Australia's Antarctic (Southern Ocean) Fisheries: A Case Study of the Development of Trans-National Capitalism

2006 ◽  
Vol 18 (2) ◽  
pp. 323-350
Author(s):  
Sally R. May
Keyword(s):  
Southern Ocean

scholarly journals Disturbance, dispersal and marine assemblage structure: A case study from the nearshore Southern Ocean

2020 ◽  
Vol 160 ◽  
pp. 105025
Author(s):  
Ben J.O. Robinson ◽  
David K.A. Barnes ◽  
Simon A. Morley
Keyword(s):  
Southern Ocean ◽  
Assemblage Structure

Biological response to physical processes in the Indian Ocean sector of the Southern Ocean: a case study in the coastal and oceanic waters

2014 ◽  
Vol 186 (12) ◽  
pp. 8109-8124
Author(s):  
N. Anilkumar ◽  
Racheal Chacko ◽  
P. Sabu ◽  
Honey U. K. Pillai ◽  
Jenson V. George ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Southern Ocean ◽  
Biological Response ◽  
Physical Processes ◽  
Indian Ocean Sector ◽  
The Indian Ocean ◽  
Ocean Sector

scholarly journals Numerical Modelling of Iceberg Towing for Water Supplies—A Case Study

1978 ◽  
Vol 20 (84) ◽  
pp. 533-542 ◽  
Author(s):  
J.G. Job
Keyword(s):  
Numerical Modelling ◽  
Southern Ocean ◽  
Hydrodynamic Model ◽  
Minimum Energy ◽  
Two Dimensional ◽  
Water Supplies ◽  
Antarctic Continent ◽  
Energy Consumptions ◽  
The Antarctic

AbstractsThe towing of unprotected icebergs from the Antarctic continent (66° S.) to latitude 38° S. has been simulated using an explicit hydrodynamic model and an extended two-dimensional melting model. It was found that nominal towing accelerations in excess of 2 × 10-5m s-2were required to deliver ice over this route in most circumstances, and minimum energy consumptions were obtained at accelerations around 10-4m s-2. Unprotected icebergs could be delivered with about 50% yield to latitude 38° S., but the rate of deterioration in the warm waters indicates that protection would be required for longer journeys. The towing simulation was most sensitive to north-south current components, the total towing distance and the rate of iceberg deterioration. Efforts directed towards locating suitable icebergs in the region 50° S. to 60° S., and towards increasing knowledge of the changing current patterns in the Southern Ocean would be most valuable, as would a knowledge of the mechanisms and rates of deterioration of icebergs in warm seas.

Elemental compositions of individual aerosol particles collected over the Southern Ocean: A case study

1997 ◽  
Vol 43 (2) ◽  
pp. 183-195 ◽  
Author(s):  
Hideaki Mouri ◽  
Ippei Nagao ◽  
Kikuo Okada ◽  
Seizi Koga ◽  
Hiroshi Tanaka
Keyword(s):  
Southern Ocean ◽  
Aerosol Particles ◽  
Elemental Compositions

scholarly journals Effectively Extracting Iceberg Freeboard Using Bi-Temporal Landsat-8 Panchromatic Image Shadows

2021 ◽  
Vol 13 (3) ◽  
pp. 430
Author(s):  
Zhenfu Guan ◽  
Xiao Cheng ◽  
Yan Liu ◽  
Teng Li ◽  
Baogang Zhang ◽  
...  
Keyword(s):  
Southern Ocean ◽  
Global Climate ◽  
Elevation Angle ◽  
Freshwater Flux ◽  
Landsat 8 ◽  
Solar Elevation ◽  
Panchromatic Image ◽  
Aerial Vehicle ◽  
Data Gap

The freshwater flux from icebergs into the Southern Ocean plays an important role in the global climate through its impact on the deep-water formation. Large uncertainties exist in the ice volume transported by Southern Ocean icebergs due to the sparse spatial and temporal coverage of observations, especially observations of ice thickness. The iceberg freeboard is a critical geometric parameter for measuring the thickness of an iceberg and then estimating its volume. This study developed a new, highly efficient shadow-height method to precisely measure the freeboard of various icebergs surrounded by sea ice using Landsat-8 Operational Land Imager 15-m bi-temporal panchromatic image shadows at low-solar-elevation angles. We evaluated and validated shadow length precision according to bi-temporal measurements and comparison with the measurements from the unmanned aerial vehicle. We determined freeboard precision according to shadow length precision and solar elevation angle. In our case study area, 4832 available freeboard measuring points with shadow length precision better than 2 pixels covered 376 icebergs with sizes ranging from 0.002 to 0.7 km² and with freeboard ranging from 2.3 to 83.4 m. At the solar elevation angles of 5.2°, the freeboard precision of 64.1% data could reach 1 m and 86.9% could reach 2 m. Our proposed method effectively filled in the data gap of existing freeboard measurement methods.

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