Possibilit S D Application Aux Probl Mes De Recherche Concernant La Neige Le N V Et La Glace Dans L Antarctique

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Possibilit S D Application Aux Probl Mes De Recherche Concernant La Neige Le N V Et La Glace Dans L Antarctique

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Author : Claude Lorius
language : fr
Publisher:
Release Date : 1963

Possibilit S D Application Aux Probl Mes De Recherche Concernant La Neige Le N V Et La Glace Dans L Antarctique written by Claude Lorius and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1963 with categories.

Le Deut Rium Possibilit S D Application Aux Probl Mes De Recherche Concernant La Neige Le N V Et La Glace Dans L Antarctique

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Author : Claude Lorius
language : fr
Publisher:
Release Date : 1963

Le Deut Rium Possibilit S D Application Aux Probl Mes De Recherche Concernant La Neige Le N V Et La Glace Dans L Antarctique written by Claude Lorius and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1963 with categories.

Comit National Fran Ais Des Recherches Antarctiques Publications

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Author : Comité national français pour les recherches antarctiques (Paris)
language : fr
Publisher:
Release Date : 1963

Comit National Fran Ais Des Recherches Antarctiques Publications written by Comité national français pour les recherches antarctiques (Paris) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1963 with categories.

La Neige Du Plateau Antarctique Surface Sp Cifique Et Applications

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Author : Jean-Charles Gallet
language : fr
Publisher:
Release Date : 2010

La Neige Du Plateau Antarctique Surface Sp Cifique Et Applications written by Jean-Charles Gallet and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.

La neige est la surface terrestre la plus réfléchissante et sa présence sur de vastes étendues comme l'Antarctique affecte considérablement le bilan énergétique de la Terre. L'albédo de la neige dépend de ses propriétés physiques, et notamment de sa surface spécifique, c'est-à-dire de la surface totale de ce milieu poreux accessible aux gaz, par unité de masse. La surface spécifique (SS) est également une variable importante pour la chimie des interactions neige-atmosphère, car elle permet de quantifier les molécules adsorbées. Cependant, faute de méthodes simples pour la mesurer, la SS de la neige antarctique a été très peu étudiée. Un des objectifs de ce travail a été de concevoir et de mettre au point un nouveau dispositif expérimental pour mesurer la SS de la neige à partir de sa réflectance dans l'infra-rouge. Ce dispositif permet une mesure rapide avec une précision de 10 % et il est facile à mettre en œuvre dans les conditions hostiles des régions polaires. Nous avons ainsi réalisé les premières mesures de SS de la neige de surface sur le plateau Antarctique, à Dôme C (DC) et sur le trajet entre DC et la base côtière de Dumont D'Urville (DDU). Ces mesures ont été effectuées dans des puits d'environ un mètre de profondeur. Des suivis de l'évolution journalière de la SS ont également été réalisés. Il a été mis en évidence que les propriétés physiques de la neige sont spatialement inhomogènes à l'échelle de quelques mètres sur le plateau Antarctique car l'accumulation y est très faible et le vent remobilise la neige de surface, pour la redéposer en couches discontinues. Des hétérogénéités sont aussi observées entre DC et DDU, à cause notamment de l'augmentation de la vitesse du vent lorsque l'on se rapproche de la côte. A l'échelle journalière, les variations de la SS de la neige observées pour les deux premiers centimètres du manteau neigeux s'expliquent par la formation de givre de surface la nuit et de cristaux de sublimation le jour. Toutes ces mesures nous ont permis de calculer l'albédo de la neige sur le plateau Antarctique et ses variations journalières. Une étude préliminaire propose une comparaison de ces mesures avec des observations satellitales et les premiers résultats sont très encourageants quant à la possibilité de déterminer la SS de la neige depuis l'espace.

Dynamics Of Ice Cover

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Author : L. A. Timokhov
language : en
Publisher:
Release Date : 1984

Dynamics Of Ice Cover written by L. A. Timokhov and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Ice categories.

Routledge Dictionary Of Economics

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Author : Donald Rutherford
language : en
Publisher: Routledge
Release Date : 2013-06-26

Routledge Dictionary Of Economics written by Donald Rutherford and has been published by Routledge this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-06-26 with Business & Economics categories.

The Routledge Dictionary of Economics, now in its third edition, provides the clearest, most authoritative definition of economic and financial terms available. The book is perfect for students and professionals interested in a broad range of disciplines including Business, Economics, Finance, and Accountancy and all additional subjects where a knowledge of these fields of essential. The dictionary has been updated to reflect the economic changes of the new Millennium including the emergence of experimental and behavioural economics, new political economy, the importance of institutions, globalization, environmental economics, financial crises and the economic emergence of China and India. It’s an international dictionary that includes succinctly explained A to Z entries and definitive explanations of the key terms, accompanied by a short bibliography and comprising supplementary online definitions. In a world where the reader is met with a barrage of conflicting and competing information, this book continues to provide a definitive guide to economics.

