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ATOP – Assimilated Taiwan Ocean Prediction System

ATOP – Assimilated Taiwan Ocean Prediction System . Yu-Chun Lin Y-L Chang, H-F Lu, F-H Xu , Leo Oey. ATOP Goals. meters. Ocean’s Topography & Major Currents in the Western North Pacific ATOP Region. Japan Sea.

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ATOP – Assimilated Taiwan Ocean Prediction System

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  1. ATOP – Assimilated Taiwan Ocean Prediction System Yu-Chun LinY-L Chang, H-F Lu, F-H Xu, Leo Oey

  2. ATOP Goals meters Ocean’s Topography & Major Currents in the Western North Pacific ATOP Region Japan Sea • Build a data -Assimilated Taiwan Ocean Prediction(ATOP) system for the North Pacific Ocean with focus on NW-Pacific Marginal Seas • Use the model to conduct research to study processes Eddies East China Sea Kuroshio Eddies Typhoon South China Sea North Equatorial Current Mindanao Current

  3. ATOP N-Pacific & Nested Domains • Based on mpiPOM • Resolution: 0.1 ° x 0.1 °, 41 σ-level • Date : 1987/7 ~2011/12 spin-up; then forecast since Jan/2012 Forecast W-Pacific model GFS Wind, CCMP & ECMWF Wind, MCSST, AVISOSSHA Data assimilation

  4. * * mpiPOM = Message-Passing-Interface Princeton Ocean Model (for efficient parallelization)

  5. (Mellor & Ezer, 1991) (Yin & Oey, 2007)

  6. Western Pacific Forecast Model Based on mpiPOM Resolution:0.1 x0.1°, 31 σ-level, 7-days forecast GFS Wind, MCSST, SSHA -> Assimilation +7 days -7 days Today Plans for Model Enhancements: Resolution: 10 km 3km 1km Wave, tides, river, drifters, floats, ADCP, CODAR…etc. Sediment and sand transport, Bio-geochemical modeling

  7. Result from NW-Pacific forecast model Date : 05/15 ~05/28 Date : 05/15 ~05/21 7th day(5/21) RMS(>0.1) & correlation of Model SSH & AVISO SSH

  8. 2012/03/15 2012/04/01 ATOP Currents in Taiwan Strait: Mar/11 – Apr/11/2012

  9. ATOP HCAST 11-Mar-2012 ATOP HCAST 15-Mar-2012 ATOP HCAST 14-Mar-2012 ATOP HCAST 31-Mar-2012 ATOP HCAST 18-Mar-2012 ATOP HCAST 22-Mar-2012

  10. Daily Lowpass Daily Average Transport

  11. Daily Average Daily Lowpass Transport

  12. Daily Average Daily Lowpass Transport

  13. Summary • We have developed an ocean prediction system in Taiwan • ATOP produces daily forecasts of currents, SST etcin the N-Pacific – in particular: the marginal seas around Taiwan • Further enhancements are planned: - wave, tides, rivers, floats, drifters, ADCP, CODAR Thank You

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