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Sea surface salinity remote sensing / Emmanuel P. Dinnat (2019)  

Public Titre : Sea surface salinity remote sensing Type de document : Monographie Auteurs : Emmanuel P. Dinnat, Éditeur scientifique ; Xiaobin Yin, Éditeur scientifique Editeur : Bâle [Suisse] : Multidisciplinary Digital Publishing Institute MDPI Année de publication : 2019 Importance : 296 p. Format : 17 x 23 cm ISBN/ISSN/EAN : 978-3-03921-077-0 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] Arctique, océan [Termes IGN] Atlantique (océan) [Termes IGN] bande L [Termes IGN] fusion de données [Termes IGN] HYbrid Coordinate Ocean Model [Termes IGN] image SAC-D-Aquarius [Termes IGN] image SMOS [Termes IGN] Indien (océan) [Termes IGN] Méditerranée, mer [Termes IGN] Mexique (golfe du) [Termes IGN] modèle de transfert radiatif [Termes IGN] océanographie [Termes IGN] Pacifique (océan) [Termes IGN] salinité [Termes IGN] Soil Moisture Active Passive [Termes IGN] surface de la mer Résumé : (éditeur) This Special Issue gathers papers reporting research on various aspects of remote sensing of Sea Surface Salinity (SSS) and the use of satellite SSS in oceanography. It includes contributions presenting improvements in empirical or theoretical radiative transfer models; mitigation techniques of external interference such as RFI and land contamination; comparisons and validation of remote sensing products with in situ observations; retrieval techniques for improved coastal SSS monitoring, high latitude SSS and the assessment of ocean interactions with the cryosphere; and data fusion techniques combining SSS with sea surface temperature (SST). New instrument technology for the future of SSS remote sensing is also presented. Note de contenu : 1- Status of Aquarius and salinity continuity 2- The salinity retrieval algorithms for the NASA Aquarius Version 5 and SMAP version3 releases 3- Assessment of Aquarius Sea surface salinity 4- Improving SMOS sea surface salinity in the Western Mediterranean Sea through multivariateand multifractal analysis 5- Seven Years of SMOS sea surface salinity at high latitudes: Variability in Arctic and Sub-Arctic region 6- Inter comparison of in-situ and remote sensing salinity products in the Gulf of Mexico, a river-influenced system 7- Remote sensing of sea surface salinity: Comparison of satellite and in situ observations and impact of retrieval parameters 8- An observational perspective of sea surface salinity in the Southwestern Indian Ocean and its role in the South Asia summer monsoon 9- The potential and challenges of using soil moisture active passive (SMAP) sea surface salinity to monitor Arctic Ocean freshwater changes 10- Assessing coastal SMAP surface salinity accuracy and its application to monitoring Gulf of Maine circulation dynamics 11- SMAP and CalCOFI observe freshening during the 2014–2016 Northeast Pacific warm anomaly 12- Seasonal variability of retroflection structures and transports in the Atlantic Ocean as Inferred from satellite-derived salinity maps 13- Comparison of the retrieval of sea surface salinity using different instrument configurations of MICAP 14- End-to-End simulation of WCOM IMI sea surface salinity retrieval Numéro de notice : 17663 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Recueil / ouvrage collectif DOI : 10.3390/books978-3-03921-077-0 En ligne : https://doi.org/10.3390/books978-3-03921-077-0 Format de la ressource électronique : url Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=97393

Estimated location of the seafloor sources of marine natural oil seeps from sea surface outbreaks : A new "source path procedure" applied to the northern Gulf of Mexico / Zhour Najoui in Marine and Petroleum Geology, Vol 91 (March 2018)  

Public [article]  inMarine and Petroleum Geology > Vol 91 (March 2018) . - pp 190 - 201 Titre : Estimated location of the seafloor sources of marine natural oil seeps from sea surface outbreaks : A new "source path procedure" applied to the northern Gulf of Mexico Type de document : Article/Communication Auteurs : Zhour Najoui , Auteur ; Serge Riazanoff, Auteur ; Benoit Deffontaines , Auteur ; Jean-Paul Xavier, Auteur Année de publication : 2018 Projets : 3-projet - voir note / Article en page(s) : pp 190 - 201 Note générale : Bibliographie This work is performed as a part of a PhD research program funded by VisioTerra/UPE (Université Paris-Est) and ANRT/CIFRE (N° 2013/1252). Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] fond marin [Termes IGN] HYbrid Coordinate Ocean Model [Termes IGN] image radar moirée [Termes IGN] Mexique (golfe du) [Termes IGN] modèle stochastique [Termes IGN] pétrole Résumé : (Auteur) Marine oil reservoirs are generally characterized on the sea surface by the presence of natural oil seeps (Sea Surface outbreaks - hereafter SSO). The latter are easily evidenced with Synthetic Aperture Radar (SAR) images because of the dampening effect that oil has on the capillary and associated small gravity waves (Bragg waves). The sea surface outbreaks of oil seeps are offset from their source on the seabed (seafloor sources - SFS) by hundreds meters or even kilometres. This displacement all along the sea water column is a function of the upward velocity of the oil droplet size, and the presence of lateral marine currents. This paper proposes a Vertical Drift Model (VDM) that combines both SAR images to get the SSO and the hydrodynamic model (HYCOM) function of the oil droplet size to estimate the SFS. After oil seeps detection from SAR images, the VDM proceeds to a regression in time and space based on the upward velocity of the oil, based on Stokes law, and the hydrodynamic conditions (HYCOM) to estimate the location of the seep source on the seafloor. The upward velocity depends strongly on the unknown droplet size. We propose herein a new VDM method named "sources paths" that allows to estimate the oil seeps sources on the seafloor without a priori knowledge of the oil droplet size by finding, for each oil seep, the seafloor sources corresponding to different diameters. We call "sources path" the line that joins the seafloor sources for an oil seep. The seafloor sources ought to be at the intersection of the maximum sources paths. The methodology has been applied to the northern Gulf of Mexico where the locations of many prolific oil seep sites are well known. A first validation of the source path procedure is that the obtained SFSs correspond to the seafloor sources of oil droplets having the same diameter and seeped at different times. Another validation has been performed through the comparison of SFS locations and those of the outcropping shallow salt. This comparison shows a good correlation and suggests that the oil seeps may be situated above the allochtonous toward autochthonous salt connections. Numéro de notice : A2018-064 Affiliation des auteurs : LASTIG LAREG+Ext (2012-mi2018) Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.marpetgeo.2017.12.035 Date de publication en ligne : 04/01/2018 En ligne : https://doi.org/10.1016/j.marpetgeo.2017.12.035 Format de la ressource électronique : URL Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=89404 [article]