scholarly journals Evidence that Agulhas Current transport is maintained during a meander

2014 ◽  
Vol 119 (6) ◽  
pp. 3806-3817 ◽  
Author(s):  
Greta M. Leber ◽  
Lisa M. Beal
Keyword(s):  
Current Transport ◽  
Agulhas Current

scholarly journals Impact of the Indonesian Throughflow on Agulhas leakage

Ocean Science ◽  
2013 ◽  
Vol 9 (5) ◽  
pp. 773-785 ◽  
Author(s):  
D. Le Bars ◽  
H. A. Dijkstra ◽  
W. P. M. De Ruijter
Keyword(s):  
Large Scale ◽  
Ocean Model ◽  
Global Ocean ◽  
Momentum Balance ◽  
Indonesian Throughflow ◽  
Current Transport ◽  
Flat Bottom ◽  
Agulhas Current ◽  
The Pacific ◽  
Wide Range

Abstract. Using ocean models of different complexity we show that opening the Indonesian Passage between the Pacific and the Indian oceans increases the input of Indian Ocean water into the South Atlantic via the Agulhas leakage. In a strongly eddying global ocean model this response results from an increased Agulhas Current transport and a constant proportion of Agulhas retroflection south of Africa. The leakage increases through an increased frequency of ring shedding events. In an idealized two-layer and flat-bottom eddy resolving model, the proportion of the Agulhas Current transport that retroflects is (for a wide range of wind stress forcing) not affected by an opening of the Indonesian Passage. Using a comparison with a linear model and previous work on the retroflection problem, the result is explained as a balance between two mechanisms: decrease retroflection due to large-scale momentum balance and increase due to local barotropic/baroclinic instabilities.

scholarly journals Decoupling of the Agulhas Leakage from the Agulhas Current

2014 ◽  
Vol 44 (7) ◽  
pp. 1776-1797 ◽  
Author(s):  
Benjamin R. Loveday ◽  
Jonathan V. Durgadoo ◽  
Chris J. C. Reason ◽  
Arne Biastoch ◽  
Pierrick Penven
Keyword(s):  
Wind Stress ◽  
Ocean Basin ◽  
Global Ocean ◽  
Trade Wind ◽  
Current Transport ◽  
Trade Winds ◽  
Agulhas Current ◽  
Basin Scale ◽  
Stress Changes ◽  
The Indian Ocean

Abstract The relationship between the Agulhas Current and the Agulhas leakage is not well understood. Here, this is investigated using two basin-scale and two global ocean models of incrementally increasing resolution. The response of the Agulhas Current is evaluated under a series of sensitivity experiments, in which idealized anomalies, designed to geometrically modulate zonal trade wind stress, are applied across the Indian Ocean Basin. The imposed wind stress changes exceed plus or minus two standard deviations from the annual-mean trade winds and, in the case of intensification, are partially representative of recently observed trends. The Agulhas leakage is quantified using complimentary techniques based on Lagrangian virtual floats and Eulerian passive tracer flux. As resolution increases, model behavior converges and the sensitivity of the leakage to Agulhas Current transport anomalies is reduced. In the two eddy-resolving configurations tested, the leakage is insensitive to changes in Agulhas Current transport at 32°S, though substantial eddy kinetic energy anomalies are evident. Consistent with observations, the position of the retroflection remains stable. The decoupling of Agulhas Current variability from the Agulhas leakage suggests that while correlations between the two may exist, they may not have a clear dynamical basis. It is suggested that present and future Agulhas leakage proxies should be considered in the context of potentially transient forcing regimes.

scholarly journals Seasonal Phasing of Agulhas Current Transport Tied to a Baroclinic Adjustment of Near‐Field Winds

2018 ◽  
Vol 123 (10) ◽  
pp. 7067-7083 ◽  
Author(s):  
Katherine Hutchinson ◽  
Lisa M. Beal ◽  
Pierrick Penven ◽  
Isabelle Ansorge ◽  
Juliet Hermes
Keyword(s):  
Near Field ◽  
Current Transport ◽  
Agulhas Current ◽  
Baroclinic Adjustment

scholarly journals Impact of the Indonesian throughflow on Agulhas leakage

2013 ◽  
Vol 10 (1) ◽  
pp. 353-391 ◽  
Author(s):  
D. Le Bars ◽  
H. A. Dijkstra ◽  
W. P. M. De Ruijter
Keyword(s):  
Indian Ocean ◽  
Ocean Model ◽  
Global Ocean ◽  
Indonesian Throughflow ◽  
Current Transport ◽  
Flat Bottom ◽  
Agulhas Current ◽  
The Pacific ◽  
Wide Range ◽  
The Indian Ocean

