Auswahl der wissenschaftlichen Literatur zum Thema „Vitesse du vent à la surface de la mer“
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Zeitschriftenartikel zum Thema "Vitesse du vent à la surface de la mer"
Rebbah, Redjem, Amar Bentounsi, Houcine Benalla und Hind Djeghloud. „Optimisation de la commande d’une génératrice à réluctance variable pour une application éolienne“. Journal of Renewable Energies 13, Nr. 3 (25.10.2023): 407–20. http://dx.doi.org/10.54966/jreen.v13i3.209.
Der volle Inhalt der QuellePirazzoli, Paolo Antonio. „Sur la vitesse des variations du niveau de la mer“. Annales de Géographie 107, Nr. 600 (1998): 220–32. http://dx.doi.org/10.3406/geo.1998.20846.
Der volle Inhalt der QuellePérez Villegas, Graciela. „El recurso viento y su disponibilidad en las áreas geográficas de México.“ Estudios Geográficos 53, Nr. 206 (30.04.1994): 149–65. http://dx.doi.org/10.3989/egeogr.1992.i206.149.
Der volle Inhalt der QuelleSalmon, Camille, und Virginie K. E. Duvat. „Enjeux de l'intégration des espaces naturels littoraux dans la gestion des risques liés à la mer“. La Houille Blanche, Nr. 2 (April 2018): 5–12. http://dx.doi.org/10.1051/lhb/2018015.
Der volle Inhalt der QuelleSantiago, L. G., A. G. Bonaldo und R. J. González. „Emulsifying ability of soy protein isolates obtained at pilot plant under simultaneous heat and reducing treatments / Capacidad emulsionante de aislados proteicos de soja obtenidos en planta piloto con tratamientos térmicos y reductores simultáneos“. Food Science and Technology International 5, Nr. 6 (Dezember 1999): 463–70. http://dx.doi.org/10.1177/108201329900500603.
Der volle Inhalt der QuelleOloukoi, J., I. Yabi und D. Johnson. „Influence des Facteurs Climatiques et Topograpbiques . Sur Les Risques de Feux de Vegetation au Centre du Benin“. Journal of Geospatial Science and Technology 1, Nr. 1 (01.11.2014): 31–51. http://dx.doi.org/10.54222/afrigist/jgst/v1i1.3.
Der volle Inhalt der QuelleJolivot, Audrey, David Gómez-Candón, Sylvain Labbé, Nicolas Virlet und Jean-Luc Regnard. „Acquisition d'images thermiques par drone : corrections radiométriques à partir de données terrain“. Revue Française de Photogrammétrie et de Télédétection, Nr. 213 (26.04.2017): 117–23. http://dx.doi.org/10.52638/rfpt.2017.194.
Der volle Inhalt der QuelleAoues, Kamel, Noureddine Moummi, Miloud Zellouf, Abdelhafid Moummi, Adnane Labed, Elhadj Achouri und Adel Benchabane. „Amélioration des performances thermiques d’un capteur solaire plan à air: Etude expérimentale dans la région de Biskra“. Journal of Renewable Energies 12, Nr. 2 (26.10.2023). http://dx.doi.org/10.54966/jreen.v12i2.135.
Der volle Inhalt der QuelleForce, Eric R. „Sea-cliff Erosion with Rising Sea-Level along Shores Exposing Glacial Material in Atlantic Canada: The Effect of Bedrock Slope and an Example from Isle Madame, Nova Scotia“. Geoscience Canada 40, Nr. 1 (26.04.2013). http://dx.doi.org/10.12789/geocanj.2013.40.004.
Der volle Inhalt der QuelleDissertationen zum Thema "Vitesse du vent à la surface de la mer"
Wald, Lucien. „Apport de la télédétection spatiale en infrarouge proche et moyen à la connaissance du milieu marin : relations entre le champ de température et le champ de courant, observations de l'état de surface et mesures de la vitesse du vent, la dynamique de la couche superficielle en mer Ligure“. Phd thesis, Université du Sud Toulon Var, 1985. http://tel.archives-ouvertes.fr/tel-00955230.
