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Showing 1 to 20 of 528 for “"Antarctic"”.
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Antarctic Protected Areas
The system of protected sites established for Antarctic terrestrial environments by the Antarctic Treaty is examined - protection of sites is one of the measures available to Contracting Parties to the Treaty for the preservation and conservation of the Antarctic Environment. Protected sites are …
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Perspectives on Antarctic conservation: an analysis of New Zealand Antarctic stakeholder views
The Antarctic, open to all and under no state ownership, is one of the world’s global commons. This area is facing challenges that extend beyond its boundaries. Challenges stemming from global warming, economic utilisation of natural resources, increased human visitation and growing science-related …
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Antarctic Alteration of Meteorites
… of large accumulations of meteorites in Antarctica is comparably recent, with annual collection expeditions beginning in 1974. Since then, over 50,000 meteorites have been recovered from the icefields of Antarctica. Many of those meteorites have had long residence times of up to 2 Ma …
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Antarctic climate: ocean fluxes and variability
… and the balance of fluxes around the<br/>Antarctic Circumpolar current.<br/><br/>A historical data set in the region of Drake Passage is examined to study the large-scale<br/>water mass variability between 1926-2005. The water mass properties of the Lower<br/>Circumpolar Deep Water is …
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Reproductive success in Antarctic marine invertebrates
The nearshore Antarctic marine environment is unique, characterised by low but constant temperatures that contrast with an intense peak in productivity. As a result of this stenothermal environment, energy input has a profound ecological effect. These conditions have developed over several millions …
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Remote Sensing of Antarctic Penguin Populations
… by the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR), the responsible international agency for conserving Antarctic marine life. However, despite the intrinsic role that the species play, there is a dearth of knowledge about even basic demographic and …
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Antarctic tabular icebergs in ocean waves
… a detailed account of our existing knowledge of Antarctic tabular icebergs and their development. Data from in situ field experiments and automatic stations placed on the surface of icebergs are presented and analysed. The data comprise information on the sea state, iceberg geometry, structure …
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Wilderness visitor managment and Antarctic tourism
… of tourists who are visiting wilderness areas in Antarctica. Previous research has addressed Antarctic tourism largely as a policy issue. This research looks at Antarctic tourism in the context of the debate on wilderness and focuses on the implications for tourism and on the thinking about …
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Wilderness And Aesthetic Values In The Antarctic
… 1991 Protocol on Environmental Protection to the Antarctic Treaty requires parties: 'to identify within a systematic environmental-geographical framework ... areas of outstanding aesthetic and wilderness value' (Annex V, article 3.2). In order to develop these frameworks, procedures and techniques …
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Monitoring the Antarctic Ice Sheet From Space
The Antarctic ice sheet is a geophysically - and in an age of growing concern about global warming, geopolitically - important portion of Earth. The composition and dynamics of the Antarctic ice sheet influence global climate patterns, global sea level and the planet's radiation budget. Recent …
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Behavioral freeze avoidance in an Antarctic fish
Freeze avoidance is vital for the survival of Antarctic notothenioid fishes inhabiting the ice-laden waters of the high-latitude Southern Ocean. Most notothenioids avoid freezing primarily by the action of their blood-borne antifreeze glycoproteins (AFGPs). AFGPs arrest the growth of environmental …
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The Design and Servicability of Antarctic Stations
Stations in Antarctica must fulfil the basic aims of providing protection from the harsh climate and a safe and comfortable environment for staff. Faur stations have been selected, from the 39 operating during the winter of 1986, and analysed for the way they match the various constraints to …
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The Evolutionary History of the Antarctic Flora
How long has the extant flora been present in the Antarctic? Glaciological reconstructions propose that most areas in Antarctica were covered by thick ice sheets throughout the Last Glacial Maximum (LGM; ~22-18 kya) as well as previous glaciations, suggesting terrestrial life must have been …
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Hydrochemical dynamics on sub-Antarctic Marion Island
Although sub-Antarctic maritime environments are some of the most sensitive regions to climate change, investigations into isotopic and hydrochemical dynamics on sub-Antarctic islands are limited. To address this, the Soft Plume River on sub-Antarctic Marion Island was sampled daily along an …
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Modeling diffusion in the Antarctic circumpolar current
In order to understand the role of eddies in lateral mixing in a rotating fluid, a small scale laboratory model is constructed. An experiment is carried out in a rotating, differentially heated annulus and the evolution of a dye tracer mixed by turbulent motions is studied. Images are analyzed to …
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Seasonal and Mesoscale Variability in the Distribution of Antarctic Krill, <i>Euphausia superba</i>, West of the Antarctic Peninsula
… variability in the distribution and abundance of Antarctic krill, Euphausia superba, within continental shelf waters west of the Antarctic Peninsula and to investigate possible relationships between variability in krill distributions and variability in selected environmental parameters. Acoustic …
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Morphological approaches to understanding Antarctic Sea ice thickness
Sea ice thickness has long been an under-measured quantity, even in the satellite era. The snow surface elevation, which is far easier to measure, cannot be directly converted into sea ice thickness estimates without knowledge or assumption of what proportion of the snow surface consists of snow …
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The flow and fracture of Antarctic Ice Shelves
… like variations in stress. Here, we focus on Antarctic ice shelves, the fast-flowing extensions of the ice sheet that impart stabilizing resistive stresses onto the grounded area. Processes contributing to dynamic change through melting, calving, the flow and fracture ice, can be explored and …
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