Detailed validation of the bidirectional effect in various Case 1 waters for application to ocean color imagery

Kenneth Voss, A. Morel, D. Antoine

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

The radiance viewed from the ocean depends on the illumination and viewing geometry along with the water properties, and this variation is called the bidirectional effect. This bidirectional effect depends on the inherent optical properties of the water, including the volume scattering function, and is important when comparing data from different satellite sensors. The current model of f/Q, which contains the bidirectional effect, by Morel et al. (2002) depends on modeled, not measured, water parameters, thus must be carefully validated. In this paper we combined upwelling radiance distribution data from several cruises, in varied water types and with a wide range of solar zenith angles. We compared modeled and measured Lview /Lnadir and found that the average difference between the model and data was less than 0.01, while the RMS difference between the model and data was on the order of 0.02-0.03. This is well within the statistical noise of the data, which was on the order of 0.04-0.05, due to environmental noise sources such as wave focusing.

Original languageEnglish (US)
Pages (from-to)781-789
Number of pages9
JournalBiogeosciences
Volume4
Issue number5
StatePublished - 2007

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ocean color
imagery
oceans
color
water
radiance
optical properties
satellite sensor
sensors (equipment)
lighting
zenith angle
optical property
upwelling
scattering
effect
geometry
ocean

ASJC Scopus subject areas

  • Earth-Surface Processes
  • Ecology, Evolution, Behavior and Systematics

Cite this

Detailed validation of the bidirectional effect in various Case 1 waters for application to ocean color imagery. / Voss, Kenneth; Morel, A.; Antoine, D.

In: Biogeosciences, Vol. 4, No. 5, 2007, p. 781-789.

Research output: Contribution to journalArticle

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