Brief evaluation of REMAD and CMAQ for east Texas tracers

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Brief evaluation of REMAD and CMAQ for east Texas
tracers

• Mark Green, DRI
• Model results from Christian Seigneur and Betty
  Pun- AER (CMAQ and REMSAD), and Mike Barna- CIRA
  (REMSAD)

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Methodology

• Evaluation used 6-hour tracer data and model
  predictions for two 10-day periods where tracer
  data was sequestered August 15-25, 1999 October
  5-15, 1999

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(No Transcript)
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BRAVO Study Tracer Release Monitoring Locations
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CMAQ
CMAQ
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Northeast Texas tracer and Observed S
Northeast Texas tracer
August- Particulate S and observed iPPCH
Observed S
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12km CMAQ and 36km REMSAD NE Texas tracer
obs/preds time series for sequestered period
Look at CMAQ first
Obs
Preds
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12km CMAQ and 36km REMSAD NE Texas tracer
obs/preds time series for sequestered period
Now REMSAD
Obs
Preds
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Tracer Release from Big Brown, 22-Aug-1999 0000
GMT
CMAQ-12km
REMSAD-36km
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Obs
CMAQ 36 km
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From AER
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Model performance summary statistics Northeast
Texas tracer, August episode
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Model performance summary statistics Eagle Pass
tracer, August episode
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Houston tracer and observed S
Houston tracer
October- Particulate S and observed PTCH
Observed S
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12km CMAQ and 36km REMSAD Houston tracer
obs/preds time series for sequestered period
Look at CMAQ first
Obs
Preds
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12km CMAQ and 36km REMSAD Houston tracer
obs/preds time series for sequestered period
Now REMSAD
Obs
Preds
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CMAQ 12 and 4 km simulation PTCH (Houston
Tracer) October 12
6-hour average starting 19 GMT
22 GMT
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REMSAD PTCH
REMSAD vs. CMAQ 36 km vs. 12 km PTCH (Houston
Tracer) October 12
36 km
12 km
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Obs
CMAQ 36 km
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From AER
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AER summary of CMAQ tracer transport

• In the 36 km simulations, tracer plumes still
  miss monitoring sites at and near Big Bend on
  some days
• In both the 36 and 4 km simulations for August,
  the PPCH plumes are too far East
• In both the 36 and 4 km simulations for October,
  the PTCH plumes are too far South
• 36 km simulations bring plume a lot closer to Big
  Bend than 4 km simulations

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Model performance summary statistics northeast
Texas tracer, August episode
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Model performance summary statistics Eagle Pass
tracer, October episode
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SO4 at K-BAR, July-October 1999
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Total Sulfur at K-BAR, July-October 1999
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From AER