Mesoscale and seasonal bio-optical properties variability in coastal waters using the example of the eastern English Channel during Spring, 2000

Vincent Vantrepotte; Christophe Brunet; Xavier Meriaux; Eric Lecuyer; Eric Dilligeard; Richard P. Santer

doi:10.1117/12.467320

8 May 2003 Mesoscale and seasonal bio-optical properties variability in coastal waters using the example of the eastern English Channel during Spring, 2000

Vincent Vantrepotte, Christophe Brunet, Xavier Meriaux, Eric Lecuyer, Eric Dilligeard, Richard P. Santer

Author Affiliations +

Proceedings Volume 4892, Ocean Remote Sensing and Applications; (2003) https://doi.org/10.1117/12.467320
Event: Third International Asia-Pacific Environmental Remote Sensing Remote Sensing of the Atmosphere, Ocean, Environment, and Space, 2002, Hangzhou, China

Abstract

Remote sensed chlorophyll α (chlα) maps are useful to proceed to phytoplankton dynamics study and primary production modelization in coastal waters. However, chlα remote sensing depend on the bio-optical characteristics of waters masses which are site-specific and highly variable according to space and time in coastal waters. In order to study the seasonal variability of phytoplankton and bio-optic parameters as well as the factors controlling their spatio-temporal distributions, five mesoscale cruises (BIOPTEL) were carried out in the eastern English Channel during the spring 2000 (between February and October). Phytoplankton absorption spectrum showed a high variability according to space and time due to the algal community composition and the physiological state. Considering these scales of variation, a local model was defined. The variability of the two other components of marine absorption: yellow substances and non algal particles are also presented and related to exogenous parameters such as river flow, temperature and hydrodynamism. Furthermore, in order to appreciate how important are the local IOPs (Inherent Optical Properties) variability on AOPs (Apparent Optical Properties) restitution a sensitivity analysis was realized. In the frame of biomass estimation, marine reflectance were simulated considering the local absorption coefficients rather than the standard ones.

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Vincent Vantrepotte, Christophe Brunet, Xavier Meriaux, Eric Lecuyer, Eric Dilligeard, and Richard P. Santer "Mesoscale and seasonal bio-optical properties variability in coastal waters using the example of the eastern English Channel during Spring, 2000", Proc. SPIE 4892, Ocean Remote Sensing and Applications, (8 May 2003); https://doi.org/10.1117/12.467320

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KEYWORDS

Absorption

Water

Reflectivity

Coastal modeling

Oceanography

Particles

Ocean optics

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