Developing a Vision for the Next-Generation Air Quality Modeling Tools: A Few Suggestions Mike Moran Air Quality Research Division, Environment Canada,

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Presentation transcript:

Developing a Vision for the Next-Generation Air Quality Modeling Tools: A Few Suggestions Mike Moran Air Quality Research Division, Environment Canada, Toronto, Ontario, Canada 2014 CMAS Conference Chapel Hill, North Carolina Oct. 2014

DRAFT – Page 2 – June 30, 2016 Looking backward: What are the shortcomings and limitations of current AQ modelling systems? What lessons can be learned from past model development efforts? Looking forward: What are the issues to be addressed and the questions to be answered? (e.g., population exposures, impact of climate change, …) What capabilities does the model need to have? (forecasts? hindcasts? source attribution? grid nesting? adjoint?) Vision and Scope

DRAFT – Page 3 – June 30, 2016 Desirable Features: Science Ability to accommodate new science Support for 2-way meteorology/chemistry interactions (e.g., in-line model) Support for chemical data assimilation (may require support for a simplified or reduced-form model) “Instrumented” model (to diagnose and understand model behaviour and responses)

DRAFT – Page 4 – June 30, 2016 Desirable Features: Numerics Future computing environments are likely to be massively parallel (  fine and coarse grain parallelization?) Support for multiple spatial scales (i.e., global vs. regional vs. urban) and grid nesting Consideration of conservation properties and order of error in fundamental choices regarding horizontal and vertical coordinates, grid discretization, time solver, operator sequence, advection scheme, …

DRAFT – Page 5 – June 30, 2016 Desirable Features: Flexibility Ability to add new species (e.g., selected toxics) Ability to choose different parameterizations of same process Ability to choose different numerical techniques Ability to choose different PM size distribution representations (modal vs. sectional) Ability to include/exclude chemical and physical processes (e.g., coagulation, horizontal diffusion, …)