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Ocean Surface Current Monitoring from Space: Methodology and Progress

Ocean Surface Current Monitoring from Space: Methodology and Progress. Fabrice Bonjean ( bonjean@esr.org ) Gary Lagerloef, Eric Johnson, John Gunn (Earth & Space Research) Laury Miller, Richard Legeckis, (NOAA/NESDIS) Gary Mitchum (USF) Mark Bourassa (FSU/COAPS)

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Ocean Surface Current Monitoring from Space: Methodology and Progress

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  1. Ocean Surface Current Monitoring from Space: Methodology and Progress Fabrice Bonjean (bonjean@esr.org) Gary Lagerloef, Eric Johnson, John Gunn (Earth & Space Research) Laury Miller, Richard Legeckis, (NOAA/NESDIS) Gary Mitchum (USF) Mark Bourassa (FSU/COAPS) Nancy Soreide, Willa Zhu (NOAA/PMEL)

  2. OCEAN SURFACE CURRENT ANALYSES REAL-TIME Envisat AVISO Jason-1 COAPS QuikScat GFO NOAA-n AVHRR Ships and Buoys NCEP March 02, 2006

  3. Satellite-derived currents: a brief retrospective • OSCAR methodology and comparison with in situ observations • Some known applications • Web site and server (http://www.oscar.noaa.gov) • Perspectives

  4. Picaut, J., A. J. Busalacchi, M. J. McPhaden, and B. Camusat (1990), Validation of the geostrophic method for estimating zonal currents at the equator from Geosat altimeter data, J. Geophys. Res., 95(C3), 3015–3024. Delcroix, T., J. Picaut, and G. Eldin (1991), Equatorial Kelvin and Rossby waves evidenced in the Pacific Ocean through geosat sea level and surface current anomalies, J. Geophys. Res., 96(Supplement), 3249–3262.

  5. Mechanism of the Zonal Displacements of the Pacific Warm Pool: Implications for ENSO J. Picaut, M. Ioualalen, C. Menkes, T. Delcroix, M. J. McPhaden. Science 29 November 1996 Picaut, J., E. Hackert, A. J. Busalacchi, R. Murtugudde, and G. S. E. Lagerloef, Mechanisms of the 1997–1998 El Niño–La Niña, as inferred from space-based observations, J. Geophys. Res., 107(C5), 3037, 2002.

  6. El Niño Tropical Pacific Ocean surface current and temperature evolution in 2002, and outlook for early 2003G. S. E. Lagerloef, R. Lukas, F. Bonjean, J. T. Gunn, G. T. Mitchum, M. Bourassa, A. J. Busalacchi,        2003-05-22 Climate Diagnostic Bulletin, CPC, NOAA

  7. OSCAR VELOCITY Vertical Shear Fabrice Bonjean and Gary S. E. Lagerloef. 2002: Diagnostic Model and Analysis of the Surface Currents in the Tropical Pacific Ocean.Journal of Physical Oceanography: Vol. 32, No. 10, pp. 2938–2954.

  8. Gridded QuikScat wind data from COAPS World wide buoy drifter deployment (AOML) data AVISO merged gridded SSH data Data: In a geographical domain D: in D January 2000-December 2004

  9. Preliminary results

  10. Systematic comparisons with in situ data TAO/TRITON and PIRATA currents 15m-drogued drifters within boxes

  11. ZONAL VELOCITY 5-day running mean for in situ data Western Equatorial Pacific 156°E 165°E

  12. ZONAL VELOCITY 5-day running mean for in situ data Eastern Equatorial Pacific 140°W 110°W

  13. ZONAL VELOCITY 5-day running mean for in situ data Central Equatorial Atlantic

  14. MERIDIONAL VELOCITY 5-day running mean for in situ data Equatorial Pacific 110°W 140°W 165°W

  15. MERIDIONAL VELOCITY 5-day running mean for in situ data 95°W 8°N 2°N 5°N 0°N 5°S 2°S 8°S

  16. Some applications • Oceanographic process studies • Wind speed corrections • Assimilation in models • Animal migration, fishery studies • Boeing launcher • US Coast Guards (in future)

  17. http://www.oscar.noaa.gov

  18. VALIDATION

  19. Perspectives • Beta version of global dataset released in April 2006 • Some future developments: • Spatial resolution increase • Very near-surface currents (h<10m)

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