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GOES-R LST VALIDATION:

GOES-R LST VALIDATION: ASSESSEMENT OF VALUE OF SURFACE AIR TEMPERATURE (SAT) OBSERVED AT CRN STATIONS FOR GOES RETREIVED LST VALIDATION (Land Team). Kostya Vinnikov January 6, 2010. Question: CAN WE USE CRN OBSERVED HOURLY SAT TO VALIDATE GOES-R RETRIEVED CLEAR SKY LST ? Data:

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GOES-R LST VALIDATION:

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  1. GOES-R LST VALIDATION: ASSESSEMENT OF VALUE OF SURFACE AIR TEMPERATURE (SAT) OBSERVED AT CRN STATIONS FOR GOES RETREIVED LST VALIDATION (Land Team) Kostya Vinnikov January 6, 2010

  2. Question: • CAN WE USE CRN OBSERVED HOURLY SAT TO VALIDATE • GOES-R RETRIEVED CLEAR SKY LST? • Data: • 2004-2005 HOURLY OBSERVATIONS AT LOCATIONS OF THREE COINSIDED CRN/SURFRAD STATIONS: • LST & SAT OBSERVATIONS AT CRN • LST AT SURFRAD & GOES-10 • DESERT ROCK, NV • FORT PECK, MT • BONDVILLE, IL • Answer: NO

  3. 2234 Clear Sky hours Raw Differences in HOURLY LST(GOES-10) – LST(SURFRAD) Mean=-1.8 K, σ=1.1 K. Adjusted σ=0.9 K Raw Differences in HOURLY LST(GOES-10) - LST(CRN) Mean=-0.1, σ=1.4 K. Adjusted σ=0.9 K Raw Differences in HOURLY LST( GOES-10) – SAT(CRN) Mean=4.4K, σ=6.2 K. Adjusted σ=1.8 K Raw Differences in HOURLY LST( CRN) – SAT(CRN) Mean=4.5K, σ=5.2 K. Adjusted σ=1.5 K Diurnal/Seasonal cycles in observed LST /SAT estimated from 2004-2005 observations at GOES-10, SURFRAD, & CRN

  4. σ=0.9 K σ=0.9 K σ=1.8 K σ=1.5 K DIURNAL/SEASONAL ADJUSTMENTS for RAW Validation DIFFERENCES IN HOURLY LST/SAT OBSERVED at GOES-10, SURFRAD, & CRN. Estimated from 2004-2005 data

  5. 1439 Clear Sky hours Raw Differences in HOURLY LST(GOES-10) – LST(SURFRAD). Mean=-2.2 K, σ=1.3 K. Adjusted σ=1.2 K Raw Differences in HOURLY LST(GOES-10) – LST(CRN) Mean=-1.9 K, σ=1.5 K. Adjusted σ=1.2 K Raw Differences in HOURLY LST(GOES-10) – SAT(CRN) Mean=-0.5 K, σ=4.1 K. Adjusted σ=1.9 K Raw Differences in HOURLY LST(GOES-10) - SAT(CRN) Mean=1.4, σ=3.9 K. Adjusted σ=1.7 K Diurnal/Seasonal cycles in observed LST/SAT estimated from 2004-2005 observations at GOES-10, SURFRAD, & CRN

  6. σ=1.2 K σ=1.2 K σ=1.9 K σ=1.7 K DIURNAL/SEASONAL ADJUSTMENTS for RAW Validation DIFFERENCES IN HOURLY LST/SAT OBSERVED at GOES-10, SURFRAD, & CRN. Estimated from 2004-2005 data

  7. 1276 Clear Sky hours Raw Differences in HOURLY LST(GOES-10) - LST(SURFRAD) Mean=-1.4 K, σ=1.7 K. Adjusted σ=1.3 K Raw Differences in HOURLY LST(GOES-10) - LST(CRN) Mean=-0.8 K, σ=1.9 K. Adjusted σ=1.6K Raw Differences in HOURLY LST(GOES-10) – SAT(CRN) Mean=-1.6 K, σ=2.9 K. Adjusted σ=1.5 K Raw Differences in HOURLY LST(CRN) – SAT(CRN) Mean=-0.8, σ=3.0 K. Adjusted σ=1.4 K Diurnal/Seasonal cycles in observed LST/SAT estimated from 2004-2005 observations at GOES-10, SURFRAD, & CRN

  8. σ = 1.3 K σ = 1.6 K σ = 1.5 K σ = 1.4 K Diurnal/Seasonal cycles in observed LST/SAT estimated from 2004-2005 observations at GOES-10, SURFRAD, & CRN

  9. STANDARDS of LST(GOES-10) VALIDATION DIFFERENCES RAW DIFFERENCES ADJUSTED DIFFERENCES

  10. CONCLUSION BASED ON TWO YEAR LST/SAT OBSERVATIONS AT THREE COLOCATED CRN AND SURFRAD STATIONS AND GOES-10 LST DATA • SURFRAD OBSERVED LST IS the BEST for VALIDATION of GOES OBSERVED LST • CRN OBSERVED LST CAN BE USED for VALIDATION of GOES OBSERVED CLEAR SKY LST. • CRN OBSERVED SAT CANNOT BE USED for VALIDATION of GOES OBSERVED CLEAR SKY LST.

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