Blooms of the phytoplankton coccolithophorid <i>Emiliania huxleyi</i> can cause significant changes to both the inherent and the apparent optical properties within an oceanic column. Measurements made within such a bloom off the southwestern coast of England during July 1999 are reported. The multiple scattering properties of the bloom prevented accurate retrieval of absorption (a) and attenuation (c) coefficients with a WETLabs ac-9. Upwelling radiance measurements were similarly affected by the bloom, which caused the sensors to saturate. An optical model has been developed that gives close agreement with the <i>in situ</i> optics when it is used as input to the Hydrolight radiative-transfer model.
© 2002 Optical Society of America
Timothy J. Smyth, Gerald F. Moore, Stephen B. Groom, Peter E. Land, and Toby Tyrrell, "Optical Modeling and Measurements of a Coccolithophore Bloom," Appl. Opt. 41, 7679-7688 (2002)