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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 39, Iss. 9 — Mar. 20, 2000
  • pp: 1351–1358

Vertical Attenuation Coefficient of Photosynthetically Active Radiation as a Function of Chlorophyll Concentration and Depth in Case 1 Waters

Alma D. Giles-Guzmán and Saúl Alvarez-Borrego  »View Author Affiliations


Applied Optics, Vol. 39, Issue 9, pp. 1351-1358 (2000)
http://dx.doi.org/10.1364/AO.39.001351


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Abstract

Based on empirical relations found in the literature, relatively simple mathematical models of the average of the total absorption of seawater [āT(z, Chl)], the chlorophyll-specific absorption coefficient of phytoplankton [ā*ph(z, Chl)], and the backscattering coefficient [b(Chl)], weighted by the in situ spectral distribution of photosynthetically active scalar irradiance (PAR), as functions of chlorophyll concentration and depth, were developed. The models for āT(z, Chl) and b(Chl) can be used to calculate the coefficient of vertical attenuation of PAR [o(z, Chl)] and therefore to estimate the vertical profile of PAR as an input to algorithms for primary production. One application of ā*ph(z, Chl) may be in the correction of the initial slope of the photosynthesis-irradiance curve [αᾱ*(z)] for the in situ spectral distribution of PAR and the package effect. Also, ā*ph(z, Chl) may be used to calculate φ(z), the in situ quantum yield of photosynthesis, from φmax and irradiance.

© 2000 Optical Society of America

OCIS Codes
(010.0010) Atmospheric and oceanic optics : Atmospheric and oceanic optics
(010.4450) Atmospheric and oceanic optics : Oceanic optics
(010.7340) Atmospheric and oceanic optics : Water
(330.5370) Vision, color, and visual optics : Physiological optics

Citation
Alma D. Giles-Guzmán and Saúl Alvarez-Borrego, "Vertical Attenuation Coefficient of Photosynthetically Active Radiation as a Function of Chlorophyll Concentration and Depth in Case 1 Waters," Appl. Opt. 39, 1351-1358 (2000)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-39-9-1351


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