Добрый день, Коллеги. Важное сообщение, просьба принять участие. Музей Ферсмана ищет помощь для реставрационных работ в помещении. Подробности по ссылке
The examination into the sediments of the Western Guiana shelf, the results. of which are recorded in the present report forms part of the study of the continental shelf deposits off the Orinoco delta. The initiative to this investigation was taken by Prof. Dr Ph. H. KUENEN, Director of the Institute of Marine Geology of Groningen University (Holland); the ‘“‘Bataafsche Petroleum Maatschappij N.V.” of The Hague, by their support, have rendered the necessary expeditions possible. The area of investigation, lying off the Orinoco delta in the N.E. of South America, extends from the Venezuelan Testigos Islands in the N.W. to the shelf area off the Essequibo river mouth in British Guiana in the S.E., from nearshore up to the region of the shelf edge (Fig. 1). <...>
Caves occupy incongruous positions in both our culture and our science. The oldest records of modem human culture are the vivid cave paintings from southern France and northern Spain, which are in some cases more than 30,000 years old (Chauvet, et al, 1996). Yet, to call someone a "caveman" is to declare them primitive and ignorant. Caves, being cryptic and mysterious, occupied important roles in many cultures. For example, Greece, a country with abundant karst, had the oracle at Delphi and Hades the god of death working from caves. People are both drawn to and mortified by caves.
The modern geological sciences are characterized by extraordinarily rapid progress, as well as by the development and application of numerous new and refined methods, most of them handling an enormous amount of data available from all the continents and oceans. Given this state of affairs, it seams inevitable that many students and professionals tend to become experts in relatively narrow fields and thereby are in danger of losing a broad view of current knowledge.
Worldwide the majority of water bodies (rivers, reservoirs and lakes) are no longer in a natural morphodynamic status due to anthropogenic interventions in the catchment area as well as in the river itself. Alterations in the catchment, e.g. uprooting, may lead to high sediment intrusions in river systems even during relatively short precipitation events. The effect of high suspended load concentration and the intrusion of fine sediments (clogging) result in a reduction of habitat quality for many aquatic species. Furthermore, the low water quality can negatively affect both macroinvertebrates as well as microbial organisms on the sediment bed due to increased turbidity as well as sediment smothering that alter the light climate and oxygen penetration, respectively.
The current book continues the work of Winterwerp and Van Kesteren (2004) and Mehta (2013). Our main objective is to provide guidelines for good modeling practice to quantify the transport and fate of fine sediment in open water, with emphasis on the marine environment. We emphasize that a (numerical) model should never be an objective by itself. It is always a tool to help answering managerial or engineering questions, or to enhance our understanding of nature. Yet, in this book we do not elaborate on how to use a model as a tool, as this is too unique an issue.
Многие месторождения центральной части Западной Сибири находятся на поздней стадии разработки. В настоящее время проблемой является выяснение причин неравномерности выработки запасов на нефтяных месторождениях. Нет четкого понимания причин образования зон с повышенными остаточными запасами нефти, а также, почему разработка одного объекта идёт по-разному в разных его частях.
Изучение особенностей позднечетвертичного осадконакопления в ключевых районах океана под влиянием глобальных климатических изменений является одной из фундаментальных научных проблем. Долины трансформных разломов срединноокеанических хребтов представляют собой узкие каналы, контролирующие распространение придонных и глубинных вод между абиссальными котловинами. Эти глубоководные проходы играют важную роль в обмене вод, тепла, растворенного кислорода, питательных веществ и биоты между океаническими бассейнами.
Scientific research on sediment dynamics in the coastal zone and along the littoral zone has evolved considerably over the last four decades. It benefits from a technological revolution that provides the community with cheaper or free tools for in situ study (e.g., sensors, gliders), remote sensing (satellite data, video cameras, drones) or modelling (open source models). These changes favour the transfer of developed methods to monitoring and management services.
TYSON, R. V. & PEARSON, T. H. Modern and ancient continental shelf anoxia: an overview Modern shelf anoxia BOESCH, D. F. & RABALAIS, N. N. Effects of hypoxia on continental shelf benthos: comparisons between the New York Bight and the Northern Gulf of Mexico RABALAIS, N. N., TURNER, R. E., WISEMAN, W. I. Jr. & BOESCH, D. F. A brief summary of hypoxia on the northern Gulf of Mexico continental shelf: 1985-1988 HARPER, D. E. Jr., MCKINNEY, L.D., NANCE, J. M. & SALTER, R. R. Recovery responses of two benthic assemblages following an acute hypoxic event on the Texas continental shelf, northwestern Gulf of Mexico VAN DER ZWAAN, G. J. & JORISSEN, F. J. Biofacial patterns in river-induced shelf anoxia
