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Analysis of GOM Oscillator and MAB EOF: Coarse and Fine Grid Modeling Studies

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This document summarizes the coding and analysis of the Gulf of Mexico (GOM) oscillator and the Multivariate Empirical Orthogonal Functions (MAB EOF) for evaluating surface currents (U, V) over coarse and fine grid runs from 1993 to 2007. Key components include new tidal data integration, the comparison of modes, and the impacts of wind conditions on eddy formation and volume transport. Part 1 focuses on coding, while Parts 2-4 delve into detailed analyses of EOF modes and their implications for climate studies.

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Analysis of GOM Oscillator and MAB EOF: Coarse and Fine Grid Modeling Studies

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  1. Work summary Zhibin Sun Feb/19/2010

  2. Outline • Part 1: Coding • Part 2: MAB EOF for EL and (U,V) current for coarse grid • Part 3: GOM oscillator analysis: gomn117_noassim_noptb_n?wn_41: 02 to 62 • Part 4: GOM oscillator analysis: gomn117_noassim_noptb_n?wn_nogd_tprni0.05_c10_41

  3. Part 1: coding for MAB • Coarse grid run 1. continue ua*3.0 to year 2008 2. new one with correct tidal data 3. new one with correct tidal data and ccmp3 wind • Fine grid run 1. new one from above 2 2. new one from above 3

  4. Part 2: MAB EOF (cgrid) • EL, (U, V) current, Period: 1993-2007

  5. EL Mode #1 1st mode need to be excluded

  6. EL Mode #1 After 1st mode is excluded

  7. Mode #2 Mode #3

  8. (UV): surface to 50m Mode #1 Comparing to fine grid, mode #1 is similar.

  9. Mode #2 Mode #3

  10. Mode #4 Mode #5

  11. Part 3: GOM • gomn117_noassim_noptb_n?wn_41: 02 to 62 • Composite for eddy days • 1998/11 to 2003/11 • No wind (shown last week), with wind

  12. No wind With wind Whole mean

  13. With eddy No wind With wind

  14. No eddy No wind With wind

  15. The following slides of Part 2 • gomn117_noassim_noptb_ncwn_41: 02 to 62 • With wind

  16. Movies (every 5 days) • 1998 • 1999 • 2000 • 2001 • 2002 • 2003

  17. Ww,WE Phase shift

  18. EOF • volume transport • EL

  19. U(au) U(al)

  20. U(au) U(al) Mode #1

  21. U(au) U(al) Mode #2

  22. U(au) U(al) Mode #3

  23. EL Z(18C)

  24. EL Z(18C) Mode #1

  25. EL Z(18C) Mode #2

  26. EL Z(18C) Mode #3

  27. U(au),U(al) U(au),U(al),Z(18C)

  28. U(au),U(al) U(au),U(al),Z(18C) Mode #1

  29. U(au),U(al) U(au),U(al),Z(18C) Mode #2

  30. U(au),U(al) U(au),U(al),Z(18C) Mode #3

  31. Part 4: GOM oscillator • gomn117_noassim_noptb_n?wn_nogd_tprni0.05_c10_41 • determine eddy days • 1999 to 2006

  32. No wind eddy no eddy 1 no eddy 2 With wind

  33. No wind With wind Whole mean

  34. With eddy No wind With wind

  35. No eddy 1 No wind With wind

  36. No eddy 2 No wind With wind

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