Der volle Inhalt der QuelleZambra, Matteo. „Méthodes IA multimodales dans des contextes d’observation océanographique et de surveillance maritime multi-capteurs hétérogènes“. Electronic Thesis or Diss., Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2024. http://www.theses.fr/2024IMTA0391.
Der volle Inhalt der QuelleThe aim of this thesis is to study the simultaneous use of heterogeneous ocean datasets to improve the performance of predictive models used in scientific and operational fields for the simulation and analysis of the ocean and marine environment. Two distinct case studies were explored in the course of the thesis work. The first study focuses on the local estimation of wind speed at the sea surface from underwater soundscape measurements and atmospheric model products. The second study considers the spatial extension of the problem and the use of observations at different scales and spatial resolutions, from pseudo-observations simulating satellite images to time series measured by in-situ infrastructures. The recurring theme of these investigations is the multi-modality of the data fed into the model. That is, to what extent and how the predictive model can benefit from the use of spatio-temporally heterogeneous information channels. The preferred methodological tool is a simulation system based on variational data assimilation and deep learning concepts
Astudillo, Orlando. „Rôle des interactions océan-atmosphère-continent sur la dynamique de la couche limite marine dans la région d'upwelling du Chili central“. Thesis, Toulouse 3, 2018. http://www.theses.fr/2018TOU30360.
Der volle Inhalt der QuelleEastern Boundary Upwelling Systems (EBUS) are the tropical to mid-latitudes oceanic regions along the west coast of the continents. They host very productive marine ecosystems owing to the mean equatorward low-level atmospheric circulation that uplifts cool subsurface nutrient-enriched waters that trigger marine life along the coast. While the fundamental oceanic processes behind such process are well known (i.e. Ekman transport and pumping), the oceanic modeling of the EBUS has remained problematic owing to difficulties in accounting realistically for phenomena at fine spatial scales in the transition zone between the littoral and the off-shore ocean. In this thesis we have focused on the Peru-Chile Upwelling System (so-called Humboldt system) and on the influence of the cross-shore mesoscale features of the winds near the coast, particularly the shoreward wind drop-off, which determinate the relative importance of the Ekman processes, and thus, the spatial and temporal structure of the upwelling. A combined approach based on satellite data analysis and regional modeling, both oceanic and atmospheric, is used to investigate the sensitivity of the oceanic circulation along the coast of central Chile to the characteristics of the wind drop-off. As a first step, the mean to seasonal near-shore surface atmospheric circulation along the coast of Peru and Chile is documented for the first time based on the altimeter data from four satellite missions (ENVISAT, JASON1, JASON2 and SARAL). The analysis reveals the existence of a marked shoreward reduction in the wind speed all along the coast, although the reduction rate is latitudinally dependent. Despite the relatively weak repetitivity of the satellites, it is shown that the altimetric data are able to sample the seasonal cycle of the wind drop-off at some locations. The estimate of coastal upwelling from these data suggests that Ekman pumping tends on average to dominate with respect to Ekman transport over the Peruvian coast, whereas over the central-Chilean coast, the Ekman transport is the dominant process. In a second step, a regional atmospheric model (WRF) at different horizontal resolutions (36km, 12km and 4km) in a nested configuration zoomed over the central-Chile region was developed in order to produce atmospheric fields with different characteristics of the wind-stress curl (drop-off) along the coast. The atmospheric model solutions are first evaluated against the satellite observations, showing a much larger realism than atmospheric Reanalyses near the coast. In particular, the simulated cyclonic wind curl along the coast related to the wind drop-off exhibit length scales between 8 and 45 km with a significant latitudinal variability, which is in agreement with the altimetric winds. The higher model resolution, the more confined to the coast the wind drop-off, with the latter evidencing a marked seasonality with a maximum intensity in spring-fall and minimum in winter. The relative contribution of the coastal divergence and Ekman pumping exhibits a latitudinal modulation linked to details in the orography and coastlines
ELFOUHAILY, TANOS MIKHAEL. „Modele couple vent/vagues et son application a la teledetection par micro-onde de la surface de la mer“. Paris 7, 1996. http://www.theses.fr/1996PA077320.
