# Presentation: 205155

## Modeling & Monitoring / Data Analysis

- Joint Session
- RPO National Workgroup Meeting
- December 3, 2002, 1:00 - 3:00
- Crown Plaza, Dallas, TX

## Session Format

- Guided, open discussion
- Focused on, but not limited to list of topics
- How we can/do use each others information
- Session notes will be sent to Discussion Group Leads within a week
- 10 minute break at 1:55, if needed

## Discussion Topics

- Monitor to model comparison
- Species mapping
- Spatial representation
- Temporal issues
- Supplemental measurements
- Unexplained fine mass
- Base year discussion
- Open discussion / Q&A

## Model to Monitor Comparison

- Species mapping
- Base inventories are speciated in the emissions processing steps and are maintained through the photochemical modeling
- Course/primary particles, aerosols, gasses
- Specific species that are not commonly measured
- Speciation is dependent on chemical mechanism
- Examples provided by Kirk Baker follow

## Speciation for ModelsFull CB4 = CMAQ, CAMx-M4, PMCAMx                Micro-CB4 = REMSADv7

## Model to Monitor Comparison

- Species mapping
- Photochemical model outputs are specific fields on an hourly basis.
-  How modeled and monitored species are compared depends on the specific specie(s) of interest
- Examples provided by Kirk Baker follow

## Slide 7

## Model to Monitor Comparison

- Species mapping
- Current questions
- How to standardize species mapping
- Are composite species being compared correctly
- Are there monitoring (modeling) nuances that modeling (monitoring) should know
- Are there supplemental observations available for comparison with non-standard species
- Can modeling results be used to help make decisions on supplemental monitoring or special studies

## Model to Monitor Comparison

- Spatial representation
- Photochemical model output provides a value for a grid cell of some size
- 36km x 36km 	1296 km2
- 12km x 12km	144 km2
- 4km x 4 km		16 km2
- Methods include comparing monitored data to the value of the grid cell it is within, averages of surrounding grid cells, weighting schemes, etc.

## Model to Monitor Comparison

- Spatial representation
- Current questions
- What spatial extent are monitors representing
- Urban v. rural
- Geographic differences
- Types of monitors
- Differences between species
- Seasonal considerations
- What are the best methods for comparing spatial information (modeled) with point measurements

## Model to Monitor Comparison

- Temporal issues
- Photochemical model output is hourly
- Monitored data varies from continuous to 24-hour integrated samples taken every few days
- Diurnal patterns help diagnose model performance and model representation of real world physical and chemical processes

## Model to Monitor Comparison

- Temporal issues
- Unrealistic to maintain a significant network of continuous, speciated monitors at this time
- Modeling could utilize targeted short term supplemental measurements of continuous standard and non-standard measurements
- Can preliminary model results be used to identify areas of interest such as chemical gradients, flow corridors, diurnal, seasonal, or specie specific areas of interest, for targeted supplemental monitoring
- What can be learned from BRAVO, SAMI, OZZIE, etc.

## Supplemental Measurements

- Are additional field studies being considered
- Is it plausible to plan for short term, targeted continuous monitoring projects
- What is available or planned for information above the surface level
- Where and when would supplemental measurements make the most sense

## Unexplained Fine Mass

- What is it?
- How to account for in model to monitor comparison
- Seasonality?
- Diurnal pattern?
- Can modeled moisture fields be of help

## Base Year Discussion

- Current thought - 2002
- Most recent EI possible for regulatory modeling
- Allows EI to focus efforts
- More ambient data available (relatively)
- Lacks new monitoring information currently coming on line
- Scheduled time frame may be getting shortened
- Any thoughts?

## Open Discussion / Q&A