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• Morozov, Eugene G. - Abyssal channels in the atlantic ocean: water structure and flows.

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Contenido

This book is dedicated to the study of structure and transport of deep and bottom waters through underwater channels of the Atlantic Ocean. The study is based on recent observations, analysis of historical data, and a literature review. A strong flow of Antarctic Bottom Water from the Argentine Basin to the Brazil Basin through the Vema Channel (32?-27? S) is studied on the basis of CTD sections combined with annual LADCP profiling and long-term moored measurements. The flow in the Vema Channel is mixed in the vertical direction but horizontally stratified. The mean speed of the flow is 30 cm/s and water transport is approximately 3.5 Sv. Owing to the bottom Ekman friction the dense core of the flow is usually displaced to the eastern wall of the channel. A temperature increase was found in the deep Vema Channel, and has been under observation for the past 30 years. The further flow of bottom water in the Brazil Basin splits in the northern part of the basin. A portion of the water flows to the East Atlantic basins through the Romanche and Chain fracture zones. The iremainder becomes a northwestern flow to the North American Basin. Part of the northwesterly flow propagates through the Vema Fracture Zone (11? N) into the Northeastern Atlantic basins. Flows in the Romanche, Chain, and Vema fracture zones were studied recently by CTD and LADCP profiling. An underwater cataract was found in the Chain fracture Zone. Recent measurements in the Kane Gap show that the flow of bottom water there is characterized by alternative transport in time. The Northeastern Atlantic basins are filled with the bottom water flowing through the Vema Fracture Zone. The flows of bottom waters through the Romanche and Chain fracture zones do not spread to the Northeast Atlantic due to strong mixing in the equatorial zone and enhanced transformation of bottom water properties. Includes: Data can be downloaded from http://extras.springer.com Concise and comprehensive overview of measurements in abyssal channels Describes flows in most important channels of the Atlantic Ocean Combines measurements in the deep ocean and numerical modeling The analysis is based on recent measurements (2001 and later) The data were collected within international projects on climate variability WOCE and CLIVAR

   INDICE: Foreword.- List of abbreviations.- Preface.- Acknowledgements.- 1.Geological and geophysical characteristics of the transform fault zones.- 2. Deep water masses of the South and North Atlantic.- 3. Source Regions, Abyssal Pathways, and Bottom Flow Channels (for waters of the Antarctic origin).- 4. Exchange between the Argentine and Brazil basins; Abyssal pathways and bottom flow channels (for waters of the Antarctic origin).- 5. Further propagation of Antarctic Bottom Water from the Brazil Basin.- 6. Flows through the Mid-Atlantic Ridge in the northern channels. Charlie Gibbs Fracture Zone and other fracture zones.- Integrated conclusions.- References.- Index."

Detalles del artículo

• Páginas : 280
• Editorial : Springer
• Idioma : Inglés
• Fecha de Publicación : 01/08/2010
• ISBN: 9789048193578
• Encuadernación : Cartoné
• Nº Volúmenes : 1
• País de Publicación : Holanda