Download or read book A Study of the Large Scale Circulation and Water Mass Formation in the Nordic Seas and Arctic Ocean written by and published by . This book was released on 1994 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Study of the Large Scale Circulation and Water Mass Formation in the Nordic Seas and Arctic Ocean written by Cecilie Mauritzen and published by . This book was released on 1993 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, production of dense water that feeds the dense overflows across the Greenland-Scotland Ridge has been considered A new circulation scheme is developed which is consistent with the water masses, currents and air-sea fluxes in the region, and with the important observation that the dense overflows show little or no seasonal or interannual variability. An inverse box model has been constructed that shows that the new circulation scheme is consistent with conservation statements for mass, heat and salt as well. According to the new circulation scheme the major buoyancy is lost in the North Atlantic Current, which enters the Norwegian Sea between Iceland and Scotland, and flows northward towards the Arctic Ocean and the Barents Sea. The transformation is due to a large net annual heat loss over the North Atlantic Current, combined with a long residence time (2-3 years) and a large surface area. After subduction, one branch of the North Atlantic Current enters the Arctic Ocean, is modified in hydrographic properties into those associated with the Denmark Strait Overflow Waters in the western North Atlantic, exits the Arctic Ocean in the western Fram Strait and flows with the East Greenland Current towards the Denmark Strait Another branch of the North Atlantic Current recirculates directly in the Fram Strait and flows towards the Denmark Strait with the East Greenland Current This branch will not sink to the bottom of the North Atlantic as it is less compressible than the Arctic branch. The third branch of the North Atlantic Current enters the Barents Sea, continues to lose buoyancy, and enters the Arctic Ocean at intermediate depth. This branch exits the Arctic Ocean in the western Fram Strait, circulates around the Greenland Sea, enters the Norwegian Sea, and flows towards the Faeroe-Shetland Channel. The traditional view holds that the major sources of the dense overflows are the Iceland and Greenland gyres, west of the North Atlantic Current. Aside from the finding that the new circulation scheme is more likely in terms of water mass properties, currents etc., one fundamental problem with the old scheme lies with supplying a substantial overflow. There are indications that the production of dense water in the gyres is sensitive to the highly variable surface conditions and that indeed the production tends to shut on and off. The reservoirs in the gyres are so small that they would be drained within a few years if they were to supply the overflows during a shutdown period. Production of dense water within the North Atlantic Current is less sensitive to surface conditions. The density in the gyres is gained at a temperature around freezing, whereas in the North Atlantic Current the density is gained well above freezing. Therefore a freshwater anomaly in the two domains will have different consequences for vertical · overturning: within the North Atlantic Current the freshening can be overcome by further cooling, whereas in the gyres freezing will occur and the vertical overturning will cease. The observed lack of a significant seasonal signal associated with the dense overflows is consistent with the new circulations scheme. The net annual cooling dominates the seasonal oscillation in the atmospheric heat loss for time scales comparable with the residence time of the Atlantic Water within the domain. Thus winter formation of dense water within the North Atlantic Current does not induce a seasonal signal in the transport field of the dense water.
Download or read book The Nordic Seas written by Burton G. Hurdle and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt: " ... as soon as one has traversed the greater part of the wild sea, one comes upon such a huge quantity of ice that nowhere in the whole world has the like been known." "This ice is of a wonderful nature. It lies at times quite still, as one would expect, with openings or large fjords in it; but sometimes its movement is so strong and rapid as to equal that of a ship running before the wind, and it drifts against the wind as often as with it." Kongespeilet - 1250 A.D. ("The Mirror of Kings") Modern societies require increasing amounts influence on the water mass and on the resulting of scientific information about the environment total environment of the region; therefore, cer tain of its characteristics will necessarily be in whieh they live and work. For the seas this information must describe the air above the sea, included.
Download or read book The Nordic Seas written by Helge Drange and published by American Geophysical Union. This book was released on 2005-01-14 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 158. The world's largest positive temperature deviation from zonal mean temperatures lies within the realm of the Nordic Seas, comprising bodies of water variously referred to as the Norwegian Sea, the Iceland Sea, and the Greenland Sea. Its role as a mixing cauldron for waters entering from the North Atlantic and the Arctic Oceans, and its function as a major source of deep and abyss water, make our understanding of the Nordic Seas a crucial element in advancing the knowledge of climate dynamics in the Northern Hemisphere. In this context, its small extent (covering only 0.75% of the area of the world's oceans) and its unique location, which allows for accessibility and detailed exploration, are of special significance. The current book speaks to that significance specifically and also to assessing the region's present and future response to, and influence on, global climate change. It is the first such work since B. G. Hurdle's groundbreaking The Nordic Seas (published in 1986).
