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| Alvain, S.; Loisel, H.; Dessailly, D.. |
| Past years have seen the development of different approaches to detect phytoplankton groups from space. One of these methods, the PHYSAT one, is empirically based on reflectance anomalies. Despite observations in good agreement with in situ measurements, the underlying theoretical explanation of the method is still missing and needed by the ocean color community as it prevents improvements of the methods and characterization of uncertainties on the inversed products. In this study, radiative transfer simulations are used in addition to in situ measurements to understand the organization of the signals used in PHYSAT. Sensitivity analyses are performed to assess the impact of the variability of the following three parameters on the reflectance anomalies:... |
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| Ano: 2012 |
URL: https://archimer.ifremer.fr/doc/00661/77339/78769.pdf |
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| Loisel, H.; Vantrepotte, V.; Norkvist, K.; Meriaux, Xavier; Kheireddine, M.; Ras, J.; Pujo-pay, M.; Combet, Y.; Leblanc, K.; Dall'Olmo, G.; Mauriac, R.; Dessailly, D.; Moutin, T.. |
| The variability of inherent optical properties is investigated in the ultra-oligotrophic waters of the Mediterranean Sea sampled during the BOUM experiment performed during early summer 2008. Bio-optical relationships found for ultra-oligotrophic waters of the three anticyclonic gyres sampled significantly depart from the mean standard relationships provided for the global ocean, confirming the peculiar character of these Mediterranean waters. These optical anomalies are diversely related to the specific biological and environmental conditions occurring in the studied ecosystem. Specifically, the surface specific phytoplankton absorption coefficient exhibits values lower than those expected from the general relationships mainly in relation with a high... |
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| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00133/24403/22415.pdf |
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