Abstract. Using ocean models of different complexity we show that opening the Indonesian Passage between the Pacific and the Indian Ocean increases the input of Indian Ocean water into the South Atlantic via the Agulhas leakage. In a strongly eddying global ocean model this response results from an increased Agulhas Current transport and a constant proportion of Agulhas retroflection south of Africa. The leakage increases through an increased frequency of ring shedding events. In an idealized two-layer and flat-bottom eddy resolving model, the proportion of the Agulhas Current transport that retroflects is (for a wide range of wind stress forcing) not affected by an opening of the Indonesian Passage. A linear ocean model is not able to explain this behavior which reveals the importance of mixed barotropic/baroclinic instabilities in controlling the Agulhas leakage.

BIOGENIC OPAL PRODUCTION IN THE AGULHAS CURRENT AND ITS CONNECTION TO ARIDIFICATION IN SOUTH AFRICA DURING THE MID-PLEISTOCENE

2018 ◽  
Author(s):  
Eduardo Ruiz Marin ◽  
◽  
Jason Coenen ◽  
Reed P. Scherer ◽  
Nathan D. Stansell ◽  
...  
Keyword(s):  
South Africa ◽  
Agulhas Current ◽  
Biogenic Opal

Current Transport Mechanism of High-Performance Novel GaN MIS Diode

2021 ◽  
Vol 42 (3) ◽  
pp. 304-307
Author(s):  
Tao Zhang ◽  
Yanni Zhang ◽  
Jincheng Zhang ◽  
Xiangdong Li ◽  
Yueguang Lv ◽  
...  
Keyword(s):  
Transport Mechanism ◽  
High Performance ◽  
Current Transport ◽  
Current Transport Mechanism ◽  
Mis Diode

scholarly journals Leakage current transport mechanisms of La0.67Sr0.33MnO3/BaTiO3 bilayer films grown on Nb:SrTiO3

2015 ◽  
Vol 38 (3) ◽  
pp. 725-729 ◽  
Author(s):  
PAN RUIKUN ◽  
LIU PANKE ◽  
LI MINGKAI ◽  
TAO HAIZHENG ◽  
LI PAI ◽  
...  
Keyword(s):  
Leakage Current ◽  
Current Transport ◽  
Transport Mechanisms ◽  
Bilayer Films

Current Transport in Ti/Al/Ni/Au Ohmic Contacts to GaN and AlGaN

2007 ◽  
Vol 556-557 ◽  
pp. 1027-1030 ◽  
Author(s):  
Ferdinando Iucolano ◽  
Fabrizio Roccaforte ◽  
Filippo Giannazzo ◽  
A. Alberti ◽  
Vito Raineri
Keyword(s):  
Contact Resistance ◽  
Field Emission ◽  
Ohmic Contacts ◽  
Theoretical Models ◽  
Specific Contact Resistance ◽  
Strong Increase ◽  
Current Transport ◽  
Electrical Characteristics ◽  
Structural And Electrical Properties ◽  
Specific Contact

In this work, the structural and electrical properties of Ti/Al/Ni/Au contacts on n-type Gallium Nitride were studied. An ohmic behaviour was observed after annealing above 700°C. The structural analysis showed the formation of an interfacial TiN layer and different phases in the reacted layer (AlNi, AlAu4, Al2Au) upon annealing. The temperature dependence of the specific contact resistance demonstrated that the current transport occurs through thermoionic field emission in the contacts annealed at 600°C, and field emission after annealing at higher temperatures. By fitting the data with theoretical models, a reduction of the Schottky barrier from 1.21eV after annealing at 600°C to 0.81eV at 800°C was demonstrated, together with a strong increase of the carrier concentration at the interface. The reduction of the contact resistance upon annealing was discussed by correlating the structural and electrical characteristics of the contacts.

Current transport in bistable granular structures

1975 ◽  
Vol 17 (8) ◽  
pp. 939-943 ◽  
Author(s):  
A. Moser ◽  
H. Rohrer
Keyword(s):  
Current Transport
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