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Статті в журналах з теми "Glaciolgia"
Segovia Rocha, Alexis Andrés, and Yohann Alfredo Videla Giering. "Caracterización Glaciológica de Chile." Investigaciones Geográficas, no. 53 (July 3, 2017): 3. http://dx.doi.org/10.5354/0719-5370.2017.41739.
Повний текст джерелаPlé, O., J. Meyssonnier, J. Weiss, and B. Fiorio. "Glaciologie et Génie Civil." La Houille Blanche, no. 5-6 (August 1995): 148–53. http://dx.doi.org/10.1051/lhb/1995062.
Повний текст джерелаJUVANON DU VACHAT, Regis. "Lu pour vous : "Histoire de la glaciologie" Par Frédérique Rémy." La Météorologie 8, no. 68 (2010): 61. http://dx.doi.org/10.4267/2042/31998.
Повний текст джерелаLetréguilly, Anne, and Louis Reynaud. "Past and Forecast Fluctuations of Glacier Blanc (French Alps)." Annals of Glaciology 13 (1989): 159–63. http://dx.doi.org/10.3189/s0260305500007813.
Повний текст джерелаLetréguilly, Anne, and Louis Reynaud. "Past and Forecast Fluctuations of Glacier Blanc (French Alps)." Annals of Glaciology 13 (1989): 159–63. http://dx.doi.org/10.1017/s0260305500007813.
Повний текст джерелаde Crécy, Louis. "La section de glaciologie de la Société hydrotechnique de France : origine et évolution." La Houille Blanche, no. 2-3 (April 1995): 17–21. http://dx.doi.org/10.1051/lhb/1995007.
Повний текст джерелаMarti, Renaud, Simon Gascoin, Thomas Houet, Dominique Laffly, and Pierre René. "Evaluation du modèle numérique d'élévation d'un petit glacier de montagne généré à partir d'images stéréoscopiques Pléiades : cas du glacier d'Ossoue, Pyrénées françaises." Revue Française de Photogrammétrie et de Télédétection, no. 208 (September 5, 2014): 57–62. http://dx.doi.org/10.52638/rfpt.2014.107.
Повний текст джерелаDevincenzi, Susana Mariel. "Catálogo de ejemplares tipo de las Colecciones Paleontológicas del Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales (IANIGLA), Mendoza, Argentina." Revista del Museo de La Plata 1, no. 2 (September 14, 2016): 83–108. http://dx.doi.org/10.24215/25456377e007.
Повний текст джерелаPortocarrero R., César A. "El cambio climático, la glaciología y los riesgos en la Cordillera Blanca Ancash — Perú." APORTE SANTIAGUINO 4, no. 2 (December 19, 2011): 208. http://dx.doi.org/10.32911/as.2011.v4.n2.547.
Повний текст джерелаRacoviteanu, Adina E., William F. Manley, Yves Arnaud, and Mark W. Williams. "Evaluating digital elevation models for glaciologic applications: An example from Nevado Coropuna, Peruvian Andes." Global and Planetary Change 59, no. 1-4 (October 2007): 110–25. http://dx.doi.org/10.1016/j.gloplacha.2006.11.036.
Повний текст джерелаДисертації з теми "Glaciolgia"
ROMMELAERE, VINCENT. "Trois problèmes inverses en glaciologie." Grenoble 1, 1997. http://www.theses.fr/1997GRE10166.
Повний текст джерелаBremer, Ulisses Franz. "Morfologia e bacias de drenagem da cobertura de gelo da Ilha Rei George, Antártica." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 1998. http://hdl.handle.net/10183/1395.
Повний текст джерелаLindau, Filipe Gaudie Ley. "Variabilidade do conteúdo iônico da neve e do firn ao longo de um transecto Antártico." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2014. http://hdl.handle.net/10183/128022.
Повний текст джерелаFive ice cores collected during the 2004–2005 Chilean-Brazilian Antarctic traverse, from Patriot Hills (80º18’S, 81º21’W) to the South Pole, had their uppermost layers chemically analyzed. The ion chromatography technique measured Na+, K+, Mg2+, Ca2+, MS-, Cl-, NO3- and SO42- concentrations. The mass spectrometry measured δD ratios. In order to interpret the spatial and the temporal variability of these parameters, this work dated the ice cores by counting the annual layers, using Na+, nssSO42- and δD profiles. Then it determined the net mean accumulation rates for each sampling site. The Na+ registers identified sea salt aerosols and sea ice aerosols only for the three sites located closer to the cost. The acid species produced on troposphere by reactions with sea spray predominated at the most inland sites. The biogenic contributions (expressed by MS- registers) as the NO3- concentrations responded to both physical and chemical post depositional processes.
Junior, Ivo Trosdtorf. "Geologia glacial Permo-Carbonífera (Subgrupo Itararé) no flanco sul do arco de Ponta Grossa, PR." Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/44/44136/tde-29092015-110747/.
