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Thursday, August 6, 2020 | History

1 edition of The structure and circulation of deep and bottom waters in the Antarctic Ocean found in the catalog.

The structure and circulation of deep and bottom waters in the Antarctic Ocean

by Jeffrey Edwin Callahan

  • 3 Want to read
  • 32 Currently reading

Published by Johns Hopkins University .
Written in English

    Subjects:
  • Oceanography

  • The Physical Object
    Paginationp. ;
    ID Numbers
    Open LibraryOL25266958M

    In ocean current: Thermohaline circulation is converted to the cold Antarctic Bottom Water and Antarctic Intermediate Water. The southward and upwelling deep water, which carries heat injected into the deep ocean by processes farther north, is balanced by the northward spread of cooler, fresher, oxygenated water masses of the Southern Ocean. Sutton, R. T., and D. L. R. Hodson, Atlantic Ocean forcing of North American and European summer climate. Science, , Nunes, F., and R.D. Norris.

      The abyssal ocean is primarily filled by Antarctic Bottom Water (AABW), a cold, dense water mass produced around Antarctica that spreads northward to cover most of the World Ocean floor (Johnson ).While sinking and spreading along the seabed, the densest, newly formed AABW entrain and mix with ambient Southern Ocean waters to reach a maximum northward flow of about 20–30 Cited by: Here, the focus is on describing interaction processes between internal waves and deep currents in the ocean, especially currents of Antarctic Bottom Water in abyssal fractures. They also touch on the problem of oceanic circulation and related processes in fjords, including those occurring under sea ice.

    Circumpolar Deep Water (CDW) is a key component of the Antarctic Circumpolar Current[3]. In the Amundsen Sea, CDW is found near to the shelf break, where the continental shelf acts as a large topographic barrier for the majority of the deep water. This book is dedicated to the study of structure and transport of deep and bottom waters above and through underwater channels of the Atlantic Ocean. The study is based on recent observations, analysis of historical data, and literature reviews. This approach allows us to understand how water transport and water mass proper-.


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The structure and circulation of deep and bottom waters in the Antarctic Ocean by Jeffrey Edwin Callahan Download PDF EPUB FB2

The purpose of this note is to examine the structure of the deep water in the entire circumpolar region south of Some aspects of the deep circulation in the Antarctic are discussed, with special attention being paid to the meridional exchange of abyssal waters Cited by: Thermohaline Circulation The surface currents we have discussed so far are ultimately driven by the wind, and since they only involve surface water they only affect about 10% of the ocean’s volume.

However, there are other significant ocean currents that are independent of the wind, and involve water movements in the other 90% of the ocean. Unradiogenic seawater Nd isotopic compositions, reconstructed from fish teeth at intermediate/deep Indian Ocean pelagic sites (Ocean Drilling Program (ODP) Sites and and Deep Sea Drilling Project (DSDP) Site ), indicate a dominant Southern Ocean‐sourced contribution to regional deep waters (ε Nd(t) = − ± ).

IODP Site Cited by: Antarctic Bottom Water is formed at a few sites along the continental margin of Antarctica during the winter months (Figure 2).The shelf dense water slips across the shelf break to descend to the deep ocean, perhaps within the confines of incised canyons on the continental slope.

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.

Grouping the current meters by depth and density class provides direct transport estimates for two Southern Ocean origin water masses: Lower Circumpolar Deep Water ( ≤ γ n ≤ kg m −3) and Antarctic Bottom Water (γ n ≥ kgm −3).

Basin LCDW and AABW transport ranges are to Sv and to Sv, by: ISBN: OCLC Number: Description: xxii, pages: illustrations ; 24 cm: Contents: Geological and geophysical characteristics of the transform fault zones --Deep water masses of the South and North Atlantic --Source regions, Abyssal pathways, and bottom flow channels (for waters of the Antarctic origin) --Exchange between the.

Get this from a library. Abyssal channels in the Atlantic Ocean: water structure and flows. [E G Morozov;] -- 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.

