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A snapshot of sea surface height anomalies from T/P and ERS altimeters

Oceanic mesoscale processes determined from satellite altimetry and the prospects of a wide-swath radar altimeter Lee-Lueng Fu Jet Propulsion Laboratory California Institute of Technology Ocean Sciences Meeting March 5, 2008 Orlando, Florida.

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A snapshot of sea surface height anomalies from T/P and ERS altimeters

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  1. Oceanic mesoscale processes determined from satellite altimetry and the prospects of a wide-swath radar altimeter Lee-Lueng Fu Jet Propulsion Laboratory California Institute of Technology Ocean Sciences Meeting March 5, 2008 Orlando, Florida

  2. A snapshot of sea surface height anomalies from T/P and ERS altimeters

  3. Space-time Maximum Cross-Correlation Analysis T= 7 days xi ,yi T= 14 days T=0 T= -7 days T= -14 days

  4. Eddy propagation velocity (zonal) km/day

  5. Eddy propagation velocity (meridional) km/day

  6. Eddy Propagation velocity and SSH standard deviation: the South Atlantic 10 km/day

  7. Eddy propagation velocity with bathymetry: the Gulf Stream New England Seamount chain Bermuda 10 km/day

  8. Eddy propagation velocity with bathymetry: the Southern Ocean Kerguelen Plateau 10 km/day

  9. altimetry ECCO-2 Eastward velocity (km/day)

  10. Eddy zonal propagation speed altimetry ECCO model First mode Rossby waves km/day Latitude

  11. Spatial scales of the AVISO T/P-ERS merged data Overlapping at 150 km 210 km T/P along-track T/P-ERS mapped km Correlation of SSH time series as function of spatial separation A spatial scale computed as follows: T/P mapped L= 210 km Scales shorter than 200 km are not resolved. SSH wavenumber spectra (Ducet et al. 2000)

  12. 90% of the ocean’s kinetic energy is contained at scales not well resolved by a nadir-looking altimeter ground tracks of Jason (thick) and T/P (thin) Tandem Mission 10 km scale eddies 100 km scale eddies 100 km

  13. Altimetry SSH wavenumber spectrum Jason pass 132 (147 cycle average) Power density (cm2/cycles/km) Instrument noise Noise level of SWOT Wavenumber (cycles/km)

  14. Surface Water and Ocean Topography Mission (SWOT)

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