Download or read book Journal of Physical Oceanography written by and published by . This book was released on 2005 with total page 1204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Arctic Subarctic Ocean Fluxes written by Robert R. Dickson and published by Springer Science & Business Media. This book was released on 2008-03-04 with total page 728 pages. Available in PDF, EPUB and Kindle. Book excerpt: We are only now beginning to understand the climatic impact of the remarkable events that are now occurring in subarctic waters. Researchers, however, have yet to agree upon a predictive model that links change in our northern seas to climate. This volume brings together the body of evidence needed to develop climate models that quantify the ocean exchanges through subarctic seas, measure their variability, and gauge their impact on climate.
Download or read book The Physical Oceanography of the Arctic Mediterranean Sea written by Bert Rudels and published by Elsevier. This book was released on 2021-09-19 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Physical Oceanography of the Arctic Mediterranean Sea describes the circulation and the processes in the Arctic Mediterranean, how our present knowledge has developed, and presents recent changes caused by a gradually warmer global climate.The Arctic Mediterranean Sea has been intensively studied in recent years, especially during the fourth International Polar Year, 2007–09, and we have become increasingly aware of the changes presently taking place. This book collects and presents newly acquired knowledge and sets it in perspective to previous studies. Authored by a world-renowned leader in the field, this book explores the role of this small but important sea in the global oceanic circulation and climate—a must-read for researchers and students in the fields of oceanography and climate science. - Relates observed features to active processes and provides sufficient background information to understand the theoretical explanations - Presents the Arctic Mediterranean Sea in the context of global ocean circulation and climate - Presents a modern, comprehensive, and coherent treatment of Arctic (and subarctic) physical oceanography
Download or read book The Freshwater Budget of the Arctic Ocean written by Edward Lyn Lewis and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 631 pages. Available in PDF, EPUB and Kindle. Book excerpt: Following a decision by the Arctic Ocean Sciences Board (AOSB) in July 1996 the then chainnan, Geoffrey Holland, wrote a letter of invitation to a meeting to plan a "Symposium on the Freshwater Balance of the Arctic". The meeting was held in Ottawa on November 12-13 1996 and was attended by representatives of various organisations, including the U.S. National Science Foundation (NSF), as well as individual scientists. Results of this meeting included: • Co-sponsorship with AOSB by the Scientific Committee on Ocean Research (SCOR), the Arctic Climate System Study (ACSYS) and the Global Energy and Water Cycle Experiment (GEWEX). • A decision to apply for funding as a Advanced Research Workshop (ARW) of the North Atlantic Treaty Organisation (NATO) Scientific Affairs Division. • That expenses would be covered in part by funds available through an existing NSF grant to the SCOR Executive offices in Baltimore, MD. • The appointment of myself to be Chairman/Manager for the Symposium. • Provision of a recommended list of Scientific Advisors to assist the Chainnan in selecting key speakers.
Download or read book Deep Convection and Deep Water Formation in the Oceans written by Simon Chu and published by Elsevier. This book was released on 1991-09-17 with total page 395 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains articles presenting current knowledge about the formation and renewal of deep waters in the ocean. These articles were presented at an international workshop at the Naval Postgraduate School in Monterey in March 1990. It is the first book entirely devoted to the topic of deep water formation in which articles have been both selected and reviewed, and it is also the first time authors have addressed both surface and deep mixed layers. Highlighted are: past and recent observations (description and analysis), concepts and models, and modern techniques for future research. Thanks to spectacular advances realised in computing sciences over the last twenty years this volume includes a number of sophisticated numerical models. Observational as well as theoretical studies are presented and a clear distinction is established between open-ocean deep convection and shelf processes, both leading to deep- and bottom-water formation. The main subject addressed is the physical mechanism by which the deep water in the ocean can be renewed. Ventilation occurs at the surface in areas called the gills, where water is mixed and oxygenated before sinking and spreading in the abyss of the deep ocean. This phenomenon is a very active area for both experimentalists and theoreticians because of its strong implications for the understanding of the world ocean circulation and Earth climate. This major theme sheds light on specific and complex processes happening in very restricted areas still controlling three quarters of the total volume of the ocean. All articles include illustrations and a bibliography. This book will be of particular interest to physical oceanographers, earth scientists, environmentalists and climatologists.
