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On sub-Antarctic Macquarie Island, we examined pup weaning mass of southern elephant seals in relation to human presence. Pup weaning mass was previously found to be positively associated with 1st-year survivorship. Weaned pups were weighed in a remote area, Middle Beach…
An experiment was conducted on an autoline longline vessel to derive a sink rate, and line weighting regime, that would minimise the capture of albatrosses based on knowledge of line sink rates and albatross diving abilities. Sink rates of lines deployed into propeller turbulence…
The foraging behaviour of Adélie penguins Pygoscelis adeliae was studied simultaneously at Shirley Island (SI, 110° E) and at Petrel Island (PI, 140° E) in approximate conjunction with the ship-based krill survey conducted on board the RSV Aurora Australis.
Laboratory ice deformation experiments are described that use an apparatus designed to apply a simple shear stress configuration. Ice samples are deformed by the application of horizontal parallel forces, with no vertical forces imposed…
The Lambert Glacier–Amery Ice Shelf system is a major component of the East Antarctic ice sheet. This paper presents two Digital Elevation Models (DEMs) that have been generated for the Lambert Glacier - Amery Ice Shelf system from validated ERS-1 satellite radar altimeter waveform data.
Middle-atmosphere gravity wave spectra of energy against vertical wavenumber are usually assumed to have a log-log slope of -3, based on a number of studies over many years and geographical locations, as well as from theoretical work.
High-resolution Fabry-Perot spectrometer observations of the OH(62) Q1(1) line, l834.46 nm, were made at Mawson, 67.6ºS 62.9ºE, and Davis, 68.6ºS 78.0ºE, Antarctica, in 1997. The observing program resulted in three sets of continuous OH observations suitable for tidal analysis: July 25…
The so-called ionosonde drift technique of determining ionospheric velocities from angle-of-arrival and Doppler shift measurements is now well established. In the standard digital ionosonde technique, commonly called the drift mode…
A UMLCAR ( University of Massachusetts Lowell, Centre for Atmospheric Research) Digital Ionosonde (DPS-4) has operated at the Australian Antarctic polar cap station Casey (80.8oS geomagnetic latitude) since early 1993, primarily to study the dynamics of the southern polar cap ionosphere.
Muon observations are complementary to neutron monitor … observations but there are some important differences in the two techniques. Unlike neutron monitors, muon telescope systems use coincidence techniques to obtain directional information about the arriving particle.
Muon observations are complementary to neutron monitor observations but there are some important differences in the two … techniques. Unlike neutron monitors, muon telescope systems use coincidence techniques to obtain directional information about the arriving particle.
Ground-based Fabry-Perot spectrometer observations from the Australian Antarctic stations of Davis and Mawson show an upward wind ~100 m s-1 in the thermosphere at ~240 km altitude on the night of Day of Year 159 in 1997.
The thermopheric oxygen l630 nm emission has been observed using high-resolution Fabry-Perot spectrometers at Mawson (67.6°S, 62.9°E) and Davis (68.6°S, 78.0°E), Antarctica. A new technique, combining the results from the two instruments, is used to derive vector wind fields.
A popular hypothesis established in the 1980s proposed that the decline in whale populations in the Southern Ocean due to exploitation in the early to middle 20th century resulted in a ‘krill surplus’. It was proposed that other krill predators were released from a food-limited state…
The Diego Ramirez Islands lie 60 nautical miles … southwest of Cape Horn and are the breeding site for … three species of burrowing seabirds: blue petrels … (Halobaena caerulea), common diving petrels (Pelecanoides … urinatrix) and sooty shearwater (Puffinus griseus).
The Southern Ocean south of Australia is oceanographically complex, being characterized by double branches of the … Sub-Antarctic Front (SAF), Polar Front (PF) and Southern Antarctic Circumpolar Current (SACCF), in addition to the … Southern Boundary (SB) of the ACC.
Ideally, evidence from long-duration spaceflight should be used to predict likely occurrences of behavioral health events and for planning management strategies for such events. With small numbers of space travelers, and limited … long-duration missions of a year or more…
Repeat hydrographic sections across the Antarctic Circumpolar Current (ACC) in Drake Passage are used to derive an empirical relationship between upper ocean … temperature and the baroclinic transport stream function.
A 7 year time series of austral summer expendable bathythermograph (XBT) sections between Tasmania and Antarctica is used to describe the subsurface structure of Southern Ocean interannual temperature anomalies. Comparison of the discontinuous XBT record with a continuous (weekly average)…