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SMOS L2 Ocean Salinity
Level 2 Ocean Salinity Processor
TDS review
26 January 2009
Samantha LavenderPaul SpurgeonCaesar Mugerin
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SMOS L2 Ocean Salinity
Scenario 20 (dual pol)• V2, SSS1 (24-45 psu)
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SMOS L2 Ocean Salinity
Scenario 20 (dual pol)• V3, SSS1 (22-50 psu)
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SMOS L2 Ocean Salinity
Scenario 20 (dual pol)• V2, SSS1, -41 to -40 longitude
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SMOS L2 Ocean Salinity
Scenario 20 (dual pol)• V3, SSS1, -41 to -40 longitude
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SMOS L2 Ocean Salinity
Scenario 20 (dual pol)• V2, SSS1 sigma, -41 to -40 longitude
www.argans.co.uk
SMOS L2 Ocean Salinity
Scenario 20 (dual pol)• V3, SSS1 sigma, -41 to -40 longitude
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SMOS L2 Ocean Salinity
Scenario 09 (full pol)• V2, SSS1 (28-40 psu)
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SMOS L2 Ocean Salinity
Scenario 09 (full pol)• V3, SSS1 (31-42 psu)
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SMOS L2 Ocean Salinity
Indra TDS 033609 (dual pol)• V2, SSS1 (29-40 psu)
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SMOS L2 Ocean Salinity
Indra TDS 033609 (dual pol)• V3, SSS1 (29-40 psu)
www.argans.co.uk
SMOS L2 Ocean Salinity
Indra TDS 033609 (dual pol)
www.argans.co.uk
SMOS L2 Ocean Salinity
Indra TDS 033609 (dual pol)
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SMOS L2 Ocean Salinity
Indra TDS 162853 (full pol)• V2, SSS1 (30-39 psu)
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SMOS L2 Ocean Salinity
Indra TDS 162853 (full pol)• V3, SSS1 (29-39 psu)
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SMOS L2 Ocean Salinity
Scenario 20 SPH quality info• Total L1c grid points 63656• Rejected:
– 0 on land– 9410 too close to land– 14126 too few measurements– 0 missing ECMWF data– 0 suspect ice
• 34799 good quality grid points• 7465 poor quality grid points
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SMOS L2 Ocean Salinity
Scenario 20 SPH quality info• Two-scale scheme retrieval analysis
– Sea• 5718/23176 good quality (25%), average sigma 0.73
– Near Coast• 1513/11623 good quality (13%), average sigma 0.74
– Sea Ice• 0
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SMOS L2 Ocean Salinity
Scenario 20 SPH quality info• SSA scheme retrieval analysis
– Sea• 5923/23176 good quality (26%), average sigma 0.49
– Near Coast• 1578/11623 good quality (14%), average sigma 0.52
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SMOS L2 Ocean Salinity
Scenario 20 SPH quality info• Empirical scheme retrieval analysis
– Sea• 5083/23176 good quality (22%), average sigma 0.72
– Near Coast• 1573/11623 good quality (14%), average sigma 0.78
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SMOS L2 Ocean Salinity
Scenario 20 SPH quality info• Cardioid scheme retrieval analysis
– Sea• 23176/23176 good quality (100%), average sigma 0.53
– Near Coast• 11623/11623 good quality (100%), average sigma 0.68
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SMOS L2 Ocean Salinity
Scenario 20 SPH quality info• Two-scale scheme retrieval failure analysis
– Sea (23176 good quality grid points)• 491 outside valid range• 0 sigma too high• 2944 poor fit (chi2 or chi2_P)• 947 marquand failed• 973 reached maximum iterations• 16585 out-of-LUT
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SMOS L2 Ocean Salinity
SPH quality categories• Sea (Fg_sc_land_sea_coast1/2)• Near Coast (Fg_sc_land_sea_coast1/2)• Sea Ice (Fg_sc_suspect_ice)• Low, normal & high SSS, SST, WS
– 3 x 3 x 3– thresholds?
• SSS 32 & 38 psu• SST 278 & 298 K• WS 5 & 25 m/s
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