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We report the first observations of E region neutral wind fields and their interaction … with auroral arcs at mesoscale spatial resolution during geomagnetically quiet conditions at … Mawson, Antarctica. This was achieved by using a scanning Doppler imager…
Special emphasis should be placed on determining optimal sampling regimes to detect … statistically significant differences in key indicators between populations for species with high conservation … values, especially when invasive handling techniques are the only method of gathering … data.
It has recently been shown that sea ice (via frost flowers) is an important source of sea … salt to coastal Antarctica. This has been used to suggest that the sea salt record from … ice cores may reflect a proxy for sea ice extent around Antarctica. In this study…
As revealed by the CALIPSO orbiting lidar, the intense firestorms that occurred … in southern Australia during February 2009 injected a significant plume of … smoke particles into the lower stratosphere. Over the following weeks…
The 15-year set of radar observations of Mesosphere and Lower Thermosphere (MLT) winds obtained from Davis station in Antarctica (69S, 78E) provide an opportunity for studies of interhemispheric coupling. Observations and modelling described by Becker and Fritts [2006]…
During austral spring 2003, mesoscale sea ice drift and deformation off East … Antarctica were investigated using in situ data from a nine-buoy array. Upon deployment, the array comprised an area of about 4000 km2 with a mean ice concentration of 96%.
Regular measurements of the atmospheric electric field made at Vostok Station (φ=78.451S; … ë=106.871E, elevation 3500 m) in Antarctica demonstrate that extremely intense electric fields … (1000–5000 V/m) can be observed during snow storms.
This study was the first to use high-resolution IKONOS imagery to classify vegetation communities on … sub-Antarctic Heard Island. We focused on the use of texture measures, in addition to standard … multispectral information, to improve the classification of sub-Antarctic vegetation communities.
The Network for the Detection of Mesopause Change (NDMC) is a global program with the mission to promote international cooperation among research groups investigating the mesopause region (80-100km) with the goal of early identification of changing climate signals. From September 01 to October 31…
The Network for the Detection of Mesopause Change (NDMC) is a global program with the mission to promote international cooperation among research groups investigating the mesopause region (80-100 km) with the goal of early identification of changing climate signals.
Spatial and temporal environmental variation in terrestrial Antarctic ecosystems are known to impact … species strongly at a local scale, but the ways in which organisms respond (e.g. physiologically, behaviourally) to such variation are poorly understood. Further…
Two major astronomical experiments are underway at the US Amundsen-Scott South … Pole Station. The first is the South Pole Telescope, a 10m sub-millimetre telescope de- … signed to measure primary and secondary anisotropies in the CMBR…
Site testing data provides an essential part of the justi¯cation … for funding any new astronomical facility by de¯ning the technological … design and determining the telescope performance, thus allowing the … scienti¯c objectives to be prioritised.
Snodar is a 5 kHz monostatic acoustic radar designed to measure the atmospheric turbulence within the first 200 m of the … atmosphere with a vertical resolution of 1 m. An in situ calibration target is used to give absolute intensity calibration.
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. The atmospheric conditions at Dome C … deliver a high sensitivity, high photometric precision, wide-field, high spatial resolution…
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. The atmospheric conditions at Dome C … deliver a high sensitivity, high photometric precision, wide-field, high spatial resolution…
Polar stratospheric gravity wave activity is studied using data from the Constellation … Observing System for Meteorology, Ionosphere and Climate (COSMIC) Global … Positioning System Radio Occultation (GPS-RO). Waves with vertical wavelengths of … 2 to 15 km are considered.
In Polar Regions, sea ice has a marked influence on interactions between the coupled ocean-atmosphere system. The contribution of the sea ice zone to the global flux of dimethylsulphide (DMS), a trace sulphur gas implicated in climate change, has been of interest for over a decade.
We investigate using relative amounts of … prey DNA recovered from pinniped faeces to obtain … diet composition data. Faeces were obtained from … captive sea lions being fed a diet containing three fish … species (50%, 36% and 14% by mass).
Commercial sealers exterminated the original … fur seal population at Macquarie Island in the early 1800s. The Wrst breeding record since the sealing era was not … reported until March 1955. Three species of fur seal now … occur at Macquarie Island, the Antarctic (Arctocephalus … gazella)…
Diet, and in particular, food quality and quantity … can inXuence the reproductive performance of marine … predators. Also, the diet of specialist predators is often … monitored in programmes that model and manage ecosystems. We examined the diet of Adélie penguins (Pygoscelis … adeliae)…
Whale sharks (Rhincodon typus) are thought to aggregate in nearshore waters around Christmas Island … (105◦37E, 10◦29S) to consume the marine larvae of the endemic red land crab (Gecarcoidea natalis). However, there … have been no direct observations of sharks feeding on crab larvae.
Assessments of nutrient-limitation in microalgae … using chl a fluorescence have revealed that nitrogen … and phosphorus depletion can be detected as a … change in chl a fluorescence signal when nutrientstarved … algae are resupplied with the limiting nutrient.
The temporal evolution of the subauroral polarization stream (SAPS) is investigated … using the Doppler velocity observations by the Unwin HF radar in conjunction with … the simultaneously observed auroral luminosity and plasma convection reversal regions. The event under study of 14 December 2004…