Повний текст джерелаLandforms of glacial erosion of micro to meso-scale(striae, furrows, flutes)occur on sandstone of the Furnas Formation, and on Fluvio-glacial and subglacial tillite from the Itararé Subgrupo. They make up two superposed extense landscapes of glacial abrasion of over 1.5000Km² of area, exthumed and preserved, on the southern flanck of the Ponta Grossa arch. Features on the Furnas sandstone have been eroded by a glacier flowing on a hard (consolidated) bed, the substratum was soft or inconsolidated on the Paleozoic sediments. The different reologic behavior of the glacier bed is reflected on differences of features present on the two types of glacial substrata. Glacialplowing was the predominant erosional process in both cases, associated to a warm based glacier and presence of subglacial meltwater. In spite its hardness, positive glacial erosional features, as roches moutonnées, whale backs, etc, do not occur on the Devonian sandstone. This is due to the glacier having displaced on a previourly existing peneplain formed during a pre-Itararé Subgroup regional erosional phase, plus the homogenous lithology and horizontal disposition of beds.Striations are rectilinear and parallel on each abraded landscape. Intersection of striae with different directions was not found, indication a single erosional event in each case. The mean direction of striations vary from N12°W to N20°E on the Devonian and late Paleozoic rocks respestively. Sense of glacier movement was toward north. The two glacial erosional events have been assigned to two different successive \"glaciations\", named Rio do Salto and Cancela, but correspond most probably to events of glacier advance.Two exposures of striated surfaces on the fluvio-glacial and glacial-marine beds an on lodgement tilite of Itararé Subgroup in Palmeira and São Luis de Purunã, respectively, exhibit a variety of features and bear special importance in terms of Glacial Geology. In the later outcrop depositional glacial landsforms similar to glacial flutes have also been found. This is the first record of such features in the pre-Pleistocene succession. Correlation between these surfaces and those on top of Itararé elsewhere on the Ponta Grossa arch rocks is not entirely clear. In the two cases above the surfaces are multiple, reflecting oscilation of the glacier margin and alternating conditions of fast flow and erosion and slow flow and deposition. In spite of their subglacial origin, no evidence of strong shear deformation was found. Features were preserved from further erosion by a cover of subglacial till or of a bed of silt eposited on top of striated surfaces. Excellent exposures of Itararé Sbgroup rocks at Witmarsum contain several diamictite successions made up of subglacial and supraglacial tillites resulting from at least seven episodes of advance and retreat of the glacier. During one of those phases periglacial conditions occurred as documented by sand wedges and frost shattered clasts. Intercalation of shallow marine sandstone beds in the diamictite section indicate post-glacial, marine transgressive events. Hill-like deposits of deformed diamictite found in the studied area were interpreted as seasonal push moraines, resulting from oscilation of the glacier margin. Preservation of this type of proglacial landform is unique in pre-Pleistocene glaciogenic successions. The several stratigraphic cycles recognized in the Itararé Subgroup in the study area, have probably been controlled by a combination of advance and retreat of the Paraná glacial lobe and associated glacio eu- and isostatic movements. These movements occurred in the context of larger scale tectonic events, that look place during the tectonic evolution of the Ponta Grossa arch in the late Paleozoic.
Monnier, Sébastien Fouache Eric Kaiser Brigitte. "Les glaciers-rocheux, objets géographiques." Créteil : Université de Paris-Val-de-Marne, 2006. http://doxa.scd.univ-paris12.fr:80/theses/th0245655.pdf.
Повний текст джерелаMartin, Nathan. "Modélisation directe et inverse d'écoulements géophysiques viscoplastiques par méthodes variationnelles - Application à la glaciologie." Phd thesis, INSA de Toulouse, 2013. http://tel.archives-ouvertes.fr/tel-00920189.
Повний текст джерелаMartin, Nathan. "Modelisation directe et inverse d'ecoulements geophysiques viscoplastiques par methodes variationnelles : Application a la glaciologie." Thesis, Toulouse, INSA, 2013. http://www.theses.fr/2013ISAT0021/document.
