Performance of the UAM-V and CALGRID photochemical models for an ozone episode in Canadian lower Fraser valley
- Institute for Chemical Process and Environmental Technology, Ottawa, Ontario (Canada)
Two widely used photochemical models, UAM-V and CALGRID, have previously been used to simulate an ozone episode in the Canadian Lower Fraser Valley (LFV) which includes Vancouver, British Columbia, and the northern part of Washington State. Results generated by the two models are compared based on the spatial and temporal variations of ozone, its precursors and important intermediates. The modeled ozone, NO{sub x} and CO fields are also compared against the ambient measurement of these species. Generally speaking, both models underpredicted ozone concentrations in the modeling domain when the base case emissions inventory was used. Although the model performance can be improved by modifying the emissions inventory, our recent inventory validation exercises constrain the extent of inventory adjustment. Reasons responsible for the performance of the two models are explored in the paper. In addition to the possible deficiencies in the emissions inventory, differences in treatment of atmospheric chemistry in the two models and their consequences are also discussed. Several improvements to the models and to the modeling process are suggested in order to achieve better modeling results in the LFV.
- OSTI ID:
- 466218
- Report Number(s):
- CONF-9606185-; TRN: 96:005931-0169
- Resource Relation:
- Conference: 5. international conference on atmospheric sciences and applications to air quality, Seattle, WA (United States), 18-20 Jun 1996; Other Information: PBD: 1996; Related Information: Is Part Of The 5th international atmospheric sciences and applications to air quality conference; PB: 322 p.
- Country of Publication:
- United States
- Language:
- English
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