Turn Down The Heat

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Author : A Report for the World Bank by the Potsdam Institute for Climate Impact Research and Analytics.
language : en
Publisher: World Bank Publications
Release Date : 2013-06-19

Turn Down The Heat written by A Report for the World Bank by the Potsdam Institute for Climate Impact Research and Analytics. and has been published by World Bank Publications this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-06-19 with Climatic changes categories.

This report focuses on the risks of climate change to development in Sub-Saharan Africa, South East Asia and South Asia. Building on the 2012 report, Turn Down the Heat: Why a 4°C Warmer World Must be Avoided, this new scientific analysis examines the likely impacts of present day, 2°C and 4°C warming on agricultural production, water resources, and coastal vulnerability. It finds many significant climate and development impacts are already being felt in some regions, and that as warming increases from present day (0.8°C) to 2°C and 4°C, multiple threats of increasing extreme heat waves, sea-level rise, more severe storms, droughts and floods are expected to have further severe negative implications for the poorest and most vulnerable. The report finds that agricultural yields will be affected across the three regions, with repercussions for food security, economic growth, and poverty reduction. In addition, urban areas have been identified as new clusters of vulnerability with urban dwellers, particularly the urban poor, facing significant vulnerability to climate change. In Sub-Saharan Africa, under 3°C global warming, savannas are projected to decrease from their current levels to approximately one-seventh of total land area and threaten pastoral livelihoods. Under 4°C warming, total hyper-arid and arid areas are projected to expand by 10 percent. In South East Asia, under 2°C warming, heat extremes that are virtually absent today would cover nearly 60-70 percent of total land area in northern-hemisphere summer, adversely impacting ecosystems. Under 4°C warming, rural populations would face mounting pressures from sea-level rise, increased tropical cyclone intensity, storm surges, saltwater intrusions, and loss of marine ecosystem services. In South Asia, the potential sudden onset of disturbances to the monsoon system and rising peak temperatures would put water and food resources at severe risk. Well before 2°C warming occurs, substantial reductions in the frequency of low snow years is projected to cause substantial reductions in dry season flow, threatening agriculture. Many of the worst climate impacts could still be avoided by holding warming below 2°C, but the window for action is closing rapidly. Urgent action is also needed to build resilience to a rapidly warming world that will pose significant risks to agriculture, water resources, coastal infrastructure, and human health.

Oceanography Of The British Columbia Coast

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Author : Richard E. Thomson
language : en
Publisher:
Release Date : 1981

Oceanography Of The British Columbia Coast written by Richard E. Thomson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with Science categories.

This book deals with the physical aspects of the sea as exemplified by the Pacific Ocean and the contiguous waters of the British Columbia coast. Although principally devoted to waves, currents and tides, the book spans a broad spectrum of topics ranging from meteorology and marine biology to past and present marine geology. It attempts to elucidate the nature of oceanic motions and to relate them to everyday experience for the general interest of the casual reader and for the practical benefit of the professional mariner, scientist, or engineer.

The Global Carbon Cycle

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Author : Christopher B. Field
language : en
Publisher: Island Press
Release Date : 2012-09-26

The Global Carbon Cycle written by Christopher B. Field and has been published by Island Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-09-26 with Science categories.

While a number of gases are implicated in global warming, carbon dioxide is the most important contributor, and in one sense the entire phenomena can be seen as a human-induced perturbation of the carbon cycle. The Global Carbon Cycle offers a scientific assessment of the state of current knowledge of the carbon cycle by the world's leading scientists sponsored by SCOPE and the Global Carbon Project, and other international partners. It gives an introductory over-view of the carbon cycle, with multidisciplinary contributions covering biological, physical, and social science aspects. Included are 29 chapters covering topics including: an assessment of carbon-climate-human interactions; a portfolio of carbon management options; spatial and temporal distribution of sources and sinks of carbon dioxide; socio-economic driving forces of emissions scenarios. Throughout, contributors emphasize that all parts of the carbon cycle are interrelated, and only by developing a framework that considers the full set of feedbacks will we be able to achieve a thorough understanding and develop effective management strategies. The Global Carbon Cycle edited by Christopher B. Field and Michael R. Raupach is part of the Rapid Assessment Publication series produced by the Scientific Committee on Problems of the Environment (SCOPE), in an effort to quickly disseminate the collective knowledge of the world's leading experts on topics of pressing environmental concern.

Marketing Management

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Author : Johanne Brunet
language : en
Publisher:
Release Date : 2013-08

Marketing Management written by Johanne Brunet and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-08 with Marketing categories.