Der volle Inhalt der QuelleBourova, Ekaterina. „Etude de la structure lithosphérique par l'analyse d'ondes de surface dans deux zones de convergence : la mer Egée et l'Iran“. Phd thesis, Université Joseph Fourier (Grenoble), 2004. http://tel.archives-ouvertes.fr/tel-00721460.
Der volle Inhalt der QuelleAyet, Alex. „Flux de quantité de mouvement à l'interface air-mer : approche théorique du couplage entre turbulence et vagues de vent On the Impact of Long Wind-Waves on Near-Surface Turbulence and Momentum Fluxes, in Boundary-Layer Meteorology volume 174, March 2020 Scalewise return to isotropy in stratified boundary layer flows, in JGR Atmospheres 125 (16), August 2020 Scaling laws for the length scale of energy‐containing eddies in a sheared and thermally stratified atmospheric surface layer, in Geophysical Research Letters 47(23), December 2020“. Thesis, Brest, 2020. http://www.theses.fr/2020BRES0038.
Der volle Inhalt der QuelleDespite numerous works, the causal link between wind and waves is still a controversial subject. This is due, among others, to the multi-scale nature of a realistic ocean surface and to wave breaking, which changes its topology. In this thesis, such problems are studied from a theoretical perspective, using a phenomenological model linking the spectral and averaged properties of wall-bounded turbulence through the geometry attached eddies.The first part of the thesis revisits this phenomenological model by questioning its underlying assumptions and, in particular, reveals inconsistencies in the models used for the energy redistribution between turbulence components (the Rotta model). The phenomenological model is then used to study the coupling between long wind-waves (of order 10m) and turbulence. Results indicate that the deformation of attached eddies, induced by this interaction, could explain some of the variability in momentum fluxes for a given mean wind. Finally, the study of the coupling between turbulence and short breaking waves is approached by defining a roughness sublayer, in which the properties of the attached eddies depend solely on the speed of the dominant breaking fronts for a given wind. These two studies from the basis of a new paradigm to study the multi-scale coupling between the turbulent and wave spectra. This would allow accounting for the influence of environmental parameters on momentum and heat fluxes, and opens new paths both from a theoretical perspective and for the analysis of experimental data
Baaklini, Georges. „Characterization of the Eastern Mediterranean surface dynamics : Insights from drifter assimilation and machine learning techniques“. Electronic Thesis or Diss., Sorbonne université, 2022. http://www.theses.fr/2022SORUS186.
Der volle Inhalt der QuelleAn accurate estimation of the surface circulation is crucial because of its direct impact on physical and bio-geochemical water properties. However, currents estimation remains challenging because the stream field is affected by quickly changing flows. This problem increases in the Eastern Mediterranean Sea, where in-situ observations are relatively scarce and the inaccuracies of altimetric observations increase. Therefore, some of the mesoscale features are still debated or unknown, especially in the Levantine Basin. The thesis goal is to characterize these highly-evolving mesoscale features. In the first part of the thesis, we present a variational assimilation method that merges altimetry with drifters to improve the surface circulation representation along and around the assimilated drifters’ trajectories. We assess the method’s efficiency by comparing the velocities resulting from assimilation with independent in-situ observations and ocean color images. We use the corrected velocities to characterize short-term and local events occurring in the Levantine Basin. However, because of the significant spatio-temporal gaps in drifters’ coverage, the assimilation does not allow a continuous investigation of all the mesoscale patterns and their long-term variabilities in the basin. In the second part of the thesis, we use machine learning techniques to build a catalog of the several circulation regimes in the Levantine Basin, providing a long-term characterization of these features. We also try to explain the possible reasons behind previous contradictory assessments about some features, such as the Mid-Mediterranean Jet. The obtained results in the thesis improve the knowledge of the main mesoscale features’ characteristics, behaviors, and tendencies. The thesis applications could take advantage of other in-situ observations and of future altimetric missions like SWOT, promising to mitigate some of the actual altimetric shortcomings
Zamo, Michaël. „Statistical Post-processing of Deterministic and Ensemble Wind Speed Forecasts on a Grid“. Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLA029/document.
