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Showing 1 to 20 of 35 for “"Marginal Ice Zone"”.
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Analysis of marginal ice zone noise events
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1991.
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An observational and analytical study of marginal ice zone atmospheric jets
… jets have been observed to occur frequently in marginal ice zones (MIZs), but little research has been done on the dynamics of these features. In the fall of 2015, during the Office of Naval Research Sea State cruise in the Beaufort Sea, the research team used radiosondes and shipboard …
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Atmospheric drivers of ice drift in the Antarctic marginal ice zone
Sea-ice drift in the Antarctic marginal ice zone (MIZ) was investigated using an array of five drifting ice buoys, deployed during the winter sea-ice expansion, in July 2017. An initial 15- day analysis of pancake ice drift is presented, using the cluster of buoys, which shows: (1) exceptionally …
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Computational modelling of ice floe dynamics in the Antarctic marginal ice zone.
The contribution of Antarctic sea ice in global climate models requires a more accurately estimation, as a relatively large part, approximately 4% of the Earth's surface in the winter season, is covered by sea ice. Understanding the dynamic and thermodynamic processes of sea ice, results in a …
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Permeability of winter and spring first-year ice in the Antarctic marginal ice zone
… Winter and Spring Cruise of the South African icebreaker SA Agulhas II. First-year spring and winter sea ice were sampled from the Antarctic marginal ice zone. Consolidated pack ice was collected during both cruises, while pancake ice floes and brash ice floes were collected during Winter and …
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Assessment of the synoptic variability of the Antarctic marginal ice zone with in Situ observations
Knowledge of sea ice variability, which contributes to the detection of climate change trends, stems primarily from remote sensing information. However, sea ice in the Southern Ocean is characterised by large variability that remains unresolved and limits our confidence on the remotely sensed …
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The variability of the marine atmospheric boundary layer in the Greenland Sea marginal ice zone a case study.
… layer in the East Greenland Sea Fram Strait marginal ice zone (MIZ) is examined for various wind flow regimes with respect to the ice edge. Rawinsonde profiles and surface observations collected from three ships during MIZEX-87 (20 March - 11 April 1987) served as the data set for the …
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Physical and biogeochemical properties of seasonal sea ice in the Atlantic sector of the Antarctic marginal ice zone
The study of Antarctic sea ice biogeochemistry has largely focused on samples collected from pack ice during summer, with few winter data available. Measurements from the Antarctic marginal ice zone (AMIZ) have proven even more difficult to obtain. The AMIZ is a broad, circumpolar feature of the …
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Spatial variability of the ambient noise field associated with the Marginal Ice Zone and its relationship to environmental parameters
… Laboratory (NRL) in the East Greenland Sea Marginal Ice Zone (MIZ) . Ambient noise "hot spots" or concentrated areas of relatively high noise levels were found along the ice edge using a towed array. Ambient noise levels were obtained on 27 and 28 July using AN/SSQ-57A and AN/SSQ-57XN5 …
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Little Buoys, Big Ocean: Observations of Wave-Driven Transport of Buoyant Objects in the Nearshore and Marginal Ice Zone
… on the ocean surface, including plastics, sea ice, search and rescue targets, oil, and marine organisms. Accurately predicting their trajectories is essentialfor both scientific and operational applications. The processes that drive the transport of these objects, particularly on shorter time …
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The Marginal Ice Zone (MIZ) seawater property dynamics of the Southern Ocean below Southern Africa using animal-borne observations
The Marginal Ice Zone (MIZ) in the Southern Ocean is a dynamic area shown to vary seasonally in width and extent northward. Remote sensing is the only tool available to give a large-scale picture of sea-ice conditions but it is important to note that only surface properties are visible in remote …
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Investigation of the Interactions Between Sea Ice Algae from the Marginal Ice Zone of Antarctica and Artificial Sea Ice
Sea ice is multi-phase system that plays a major role in the Earth's climate system. Sea ice algae act as primary producers of organic carbon, forming the building blocks
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SHARC Buoy: Robust firmware design for a novel, low-cost autonomous platform for the Antarctic Marginal Ice Zone in the Southern Ocean
Sea ice in the Antarctic Marginal Ice Zone (MIZ) plays a pivotal role in regulating heat and energy exchange between oceanic and atmospheric systems, which drive global climate. Current understanding of Southern Ocean sea ice dynamics is poor with temporal and spatial gaps in critical seasonal …
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A Small-Scale Model of Sea Ice Dynamics in the Antarctic Marginal Ice Zone Using Fluid-Structure Interaction and the Reference Map Technique
Sea ice covers approximately 10% of the Earth's surface and modulates the sea-air heat and momentum exchange, therefore playing a major role in the global climate. The Antarctic marginal ice zone (MIZ) is the seasonally varying region between the open Southern Ocean and the Antarctic pack ice. It …
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Computational approaches for sub-meter ocean color remote sensing
… applications (e.g., mapping algal biomass in the marginal ice zone). While many aspects of the satellite ocean color remote sensing paradigm are applicable to sub-meter scales, steps within the paradigm must be adapted to the optical character of the ocean at these scales and the opto-electronics …
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Antarctic sea ice phytoplankton growth rates and survival mechanisms
… phytoplankton survive at the bottom of sea ice where there is very little irradiance for up to 6 months. Sea ice phytoplankton are understudied. This is mainly because in situ studies on sea ice are not only expensive but logistically difficult. Some researchers have elected to bring sea ice …
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Nitrogen uptake and phytoplankton productivity in the changing Barents Sea
… decades, with a significant reduction<br/>in sea ice extent and duration as a result. These sea ice changes and the resultant<br/>changes in ocean mixing are affecting nutrient supply, uptake and cycling and will<br/>have large-scale consequences for the distribution and magnitude of primary …
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Radar Altimetric Studies of Polar Ice
… provide valuable information regarding snow and ice surfaces in the polar regions, where darkness and cloud cover prevail. Here, data collected in the Arctic by a Ku-band microwave radar altimeter, designed and constructed in the UK, are analysed. The two main components of this study comprise …
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UCT SHARC Buoy V3.0: Waves-in-ice measurement in the Antarctic MIZ
The Antarctic Marginal Ice Zone is an area of key scientific interest as the climatic processes in the region affect the global climate. Sea ice in particular has been difficult to model due to its high variability, as a result there is a pressing need to collect in situ data to further develop and …
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Developing the next generation of Autonomous Underwater Gliders
… regions of scientific interest, such as the marginal ice zone (MIZ) and continental shelf breaks present significant challenges to conventional AUG operations due to a combination of changing ocean currents and depths. AUGs are traditionally optimized for performance in shallow (less than …
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