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For Emperor penguins (Aptenodytes forsteri), huddling is the key to survival during the Antarctic winter. Penguins in a … huddle are packed so tightly that individual movements become impossible, reminiscent of a jamming transition in … compacted colloids. It is crucial, however…
Effects of ocean acidification in conjunction with temperature change warrants investigation as little is known about potential interactive effects of these parameters on Antarctic benthic species.
The determination of the conservation status for a species at risk of extinction is based … largely upon consistent change in the population size. In long-lived species, such as seabirds…
The snow cover on sea ice is an integral component of the sea ice environment. It … accumulates throughout the year and has a significant impact on the surface energy … balance due to its high albedo and insulative properties.
Ice core records from Antarctic and Greenland have revealed that the last deglaciation (ca. 19, 000 to 11, 000 years before present) was accompanied by an 80 ppmv increase in atmospheric CO2 and a sequence of large, hemispheric climate variations.
The total ozone column (TOC) in the 'collar' region outside the Antarctic Ozone Hole exhibits a pronounced wave-1 zonal pattern in austral spring. During the period 1979-2005, the zonal minimum of the pattern exhibited a general eastward shift of approximately 45 degrees of longitude…
Flexibility in foraging behaviour and diet are characteristics of many penguin species. While these 2 aspects of foraging ecology are presumably tightly coupled, the connection between … them is rarely examined directly.
The 33.2 MHz interferometric meteor radars located at Davis Station, Antarctica and Darwin, Australia typically detect around 15 000 specular underdense meteor echoes every day.
Fidelity and projected changes in the climate models, used for the Intergovernmental Panel on Climate … Change (IPCC) Fourth Assessment Report (AR4), are assessed with regard to the Southern Hemisphere … extratropical ocean and sea ice systems.
Prediction of the impact of global climate change on marine phytoplankton is fraught with uncertainties. Increasing temperature, enhanced surface stratification, alteration of ocean currents, intensification or weakening of local nutrient upwelling, stimulation of photosynthesis by elevated CO2…
The Amery Ice Shelf, East Antarctica, undergoes high basal melt rates near the southern … limit of its grounding line where 80% of the ice melts within 240km of becoming afloat. A considerable … portion of this later refreezes downstream as marine ice.
Techniques are presented for generating thermal infrared and … visible composite images from cloud-free portions of MODIS … (MODerate resolution Imaging Spectroradiometer) images … closely spaced in time, with a focus on studies of landfast sea … ice along the East Antarctic coast.
This paper presents details of techniques for generating … thermal infrared and visible composite images from the … cloud-free portions of temporally closely spaced MODerate resolution … Imaging Spectroradiometer (MODIS) images…
We attached satellite tags to 16 humpback whales off South Eastern Australia in October/November 2008. The tags transmitted for an average of 55 days (range: 3-156 days) and provided data on migratory movements between Australia and the Antarctic feeding grounds.
This short paper describes 3 consistent regional differences in fin whale vocalizations recorded in the Southern … Ocean. Long term recordings were analysed from locations in eastern and western Australia, and locations south of … these in the Antarctic.
Transition mechanisms characterizing changes fromhurricanes tomidlatitude cyclones … and vice-versa (extratropical and tropical transition) have become a topic of increasing … interest…
The association between Southern Hemisphere cyclones and anticyclones and the El Niño–Southern … Oscillation (ENSO), southern annular mode (SAM), Antarctic sea ice extent (SIE), and rainfall in Perth … and Melbourne is explored. Those cities are, respectively…
PILOT (the Pathfinder for an International Large Optical Telescope) is a proposed 2.5-m optical/ … infrared telescope to be located at Dome C on the Antarctic plateau. Conditions at Dome C are known to … be exceptional for astronomy. The seeing (above ¡30m height), coherence time…
A local scale, time dependent three-dimensional … model of the neutral thermosphere was used to test the applicability … of two previously published empirical relations between … thermospheric vertical wind and velocity divergence, i.e., those due to Burnside et al. (1981) and Brekke (1997).
A study to assess the potential exposure to solar UV radiation of … expeditioners on Australian Antarctic resupply voyages was … carried out over the Austral summers of 2004 ⁄ 2005 to … 2006 ⁄ 2007. Subjects wore UVR-sensitive polysulphone (PS)…
We conducted a scanning electron microscopic survey of morphological variations in the … calcareous nanoplankton species Emiliania huxleyi in Southern Ocean surface water samples … collected along a transect from 43 to 64° S and 141 to 145° E during November 2001, October to … February 2002/2003…
We present measurements and analysis of the isotopic composition (ä15Nbulk, ä15Ná, ä15Nâ, and ä18O) of nitrous oxide in 50 samples of tropospheric air collected at Cape Grim, Tasmania between 1978 and 2005 and in 11 samples of firn air from Law Dome, Antarctica…
When resources are limited or patchy, a species may develop some degree of resource … partitioning to reduce intra-specific competition. Development of intra-specific resource partitioning … is more pronounced in species with clear phenotypic variation among individuals (e.g. age or sex).
The use of sophisticated telemetry logging devices has revealed that short-finned pilot whales employ … energetic sprints to chase down their deep-dwelling prey. These sprints are costly in terms of energy, and therefore oxygen…
1. In terrestrially breeding phocid seals males are significantly larger than females with their large … size conferring advantage in male–male competition, and increasing their ability to fast during the … breeding season, prolonging tenure and hence mating opportunities. 2.