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Numerical Modelling of SI m PS on

Numerical Modelling of SI m PS on. Hans Burchard Baltic Sea Research Institute Warnemünde Bolding & Burchard Hyrodynamics hans.burchard@io-warnemuende.de. What is SIPS ? Google says: Social Inclusion Partnerships Structural Insulated Panels Signal Processing Systems

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Numerical Modelling of SI m PS on

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  1. Simpson Retirement Conference Numerical Modelling of SImPSon Hans Burchard Baltic Sea Research Institute Warnemünde Bolding & Burchard Hyrodynamics hans.burchard@io-warnemuende.de

  2. Simpson Retirement Conference What is SIPS ? Google says: Social Inclusion Partnerships Structural Insulated Panels Signal Processing Systems Secure Internet Processing Services Statistically Improbable Phrases Schweizerische Interessengemeinschaft für Polio-Spätfolgen Società Italiana di Psicologia Side Impact Protection System Student Intellectual Property Society ... Strain Induced Periodic Stratification (search for 'sips john simpson bangor')

  3. Simpson Retirement Conference Tidal straining during ebb tide Simpson et al. 1990

  4. Simpson Retirement Conference Tidal asymmetry (schematically) Jay and Musiak 1994

  5. Simpson Retirement Conference Tidal asymmetry (numerically) Burchard and Baumert, 1998

  6. Simpson Retirement Conference Tidal straining and estuarine turbidity maxima Animation by Manuel Ruiz Burchard et al. 2004

  7. Simpson Retirement Conference Strain-induced periodic stratification (SIPS) (in Liverpool Bay, temperature & salinity) Rippeth et al. (2001), Burchard (2002), Simpson et al. (2002)

  8. Simpson Retirement Conference Strain induced periodic stratification (SIPS) (in Liverpool Bay, dissipation rate) Rippeth et al. (2001), Burchard (2002), Simpson et al. (2002)

  9. Simpson Retirement Conference A simple model for SIPS See also Sharples and Simpson (1995)

  10. Simpson Retirement Conference Scaling of SIPS equations See also Baumert and Radach (1992)

  11. Simpson Retirement Conference Two independent SIPS parameters

  12. Simpson Retirement Conference Non-dimensional SIPS equations

  13. Simpson Retirement Conference Measure for SIPS intensity See also Simpson and Bowers (1981)

  14. Simpson Retirement Conference Example calculation for idealised SIPS (Pg=0.2, Si=0.01) Dimensionless relative buoyancy Potential energy anomaly (dimless) Dimensionless time Dimensionless time

  15. Simpson Retirement Conference Maximum potential density anomaly as function of Siand Pg ~  No SIPS Pg Si red: Pg · Si = 0.002

  16. Simpson Retirement Conference Suggested condition for SIPS:

  17. Simpson Retirement Conference • What we have ignored: • Varying sea level elevation • Non-zero mean surface slope • Varying horizontal density gradient • Bottom roughness to depth ratio • Earth rotation • Surface heat flux • Solar radiation • Surface momentum flux • Surface waves • Internal waves • Each of these processes would give us • at least one more dimensionless number • Conclusion: The real world is too complex for us to understand.

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