Abyssal Channels in the Atlantic Ocean: Water Structure and Flows Eugene G. Morozov, Alexander N. Demidov, Roman Y. Tarakanov, Walter Zenk (auth.) This book is dedicated to the study of structure and transport of deep and bottom waters through underwater channels of the Atlantic Ocean.

“These waters are thought to be the underpinning of the large-scale global ocean circulation,” said Macdonald, a WHOI senior research specialist and the study’s co-author.

“Antarctic Bottom Water gets its characteristics from the atmosphere—for example, dissolved carbon. ate, deep, and bottom layers are more or less continu­ ous across the Antarctic Convergence. REVIEW OF ANTARCTIC OCEANOGRAPHY The basic structure and circulation of antarctic and subantarctic waters have been extensively studied by Dean [] and other members of the Discovery Expeditions.

Table 1 lists the major general antarctic. The Southern Ocean, also known as the Antarctic Ocean or the Austral Ocean, comprises the southernmost waters of the World Ocean, generally taken to be south of 60° S latitude and encircling Antarctica.

As such, it is regarded as the second-smallest of the five principal oceanic divisions: smaller than the Pacific, Atlantic, and Indian Oceans but larger than the Arctic Ocean. Determine "climate" of Antarctic Bottom Water through knowledge of * Properties of water masses * Rate of renewal of deep circulation Determine relation between water-mass formation and ocean-atmosphere exchanges for parameterization into global circulation models.

This book is dedicated to the study of structure and transport of deep and bottom waters above and through underwater channels of the Atlantic Ocean. The study is based on recent observations, analysis of historical data, and literature : Eugene G.

Morozov, Alexander N. Demidov, Roman Y. Tarakanov. Antarctica is also the birthplace of deep ocean waters that make up part of the global Ocean Conveyor. Water that flows at the bottom of the ocean is formed on the continental shelf, particularly in the Weddell Sea and the Ross Sea.

As ice forms the water becomes saltier. Antarctic Bottom Water can be found at the very bottom of the ocean, directly overlaying the sea floor. This cold, salty, and dense water spreads. The expansion of Antarctic-origin abyssal waters, richer in nutrients and metabolic carbon than the deep Arctic-origin waters it replaced, is believed to have reduced atmospheric CO 2 by 10–20 ppm ().Concomitant changes in the ocean circulation, stratification, biological nutrient uptake, and carbonate compensation have been invoked to account for the full 80–90 ppm drawdown ().Cited by:   In the cold depths along the sea floor, Antarctic Bottom Waters are part of a global circulatory system, supplying oxygen- carbon- and nutrient-rich waters to.

A thorough understanding of the Pacific Ocean circulation is a necessity to solve global climate and environmental problems.

Here we present a new picture of the circulation by integrating observational results. Lower and Upper Circumpolar Deep Waters (LCDW, UCDW) and Antarctic Intermediate Water (AAIW) of 12, 7, and 5 Sv ( m3s−1) in the lower and upper deep layers and Cited by:   TY - JOUR.

T1 - Circulation of Antarctic intermediate water in the South Indian Ocean. AU - Fine, Rana A. PY - / Y1 - / N2 - Chlorofluorocarbon (CFC) and hydrographic data collected on the R.R.S. Charles Darwin Cruise 29 along 32°S during November-Decemberare used to examine the circulation in the South Indian by:.

The Antarctic bottom water can be found at the very bottom of the ocean, directly overlaying the sea floor. This cold, salty, and therefore dense water spreads across the very deep, abyssal (greater than m) plains of the global ocean and can be found as far north as the equator.The thermohaline circulation of the deep oceans results from temperature and salinity variations, which control the density of ocean waters.

Elaborate. A. Cold, saline water is formed in the North Atlantic and in the Weddell Sea off Antarctica. Its main impact in the overall ocean circulation is its contribution to the formation of North Atlantic Deep Water (NADW) in the depth range between m and m.

Antarctic Bottom Water (AABW) is a type of water in the seas surrounding Antarctica with temperatures ranging from 0 to oC, salinities from toand a density near.