II

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)

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)

SCHEDULE

2005 2006 2007NO

W

Case study OKC: TEB evaluation

MUSE case studySnow in TEB

Case study OKC: urban PBL

CFD

EN

D

Surface fields

Anthropogenic heat sources

CRTI prototype

Transfer 2.5 km

Transfer 15 km

Off-line system