1 / 34

How I Spent My Summer Vacation

How I Spent My Summer Vacation. By: Dylan Boyd High School Math Teacher and Harvard RET Participant. Modeling the Across North America Tracer Experiment (ANATEX) for purposes of evaluating the accuracy of the STILT atmospheric particle transport model. Who cares if STILT’s accurate or not?.

miyoko
Télécharger la présentation

How I Spent My Summer Vacation

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. How I Spent My Summer Vacation By: Dylan Boyd High School Math Teacher and Harvard RET Participant

  2. Modeling the Across North America Tracer Experiment (ANATEX) for purposes of evaluating the accuracy of the STILT atmospheric particle transport model

  3. Who cares if STILT’s accurate or not? • Environmental applications • Ecology issues • Pollution issues • Emergency applications • Military applications

  4. What is STILT?

  5. What is STILT?

  6. What is STILT? • Transport Model

  7. What is STILT? • Transport Model

  8. What is STILT? • Lagrangian • Transport Model

  9. What is STILT? • Lagrangian • Transport Model

  10. What is STILT? • Stochastic • Lagrangian • Transport Model

  11. What is STILT? • Stochastic • Lagrangian • Transport Model

  12. What is STILT? • Stochastic • Time • Inverted • Lagrangian • Transport Model

  13. What is ANATEX? • Across North America Tracer Experiment (1987) • Three tracers released from two locations • 33 releases over three months • 77 ground sample sites • 5 towers • 12 “remote” sites

  14. ANATEX Tracer Release • Perfluorocarbons (PMCH, PTCH, oPDCH) • Inert • Nondepositing • Nontoxic • High degree of analytical detection sensitivity • Used previously in CAPTEX, and subsequently in ETEX and TRANSALP

  15. ANATEX Tracer Sampling • Programmable Atmospheric Tracer Sampler (PATS) • Constant mass flow pump draws air through sample tubes packed with adsorbent • Sample tubes were desorbed by resistance heating of the tubes • Analyses performed by gas chromatography-electron capture

  16. European Tracer Experiment (ETEX) • Two releases • 170 ground sampling sites • Sampling period of 72 hours

  17. Scientific importance of ANATEX

  18. Scientific importance of ANATEX

  19. My Work • Simulate the ANATEX experiment with the STILT model • Render the ANATEX data and the STILT output into comparable formats • Perform analyses to evaluate the modeling accuracy of STILT

  20. My Work • Simulate the ANATEX experiment with the STILT model • Render the ANATEX data and the STILT output into comparable formats • Perform analyses to evaluate the modeling accuracy of STILT

  21. My Work • Simulate the ANATEX experiment with the STILT model • Render the ANATEX data and the STILT output into comparable formats • Perform analyses to evaluate the modeling accuracy of STILT

  22. My Work • Simulate the ANATEX experiment with the STILT model • Render the ANATEX data and the STILT output into comparable formats • Perform analyses to evaluate the modeling accuracy of STILT

  23. My Work • Simulate the ANATEX experiment with the STILT model • Render the ANATEX data and the STILT output into comparable formats • Perform analyses to evaluate the modeling accuracy of STILT

  24. Dynamic Grid Sizing

  25. Dynamic Grid Sizing

  26. Dynamic Grid Sizing

  27. Dynamic Grid Sizing

  28. Shifted Plumes Observed Plume Simulated Plume *note different concentration scales (simulation should be multiplied by factor of 10!!!)

  29. log10([fL/L]) log10([fL/L]) Results

  30. log10([fL/L]) log10([fL/L]) Results

  31. log10([fL/L]) log10([fL/L]) Results

  32. log10([fL/L]) log10([fL/L]) Results

  33. 1:1 line Regression line

  34. Closing Remarks

More Related