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20110513

20110513. alu. EKE – averaged zonally as well as from 18 o -25 o N. LEKE= ln (EKE/EKE0). EKE=EKE0*e 1 where EKE has grown to e-fold of its initial value. EKE=EKE0.  Feb = 1/180d.  Mar = 1/210d.  Jan = 1/280d.  Apr = 1/305d.  May = 1/380d.

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20110513

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  1. 20110513 alu

  2. EKE – averaged zonally as well as from 18o-25oN LEKE=ln(EKE/EKE0) EKE=EKE0*e1 where EKE has grown to e-fold of its initial value EKE=EKE0 Feb = 1/180d Mar = 1/210d Jan = 1/280d Apr = 1/305d May= 1/380d /wrk/profs/hunglu/model/sbPOM/stcc_ideal/stcc_nec_3yr/from_gaea/stcc_run_perturb_3yr_fs/eke_growth_rate/monthly_log_EKE_over_EKE0_0d.gif

  3. Free relax Selected months: Mar, May, Sep, Nov Eddy kinetic Energy (averaged from 18N~25N)

  4. EKE=EKE0eσt LEKE≡ln(EKE/EKE0)=σt d (LEKE)/dt= σ Case: Mar 10 j-point smooth No-smooth LEKE≡ln(EKE/EKE0)=σt, When LEKE=1, tells that EKE=e*EKE0. In this figure, the red line indicates how long the EKE along latitude takes to grow to e*EKE0. i.e., it takes longer to reach LEKE=1 around 20~22N than 22~24N d (LEKE)/dt= σ unit: 1/day Pink:50days red: 100days Green: <0

  5. EKE=EKE0eσt LEKE≡ln(EKE/EKE0)=σt d (LEKE)/dt= σ Case: May 10 j-point smooth No-smooth LEKE≡ln(EKE/EKE0)=σt d (LEKE)/dt= σ

  6. EKE=EKE0eσt LEKE≡ln(EKE/EKE0)=σt d (LEKE)/dt= σ Case: Sep 10 j-point smooth No-smooth LEKE≡ln(EKE/EKE0)=σt d (LEKE)/dt= σ

  7. EKE=EKE0eσt LEKE≡ln(EKE/EKE0)=σt d (LEKE)/dt= σ Case: Nov 10 j-point smooth No-smooth LEKE≡ln(EKE/EKE0)=σt d (LEKE)/dt= σ

  8. Shorteste-folding day are around 22N

  9. 200 days 200 days 100 days e-folding day for each month, minimum at Oct, maximum at Feb (averaged from 18N~25N) 100 days Black line: Instantaneous growth rate, which is the slope of LEKE, at e-folding day for each month. red line: mean growth rate from t=0 to e-folding day

  10. Free relax PV maps at 55m No positive value Mar May Sep Nov Initial state Mid devlp full devlp Sep is th most stable case

  11. Free relax PV profiles at 137E No positive value Mar May Sep Nov Initial state Mid Devlp (@e-fold day) full devlp

  12. Free relax dPVdy profiles at 137E superimposed with u and temp No positive value in PV Mar May Sep Nov Initial state Mid Devlp (at e-fold day) full devlp

  13. March: Elevation & current Mid-slope Day:280 Eddy’s diameter~= 250KM Full-develp Day:1080

  14. spatially high-pass satellite SSH Study Region 25 20 15 trajectories of all of the 2435 cyclones (blue lines) and 2273 anticyclones (red lines) Study Region 25 20 15

  15. 25 20 15

  16. spatially high-pass satellite SSH 25 20 15 trajectories of all of the 2435 cyclones (blue lines) and 2273 anticyclones (red lines) 25 20 15

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