Download or read book Berichte zur Polar und Meeresforschung written by and published by . This book was released on 2000 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Arctic Research of the United States written by and published by . This book was released on 1987 with total page 812 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of Atmospheric and Oceanic Technology written by and published by . This book was released on 2000 with total page 928 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ormen Lange an integrated study for safe field development in the Storegga submarine area written by A. Solheim and published by Newnes. This book was released on 2012-12-02 with total page 327 pages. Available in PDF, EPUB and Kindle. Book excerpt: Great effort has been undertaken to investigate potential geohazards in relation to the development of the Ormen Lange gas field offshore Mid-Norway. The field is located in the scar left after the giant, tsunami-generating Storegga Slide, which occurred roughly 8200 years ago, and the slide risk has consequently received particular focus. The studies have been multi-disciplinary in character, and have involved a number of companies, universities, and research institutions. The results of the project led to a significant advance in the understanding of the Storegga Slide in particular, and submarine slope instability in general, and played an important role in the approval of field development by Norwegian authorities. This book comprises 26 individual contributions representing the wide span of topics addressed in the project. The main scope is to provide a state-of-the-art report on geohazard investigations in a high latitude continental margin setting. Most of the data and results published in this book would not have reached beyond the confidential report stage unless the license partners of the Ormen Lange license had agreed that this information deserves a wider audience. - Multidisciplinary and covers most themes treated in slope stability studies prior to the field development phase - Provides a link between basic research and applied geohazard studies, with direct relevance for risk evaluation in relation to field development activities, such as pipeline design, drilling of wells, structure foundation etc. - A state-of-the-art report on geohazard investigations in a high latitude continental margin setting in relation to field development activities
Download or read book Variability of the Circulation in the European Polar Seas written by Peter Schlosser and published by . This book was released on 1999 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our primary goal was to study formation rates, pathways and mean residence times of the deep waters in the basins of the European Polar Seas. Evaluation of the tritium/(exp 3)He time series for the Greenland Sea Deep Water spanning the period between 1972 and 1988 yielded the surprising result of a drastic reduction in Greenland Sea Deep Water formation from about 0.5 Sv to 0.1 Sv starting around 1980. However, this drastic change produces only a very small hydrographic signature of the order of 0.005 psu and 0.1 deg C which is not large enough for quantification of the change of the deep water formation rate. Therefore, tracer studies are a unique tool for studies of variability of ocean circulation on a time scale of several years to several decades. Our initial focus was on quantification of variability of Greenland Sea Deep Water formation because this water mass is fairly homogeneous and is relatively well sampled. In the framework of the AASERT grant we planned to extend the evaluation of our tracer time series to the shallow water column of the Greenland Sea and to other basins of the Eurasian Polar Seas.
Download or read book Ocean Circulation written by Open Open University and published by Elsevier. This book was released on 2001-09-17 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: This second edition retains the general structure of the first edition, buthas been updated in the light of recent oceanographic research, and improvedas a teaching text on the basis of feedback from past students and otherreaders.Notable additions include new sections addressing the topic ofnumerical modelling, and more discussion of natural oscillations in theocean-atmosphere system (previously confined to the El Niño phenomenon). Inparticular, the Chapter on the North Atlantic now includes a discussion ofthe North Atlantic Oscillation, as well as of the Great Salinity Anomaly. Inthe final Chapter, treatment of water mass formation has been updated toreflect recent ideas about the processes involved and how they relate toclimatic change over different time-scales, from decades to millennia.High quality full colour diagramsSubstantial chapter summaries ideal for revisionAnswers, hints and notes for questions at back of the book
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1994 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book YOUMARES 8 Oceans Across Boundaries Learning from each other written by Simon Jungblut and published by Springer. This book was released on 2018-08-29 with total page 259 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book presents the proceedings volume of the YOUMARES 8 conference, which took place in Kiel, Germany, in September 2017, supported by the German Association for Marine Sciences (DGM). The YOUMARES conference series is entirely bottom-up organized by and for YOUng MARine RESearchers. Qualified early career scientists moderated the scientific sessions during the conference and provided literature reviews on aspects of their research field. These reviews and the presenters’ conference abstracts are compiled here. Thus, this book discusses highly topical fields of marine research and aims to act as a source of knowledge and inspiration for further reading and research.
