On the Investigation of the Sea-Level Variability in Coastal Zones Using SWOT Satellite Mission: Example of the Eastern English Channel (Western France)
| Autor: | Benoit Laignel, Imen Turki, Stéphane Costa, Laetitia Chevalier, Nicolas Massei |
|---|---|
| Přispěvatelé: | Morphodynamique Continentale et Côtière (M2C), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS), Littoral, Environnement, Télédétection, Géomatique (LETG - Caen), Littoral, Environnement, Télédétection, Géomatique UMR 6554 (LETG), Normandie Université (NU)-Normandie Université (NU)-Université d'Angers (UA)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Brest (UBO)-Université de Rennes 2 (UR2), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Géographie et d'Aménagement Régional de l'Université de Nantes (IGARUN), Université de Nantes (UN)-Université de Nantes (UN)-Université de Caen Normandie (UNICAEN), Université de Nantes (UN)-Université de Nantes (UN) |
| Rok vydání: | 2015 |
| Předmět: |
Atmospheric Science
010504 meteorology & atmospheric sciences Meteorology 0211 other engineering and technologies Storm 02 engineering and technology Physical oceanography 01 natural sciences Ocean surface topography 13. Climate action Environmental science Satellite 14. Life underwater Altimeter Computers in Earth Sciences [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Extreme value theory SWOT analysis [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Sea level 021101 geological & geomatics engineering 0105 earth and related environmental sciences |
| Zdroj: | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, IEEE, 2015, 8 (4), pp.1564-1569. ⟨10.1109/JSTARS.2015.2419693⟩ |
| ISSN: | 2151-1535 1939-1404 |
| DOI: | 10.1109/jstars.2015.2419693 |
| Popis: | (IF 1.59; Q1); International audience; The future mission of surface water and ocean topography (SWOT), launched in 2020 over a period of 3-5 years, will be designated to address the issue of combining surface water hydrology with physical oceanography aiming to present new perspectives of applications for coastal areas. The extent to which the synthetic SWOT measurements can reproduce the temporal variability of the sea level was investigated. The eastern English Channel (NW France) was considered as a case of application. The hourly sea-level records were filtered from the aliased harmonic tides by classic harmonic analyses to obtain the nontidal residual. This residual was used to simulate synthetically the satellite samples based on the number of overpasses per repeat cycle at each geographical station. Both real and synthetic SWOT measurements were compared by the use of different approaches of inference statistics and wavelets. The statistical behavior, deduced from the functions of probability density (pdf) and cumulative distribution (cdf), shows correlations between 65% and 75% for hourly measurements, which increase to 85% for monthly average ones. The frequency of positive and negative extreme values is under-estimated with an order less than 25%. The potential use of SWOT depends on the number of measurements and the sampling interval between SWOT overpasses per repeat orbit. In the time- frequency domain, the wavelet multiresolution analysis of the nontidal sea level displays four components: 1) 1 year; 2) ~4-7 month; 3) ~2-3 month; and 4) |
| Databáze: | OpenAIRE |
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