REMSAD Simulation of the BRAVO Tracer Experiment Michael G. Barna Cooperative Institute for Research in the Atmosphere Colorado State University Fort Collins, CO 10 October 2002

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REMSAD Simulation of the BRAVO Tracer
ExperimentMichael G. BarnaCooperative
Institute for Research in the AtmosphereColorado
State UniversityFort Collins, CO10 October 2002
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Primer on BRAVO Modeling
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Tracer Release Rates Phase 1 (July 5
September 16)
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Tracer Release Rates Phase 2 (Sept. 17
October 30)
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Tracer Release Sites and 6 hr Receptors
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Dispersion is a Lagrangian Process
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And a Three-Dimensional One
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Contour Maps of the Four Tracers
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Eagle Pass 12 Hour Timing Tracer at Marathon
(PTCH)
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Eagle Pass 24 Hour Timing Tracer at Monahans
(PDCB)
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Eagle Pass 24 Hour Timing Tracer at Big Bend
(PDCB)
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Eagle Pass Continuous Tracer at Persimmon Gap
(PDCH)
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Eagle Pass Continuous Tracer at Big Bend (PDCH)
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San Antonio Tracer at Fort Stockton (PDCB)
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Predicted and Observed Average Tracer
Concentrations
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Correlation Coefficient
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Observed and Predicted PDCH All monitors
y 0.203 x 0.361 R 0.25
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Conclusions

• Some skill in replicating timing (but often not
  magnitude) of the 12 hr and 24 hr Eagle Pass
  timing tracers
• Measured and predicted tracer concentration from
  Big Brown (PPCH) low (lt 1 ppqV)
• Model tends to over-predict average
  concentrations at southern monitors
• Correlation coefficients 0.05 0.65

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