Updated april 17 2007
The radial direction is mostly toward the east, southing about 10 deg. On this merged sea surface roughness(intensity) and radial surface velocities (color) derived from the new Doppler grid in WSS products (left), the Gulf stream meanders are clearly visibles in the doppler derived velocity map and the sea surface roughness fronts at the edges of the meanders confirms the presence of current fronts at convergent and divergent zones. Chlorophyle concentration index and sea surface temperature derived from MODIS AQUA 2h20 after ASAR scene with clear sky conditions (right) is showing us a rather good agreament between chlorophyle/temperature fronts and sea surface roughness/radial current fronts
Ancilliary Model and complementary remote sensing data are given to help the interpretation of composite ssr/Doppler derived velocities. On the left, Mercator ocean model surface current output for the same day as ASAR acquisition is showing us the predicted Gulf Stream path. On the right, Hycom (RSMAS) ocean model surface current output for the same day as ASAR acquisition is showing us a Gulf Stream path that is in better accordance with Doppler information.
The radial direction is mostly toward the east, northing about 10 deg.
The radial direction is mostly toward the east, northing about 15 deg. SAR wind field and sea surface temperature are given to highlight the presence of northing coastal current.
Graphics generated with SARTool
ASAR Wide Swath data : copyright ESA
HYCOM model : copyright RSMAS
MERCATOR model : copyright MERCATOR
SALTO-DUACS : copyright CLS
MODIS AQUA SST and CHL-A: copyright NASA
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