Simultaneous retrieval of aerosol and coastal ocean properties by optimal estimation

Knut Stamnes, Wei Li, R. Spurr, Jakob J. Stamnes

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations

Abstract

We analyze Sea Viewing Wide Field-Of-View Sensor (SeaWiFS) images over the Santa Barbara Channel. Pixel-by-pixel measurements of radiances at 8 SeaWiFS channels and analytic Jacobians are simulated using a coupled atmosphere-ocean radiative transfer model. The retrival algorithm is based on optimal estimation with loosely constrained a priori data. The 5-element state vector has two aerosol (optical depth at 865 nm, bimodal fraction of particles) and three marine parameters (chlorophyll concentration, detrital/dissolved-matter absorption at 443 nm, and backscattering coefficient at 443 nm). The retrieval is stable and well posed; the results are smoother and show less spread than those derived from the standard SeaDAS v4.8 algorithm. Water-leaving radiances agree well with field measurements. The average radiance residual is less than 1% for 7 SeaWiFS channels, and less than 2% for the 765 nm channel.

Original languageEnglish
Pages (from-to)343-346
Number of pages4
JournalAIP Conference Proceedings
Volume1100
DOIs
StatePublished - 2009
EventInternational Radiation Symposium, IRS 2008 - Foz do Iguacu, Brazil
Duration: 3 Aug 20088 Aug 2008

Keywords

  • Coupled media
  • Discrete-ordinate method
  • Forward inverse modeling
  • Radiative transfer
  • Remote sensing

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