Повний текст джерелаSeveral geophysical flows, such as ice flows or lava flows, are described by a gravity-driven low Reynolds number movement of a free surface viscoplastic fluid over a bedrock. Their modeling involves constitutive laws, typically describing their rheological behavior or interactions with their bedrock, that lean on empirical parameterizations. Otherwise, the thorough observation of this type of flows is rarely possible; data associated to the observation of these flows, mainly remote-sensed surface data, can be sparse, missing or uncertain. They are also generally indirect : unknown parameters such as the basal slipperiness or the rheology are difficult to measure on the field.This PhD work focuses on the direct and inverse modeling of these geophysical flows described by the power-law Stokes model, specifically dedicated to ice flows, using variational methods.The solution of the direct problem (Stokes non-linear) is based on the principle of minimal dissipation that leads to a variational four-field saddle-point problem for which we ensure the existence of a solution. In this context, the incompressibility condition and the constitutive rheological law represent constraints associated to the minimization problem. The critical points of the corresponding Lagrangian are determined using an augmented Lagrangian type algorithm discretized using three- field finite elements. This algorithm provides an important time and memory saving compared to classical algorithms.We then focus on the inverse numerical modeling of these fluids using the adjoint model through two main associated tools : sensitivity analysis and data assimilation. We first study the rheological modeling through the two principal input parameters (fluid consistency and rheological exponent). Sensitivity analyses with respect to these locally defined parameters allow to quantify their relative weights within the flow model, in terms of surface velocities. Identification of these parameters is also performed. The results are synthetized as a methodology towards “virtual rheometry” that could help and support rheological measurements.The basal slipperiness, major parameter in ice dynamics, is investigated using the same approach. Sensitivity analyses demonstrate an ability to see beyond the ”filtered” and non-local transmission of the basal variability to the surface. Consequently these sensitivities can be used to help defining areas of interest for observation and measurement. This basal slipperiness, empirical modeling of a multiscale complex process, is then used to carry on a comparison with a so called “self-adjoint” method, common in glaciology (neglecting the dependency of the viscosity on the velocity, i.e. the non-linearity). The adjoint model, obtained by automatic differentiation and evaluated by reverse accumulation, leads to define this approximation as a limit case of the complete inverse method. This formalism allows to generalize the process of the numerical evaluation of the adjoint state into an incomplete adjoint method, adjustable in time and accuracy depending on the quality of the data and the level of detail required in the identification.All this work is associated to the development of DassFlow-Ice software dedicated to the direct and inverse numerical simulation of free-surface viscoplastic fluids. This bidimensional prospective software, distributed within the glaciological com- munity, serves as a model for the current development of the tridimensional version
Zana, Fabrice. "La glaciologie : évolution du manteau nival, origine et devenir de l'eau de fonte des neiges." Paris 5, 1995. http://www.theses.fr/1995PA05P107.
Повний текст джерелаMichel, Rémi. "Les mesures de mouvements par imagerie sar et leur exploitation en glaciologie et en sismotectonique." Paris 11, 1997. http://www.theses.fr/1997PA112449.
Повний текст джерелаCosti, Juliana. "Estimativa do derretimento e descarga de água na porção norte da Península Antártica." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2011. http://hdl.handle.net/10183/32625.
Повний текст джерелаA 21-year time series of glacier surface melt and runoff was reconstructed for the northern Antarctic Peninsula. Surface air temperature from the ERA-Interim reanalysis project, carried out by the European Center for Medium Range and Weather Forecast (ECMRWF), was the main source of data for these estimates. 18 Envisat ASAR images, obtained during the summer of 2006/2007, were classified on wet and dry snow and, then, compared with the melt area obtained by the model. A linear regression was performed between both wet snow and melt area, and the equation was used to correct the annual melt area, melt and runoff. These corrected values were 8% and 22% higher than the model results. This percentage increases as model results values diminish. Melt (M) and runoff (R) maxima were found in 1998/1999, with respectively values of 7.75 Gt and 3 Gt. The minima were found in 2009/2010 (1.5 Gt and 0.15 Gt, respectively). Both variables showed high interannual variability. Melt and runoff highest means and standard deviations were detected in January and February (M=1.4± 0.3 and 1.5± 0.6 Gt, R=1.4± 0.3 and 1.3± 0.6). Maximum and minimum values of M and R, follow those patterns observed in the mean summer temperature measured on the available meteorological station. In the west side of the Peninsula, melt and runoff are restricted to coastal areas and islands. The former ice shelves Larsen A and B and Prince Gustav and their vicinity were the most continuous and largest melt and runoff areas observed.
Книги з теми "Glaciolgia"
Humlum, Ole. Glaciologi. 2nd ed. [Copenhagen]: Laboratorium for geomorfologi, Københavns universitets Geografiske centralinstitut, 1987.
Знайти повний текст джерелаHistoire de la glaciologie. Paris: Vuibert, 2007.
Знайти повний текст джерелаVliet-Lanoë, Brigitte Van. La planète des glaces: Histoire et environnements de notre ère glaciaire. Paris: Vuibert, 2005.
Знайти повний текст джерелаCanada, Geological Survey of, ed. The occurrence of glacial drift on the Magdalen Islands. Ottawa: Govt. Print. Bureau, 1997.
Знайти повний текст джерелаAber, James S. Glaciotectonic landforms and structures. Dordrecht [Holland]: Kluwer Academic Publishers, 1989.
Знайти повний текст джерелаA, Evans David J., ed. Glaciers & glaciation. London: Arnold, 1998.
Знайти повний текст джерелаJouzel, Jean. Planète blanche: Les glaces, le climat et l'environnement. Paris: O. Jacob, 2008.
Знайти повний текст джерелаCenter), Polar Libraries Colloquy (14th 1992 Byrd Polar Research. International sharing of polar information resources: Proceedings of the 14th Polar Libraries Colloquy : May 3-7, 1992, Byrd Polar Research Center, the Ohio State University, Columbus, Ohio, U.S.A. Columbus, OH: Byrd Polar Research Center, Ohio State University, 1992.
Знайти повний текст джерелаA, Evans David J., and Benn Douglas I, eds. A practical guide to the study of glacial sediments. London: Arnold, 2004.
Знайти повний текст джерелаThe periglacial environment. 2nd ed. Harlow, Essex: Longman, 1996.
Знайти повний текст джерела