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We applied a multivariate statistical modelling technique called boosted regression trees to derive relationships between environmental conditions and the distribution of the adult stage of the cyclopoid copepod Oithona similis in the Southern Ocean.
Euphausiids are vital components of many oceanic foodwebs. Due to their large size, they are key prey … species for many vertebrates, and several species are subject to commercial fisheries. The best studied … euphausiid species is Antarctic krill (Euphausia superba)…
In January 2005, members of a Chinese expedition team … were the first humans to visit Dome A on the Antarctic plateau, a site … predicted to be one of the very best astronomical sites on earth. In 2006, the Chinese Center for Antarctic Astronomy (CCAA)…
The THz spectral region includes a number of important … transitions which allow us to trace the evolution of the interstellar … medium. Because of the opacity of the atmosphere in this spectral … range, the best sites for ground-based THz observations are on the … Antarctic Plateau; of these sites…
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…
We have characterised a small, high-efficiency diesel generator selected to power remote experiments on the Antarctic … plateau at altitudes of up to 5000 m.
A climatological mean distribution for the surface water pCO2 over the global oceans in non-El Niño conditions has been constructed with spatial resolution of 4° (latitude) ×5° (longitude)…
Temperature data from the COSMIC GPS-RO … satellite constellation are used to study the distribution and … variability of planetary wave activity in the low to midstratosphere … (15–40 km) of the Arctic and Antarctic from … September 2006 until March 2009.
Improved sampling technologies, international observing networks, and data synthesis efforts are providing an unprecedented view of the global patterns and decadal variability of surface-ocean partial pressure of carbon dioxide (pCO2) and air–sea CO2 flux.
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…
Mid-latitude Digisonde Doppler velocities, auroral electrojet (AE) indices and cloud-to-ground (CG) lightning strokes during August 2003–2004 were used to study the perturbations in the F-region … vertical drift associated with terrestrial thunderstorms. A superposed epoch analysis (SEA)…
Measurements of the microwave backscatter coefficient in the ku-band have been obtained over the Antarctic snow cover by the NSCAT wind scatterometer instrument on the ADEOS satellite from August 1996 to June 1997. The instrument has six antennas arranged with two directed forwards…
Microwave backscatter from the Antarctic snow cover depends on the surface roughness, properties and structure within the snow cover, and moisture content. Small increases in moisture content produce a significant reduction in backscatter.
Terrain analysis of vegetation distribution and satellite image classification generally require training data from numerous field sites. On remote subantarctic islands, where access is difficult and the opportunities for aerial photography are limited by cost and weather conditions…
In our recent study on the population genetic structure of … short-beaked common dolphins Delphinus delphis in southern … Australia (Bilgmann et al., 2008) we unequivocally … showed a high level of genetic differentiation between the … local common dolphin population in South Australia (SA)…
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.
PLATO (PLATeau Observatory) is the third-generation astronomical site-testing laboratory designed by the University … of New South Wales. This facility is operating autonomously to collect both scientific and site-testing data from … Dome A, the highest point on the Antarctic plateau…
We present a statistical analysis of short-range E region echoes observed by the Super … Dual Auroral Radar Network (SuperDARN) HF radars in the evening sector (16–22 … MLT) over 3 years. Significant populations of the high-velocity (350–450 m/s)…
SuperDARN radars are sensitive to the collective … Doppler characteristics of decametre-scale irregularities in … the high latitude ionosphere. The radars routinely observe … a distinct transition from large spectral width (>100ms−1) located at higher latitudes to low spectral width…
The solar wind, magnetosphere, and ionosphere form a vast multi-scale system.
A statistical analysis of short-range E-region echoes observed by the SuperDARN HF radars in … the evening sector (16-22 MLT) over 3 years near the solar cycle peak is presented. Significant … populations of the high-velocity (350-450 m/s)…
A simplified three dimensional, time-dependant model of a small region … of Earth's thermosphere is being developed to investigate dynamical … processes over spatial scales of less than 100 km. Because hydrostatic … equilibrium is not enforced in the model…
We present the Gattini project: a multisite campaign to measure the optical sky properties above the two high altitude … Antarctic astronomical sites of Dome C and Dome A. The Gattini-DomeC project, part of the IRAIT site testing … campaign and ongoing since January 2006…
Background: Prey DNA from diet samples can be used as a dietary marker; yet current methods for prey detection require a … priori diet knowledge and/or are designed ad hoc, limiting their scope. I present a general approach to detect diverse prey … in the feces or gut contents of predators.
Filter fractionated picophytoplankton from … Antarctic coastal waters (summer 2001) represented only … 7–33% of total phytoplankton, even though total stocks … were low (average Chl a = 0.32 g l¡1, range = 0.13– 1.03 g l¡1). Though all cells passed a 2 m Wlter…