From The Agulhas To The South Atlantic
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From The Agulhas To The South Atlantic
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Author : Deirdre Byrne
language : en
Publisher: Universal-Publishers
Release Date : 2000-07-31
From The Agulhas To The South Atlantic written by Deirdre Byrne and has been published by Universal-Publishers this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000-07-31 with Science categories.
The Agulhas Retroflection transfers heat, salt and vorticity from the Indian Ocean to the South Atlantic. The transfer is accomplished by discrete meso-scale features and by the advection of a water column of mixed Atlantic and Indian Ocean origins. The objectives of this thesis are to measure the strength of the Agulhas-South Atlantic (ASA) exchange and to develop a generalized method for the measurement of mass and thermohaline fluxes. First, ASA mass and energy fluxes are estimated by using sea surface height (SSH) anomalies from satellite altimetry to monitor Agulhas eddies, a significant component of ASA transport. ~20 eddies are tracked from SSH during 1986 - 1989. Six eddies/year are observed entering the South Atlantic; when combined with information from hydrography this suggests minimum annual ASA mass and energy fluxes of O(5x10^6) m^3/s and O(10^17) J. Next, the accuracy of altimetric tide models, critical to measurements of ASA fluxes using altimetry, is evaluated in the Agulhas region by a comparison with in situ bottom pressure (BP). The CSR 3.0 model accounts for 98.5% - 99.4% of the variance in bottom pressure at four locations, with maximum discrepancies between model and in situ tides reaching 6.5 cm. In Enhanced Thermohaline Transport Analysis (ETTA), developed herein, vertically averaged thermohaline transport coefficients are parameterized as functions of SSH and acoustic travel time (tau). These quantities, which can be directly measured, are then used as proxies to determine mass and thermohaline fluxes from time-series of altimetric SSH and tau from inverted echo sounder moorings. Using ETTA, the 1992 - 1993 baroclinic-barotropic ASA fluxes through a moored array at 30S (2E - 17E) are estimated at O(14.5x10^6) m^3/s, O(15x10^20) J and O(83x10^12) kg salt per annum. Meso-scale eddies accomplish at least 18% of the transport. Lastly, ETTA is combined with the Gravest Empirical Mode (GEM) technique to create continuous parameterizations of temperature and salinity fields with pressure, tau and SSH. Thus tau and SSH become proxies for vertically resolved thermohaline profiles. With data from the Caribbean region, GEM-ETTA is shown to have the potential to resolve inter-ocean mass and thermohaline fluxes with time and depth.
The Agulhas And South Atlantic Current Components
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Author : Olaf Boebel
language : en
Publisher:
Release Date : 2017
The Agulhas And South Atlantic Current Components written by Olaf Boebel and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.
The Agulhas Current
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Author : Johann R.E. Lutjeharms
language : en
Publisher: Springer Science & Business Media
Release Date : 2006-08-26
The Agulhas Current written by Johann R.E. Lutjeharms and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-08-26 with Science categories.
Based on the research findings of 60 years, the author describes the origins of the Agulhas Current, its behaviour, its influence on the adjacent continental shelf, its effect on local weather and its role in linking the Indian and Atlantic Oceans. The text is well-illustrated and includes asides on the history of research on the Current. An exhaustive bibliography gives easy access to present knowledge on this important current system.
Agulhas Retroflection Rings In The South Atlantic Ocean
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Author : Christopher Michael Duncombe Rae
language : en
Publisher:
Release Date : 1994
Agulhas Retroflection Rings In The South Atlantic Ocean written by Christopher Michael Duncombe Rae and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.
The South Atlantic
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Author : Gerold Wefer
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
The South Atlantic written by Gerold Wefer and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
The book presents results of recent projects in oceanography and marine geosciences (e.g. WOCE, JGOFS, PAGES, ODP) regarding present and past circulation in the South Atlantic. The objective of the book is to integrate results from both oceanographic and geological studies. As the connecting link between the Antarctic and the North Atlantic, the South Atlantic plays a crucial role with regard to the heat budget of the North Atlantic and to the biogeochemical budget of the global ocean. New results from studies of meridional water mass and heat transports are presented. The central theme of geological investigations is the reconstruction of current and productivity systems in the South Atlantic during the late Quaternary.
The Agulhas And South Atlantic Current Components
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Author : Olaf Boebel
language : en
Publisher:
Release Date : 2000
The Agulhas And South Atlantic Current Components written by Olaf Boebel and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with categories.
Spreading History Of The South Atlantic South Of The Agulhas Fracture Zone From 65 Ma To 40 Ma
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Author : E. Lee Henson (IV)
language : en
Publisher:
Release Date : 1996
Spreading History Of The South Atlantic South Of The Agulhas Fracture Zone From 65 Ma To 40 Ma written by E. Lee Henson (IV) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Geology categories.
Where Three Oceans Meet
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Author : Sara L. Bennett
language : en
Publisher:
Release Date : 1988
Where Three Oceans Meet written by Sara L. Bennett and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Ocean currents categories.
The Agulhas Retroflection south of Africa lies at the junction of the S. Indian, S. Atlantic, and Circumpolar Oceans. A March 1985 survey, including hydrographic stations, subsurface current path survey, and contemporaneous sea surface temperature (SST) satellite infrared image, plus historical data, are used to characterize the region. In 1985, Agulhas transport was 56 to 95 Sv (1 million m/s; relative to 2400 dbar), up to 1.5 times the interior transport from linear theory and observed winds. Return Current transport was 54 and 65 Sv. The current retroflected in two branches. The surface warm core retroflected upstream of the second branch, while an SST front, and the subsurface current path survey, followed it. A cold ring, with 64 Sv transport but no SST anomaly, and a ware recirculation lay between the branches. Curvature vorticity at anticyclonic turns in the path exceeded the gradient wind maximum, so other dynamics must locally contribute. Salt, oxygen, and potential vorticity fronts on isopycnals in the current's upper approx. 300 m are observed, as are deep western boundary filaments of Red Sea Water and N. Atlantic Deep Water influences. The current meets baroclinic barotropic instability necessary conditions. Thermocline water (>8C) transport into the S. Atlantic is 2.8 to 9.6 Sv, less than the or = 10 Sv Atlantic export of deep water. Keywords: Agulhas currents, Oceanographic data; Optical data; Air water interactions; Western boundary current; Oceanographic fronts; Salinity; Ocean currents; Indian Ocean; South Atlantic Ocean. Theses. (edc).
A Sailing Directory For The Ethiopic Or Southern Atlantic Ocean
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Author : Alexander George Findlay
language : en
Publisher:
Release Date : 1883
A Sailing Directory For The Ethiopic Or Southern Atlantic Ocean written by Alexander George Findlay and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1883 with Pilot guides categories.
The Role Of The South Atlantic On The Interbasin And Pole To Pole Connections
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Author : Ronald Buss de Souza
language : en
Publisher: Frontiers Media SA
Release Date : 2023-03-01
The Role Of The South Atlantic On The Interbasin And Pole To Pole Connections written by Ronald Buss de Souza and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-03-01 with Science categories.