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Model simulation of dye dispersion

Model simulation of dye dispersion. Bob Houghton, LDEO Changsheng Chen & Qichun Xu, Umass D. Field Experiment GLOBEC III May 1999. Pre-injection Cross tidal front Hydrographic sections. Observations. Temperature variation of dye patch (seasonal heating ~0.034 o C/day).

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Model simulation of dye dispersion

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  1. Model simulation of dye dispersion Bob Houghton, LDEO Changsheng Chen & Qichun Xu, Umass D

  2. Field Experiment GLOBEC III May 1999

  3. Pre-injection Cross tidal front Hydrographic sections

  4. Observations

  5. Temperature variation of dye patch (seasonal heating ~0.034 oC/day)

  6. Inferred cross-front velocity v=(dT/dt)/(dT/dy)

  7. ` 4km grid 2km grid

  8. 0.5 km grid 0.25 km grid

  9. From simulated model calculations

  10. Data assimilation from Scanfish surveys of dye patch

  11. Simulated 0.5 km Assimilation 0.5 km Trajectory of a near-surface particle Trajectory of a near-bottom particle Trajectory of the center of the vertically averaged model dye concentration.

  12. Assimilation Simulated

  13. Observed Simulated Assimilation with T and S 1: 3:59 GMT, 23 May 2: 11: 43 GMT, 23 May 3: 15:22 GMT, 23 May 4: 19:24 GMT, 23 May 5: 21:34 GMT, 23 May 6: 00:53 GMT, 25 May 6 5 2 1 3 4

  14. Observed dye patch temperature Patch temperature from assimilation model

  15. Data assimilation

  16. Integrated dye on 30 m Temperature 5-23 6000 5-23 18000 B A 5-24 18000 5-26 18000 D C

  17. Integrated dye on 30 m density 5-23 18000 5-23 6000 B A 5-26 18000 5-24 18000 C D

  18. Diabatic event 600 hr 800 hr o o B A 1200 hr 1000 hr o o C D

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