Der volle Inhalt der QuelleErrors of numerical weather prediction (NWP) models can be reduced thanks to post-processing methods (model output statistics, MOS) that build a statistical relationship between the observations and associated forecasts. The objective of the present thesis is to build MOS for windspeed forecasts over France on the grid of several NWP models, to be applied on operations at Météo-France, while addressing the two main issues. First, building MOS on the grid of some NWP model, with thousands of grid points over France, requires to develop methods fast enough for operational delays. Second, requent updates of NWP models require updating MOS, but training MOS requires an NWP model unchanged for years, which is usually not possible.A new windspeed analysis for the 10 m windspeed has been built over the grid of Météo-France's local area, high resolution (2,5km) NWP model, AROME. The new analysis is the sum of two terms: a spline with AROME most recent forecast as input plus a correction with a spline with the location coordinates as input. The new analysis outperforms the existing analysis, while displaying realistic spatio-temporal patterns. This new analysis, now available at an hourly rate over 4, is used as a gridded observation to build MOS in the remaining of this thesis.MOS for windspeed over France have been built for ARPEGE, Météo-France's global NWP model. A test-bed designs random forests as the most efficient MOS. The loading times is reduced by a factor 10 by training random forests over block of nearby grid points and pruning them as much as possible. This time optimisation goes without reducing the forecast performances. This block MOS approach is currently being made operational.A preliminary study about the estimation of the continuous ranked probability score (CRPS) leads to recommendations to efficiently estimate it and to generalizations of existing theoretical results. Then 4 ensemble NWP models from the TIGGE database are post-processed with 6 methods and combined with the corresponding raw ensembles thanks to several statistical methods. The best combination method is based on the theory of prediction with expert advice, which ensures good forecast performances relatively to some reference forecast. This method quickly adapts its combination weighs, which constitutes an asset in case of performances changes of the combined forecasts. This part of the work highlighted contradictions between two criteria to select the best combination methods: the minimization of the CRPS and the flatness of the rank histogram according to the Jolliffe-Primo tests. It is proposed to choose a model by first imposing the flatness of the rank histogram
Gential, Luc. „Modélisation du bilan de masse en surface de la calotte glaciaire antarctique“. Phd thesis, Grenoble 1, 2007. http://www.theses.fr/2007GRE10092.
Der volle Inhalt der QuelleThe Antarctic ice sheet surface mass balance (SMB, snow accumulation minus ablation) is sensitive to climate parameters and directly contributes to global mean sea level variations. Therefore, in the perspective of climate change, it is useful to develop tools that can simulate the physical processes involved in the Antarctic surface mass balance. The approach developed in this thesis consists in using a cascade of atmospheric models from large scale to local scale. Thus, a regional climate model (Modèle atmosphérique régional, hereinafter referred to as MAR), forced by European Centre for Medium-Range Weather Forecasts (ECMWF) reanalysis, provides a diagnostic physical-based rain- and snowfall disaggregation model with meteorological fields at the regional scale (typically 40-km resolution). In a first part, it is shown that the SMB calculated by MAR is in good agreement with observations in most regions. Nonetheless, runoff appears to be overestimated; the problem vanishes when introducing a dependency of albedo with solar zenithal distance. In a second part, it is shown that although the parameterizations invoked in the disaggregation model are fairly simple, the knowledge of small-scale topography (5-km resolution) is efficiently used to improve the spatial variability of precipitation - and therefore SMB - over coastal regions of Antarctica. Model validation is carried out with the help of snow height measurements provided by automatic weather stations. Over the coastal place of Law Dome, the net accumulation gradient is mostly due to orographic forcing of precipitation (rather than blowing snow). The disaggregation model dramatically underestimates precipitation over the Antarctic Plateau, where polar stratospheric clouds associated with radiative cooling could play a role in the formation of precipitation during the polar night
Gential, Luc. „Modélisation du bilan de masse en surface de la calotte glaciaire antarctique“. Phd thesis, Grenoble 1, 2007. http://tel.archives-ouvertes.fr/tel-00189139.
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