Modeling Europe with CAMx for Phase II of the Air Quality Model Evaluation International Initiative (AQMEII)

摘要

This report for CRC Project A 75-2 discusses model sensitivity analyses to investigate the influence of input data, assumptions and uncertainties on model performance using the CAMx application described in the report CRC-A-75-1. Multiple simulations were conducted to identify the role played by different input data and assumptions. Alternate inputs and model configurations tested include BC's from alternate global models, meteorological conditions from WRF, reduced MEGAN isoprene emissions, modified vertical distributions for fire and shipping emissions, and alternate deposition and chemistry schemes. Model performance for January and July 2006 exhibited under-estimation trends for all pollutants both in winter and summer, except for SO2. SO2 generally had little bias although some over-estimation occurred at coastal locations and this was attributed to incorrect vertical distribution of emissions from marine vessels.