| DynBio |  |
| DynBio | |
| HAL: hal-00402483, version 1 |
| DOI: 10.1016/j.rse.2008.07.010 |
| Detailed view |  Export this paper |
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| Remote Sensing of Environment 112 (2008) 4242-4260 |
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| Inferring missing data in satellite chlorophyll maps using turbulent cascading |
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Claire Pottier 1, 2Antonio Turiel 3 |
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| (2008-12-04) |
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| Oceanic turbulent flows develop complicated patterns, with eddies, filaments and shear currents. Although usually referred as chaotic, their inner organization is strongly hierarchical: turbulent flows develop cascades, which transfer properties such as energy or scalar density from larger to smaller scales. In this work, we present a novel algorithm based on the cascade and able to fill data gaps in satellite images (particularly, chlorophyll concentration maps). The first step is to show that cascade processes for chlorophyll-a concentration images take a simple, explicit form when an appropriate wavelet (here Battle-Lemarié of order 3) representation is used. A reconstruction algorithm exploiting the cascade structure is then given with a detailed description. We discuss the validity and quality of this algorithm when applied to SeaWiFS and MODIS-Aqua ocean color images. An application to merging data from multiple satellite missions is presented together with a demonstration of the benefit of this algorithm over two other merging methods. |
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| 1: | Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) |
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CNRS : UMR5566 – Institut de recherche pour le développement [IRD] – CNES – Observatoire Midi-Pyrénées – INSU – Université Paul Sabatier [UPS] - Toulouse III |
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| 2: | Centre National d'Etudes Spatiales (CNES) |
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Ministère de l'Enseignement Supérieur et de la Recherche Scientifique |
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| 3: | Instituto de Ciencias del Mar (ICM) |
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Consejo Superior de Investigaciones Cientificas |
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| Subject | : | Sciences of the Universe/Ocean, Atmosphere |
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| Missing data – Oceanic phytoplankton – Satellite ocean color images – Turbulence cascading – Wavelet representation |
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| hal-00402483, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00402483 | |
| oai:hal.archives-ouvertes.fr:hal-00402483 | |
| From: Joel Sudre | |
| Submitted on: Tuesday, 7 July 2009 14:30:09 | |
| Updated on: Tuesday, 11 August 2009 11:16:02 | |
