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L wN (  ) Uncertainty Estimation Using Hyperspectral GSM

L wN (  ) Uncertainty Estimation Using Hyperspectral GSM. Assume a GSM trio (Chl, CDM & BBP) and associate uncertainty level Drive hyperspectral GSM forward to calculate ensemble of L wN (  ) values Calculate L wN (  ) & its uncertainty bounds Sample using the ACE bandset.

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L wN (  ) Uncertainty Estimation Using Hyperspectral GSM

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  1. LwN() Uncertainty Estimation Using Hyperspectral GSM • Assume a GSM trio (Chl, CDM & BBP) and associate uncertainty level • Drive hyperspectral GSM forward to calculate ensemble of LwN() values • Calculate LwN() & its uncertainty bounds • Sample using the ACE bandset Siegel/Maritorena (UCSB)

  2. LwN() = f(Chl,CDM,BBP;) acdm() = CDM exp(-S (-440)) - S tuned to global LwN data set aph() = A() ChlB() - following Bricaud model but tuned to global LwN data set bbb() = BBP (440/) -  tuned to … aw() => Follows Morel’s clearest waters bbw() => Buiteveld 94 (S=36; T=12C) Fo() => Thuillier IOPs => Rrs() following Gordon et al 88 1 nm resolution

  3. aph() = A() ChlB() A() B() Wavelength (nm)

  4. Global Mean GSM Trio # realizations =100 - assumes 25% uncertainty in GSM trio

  5. NABE Bloom GSM Trio # realizations =100 - assumes 25% uncertainty in GSM trio

  6. Plumes & Blooms GSM Trio # realizations =100 - assumes 25% uncertaint7 in GSM trio

  7. Sampling of the ACE Bandset

  8. Next Steps? • Reassess uncertainty goals - we stated 25% for each GSM output (?) • Widen set of GSM triplets using field observations (probably NOMAD2) • Propagate to TOA to determine bounds on Lsat() • Build into full inversion model to test approach end to end

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