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Responses by marine top predators to environmental variability … have previously been almost impossible to observe directly. By … using animal-mounted instruments simultaneously recording … movements, diving behavior, and in situ oceanographic properties…
1. Estimates of penguin abundance are important for developing marine ecosystem models and … assessing potential competition between penguins and fisheries operations. 2. Most shipboard surveys of penguins use strip transect (ST) or conventional distance sampling … (CDS)…
Remote acoustic moorings can be used to investigate baleen whales at vastly different temporal and spatial scales. On one end of the spectrum…
We describe the circulation and seasonal development of the upper ocean … in the Seasonal Ice Zone (SIZ) of the Southern Ocean along 140°E. The 140°E section … was repeated four times between November 2001 and March 2002, spanning the period … from early spring to autumn.
[1] In September–October 2005, the juxtaposition of low- and high-pressure anomalies at … 130W and 60W, respectively, created strong and persistent northerly airflow across the … West Antarctic Peninsula (WAP). This had a major impact on regional sea ice conditions…
Fast ice makes up about 10 % by area (or 14 - 20 % by volume) of the total … Antarctic pack. Its growth is largely determined by thermodynamics processes, which makes it a valuable tool to monitor changes in the polar climate system. Time series of fast-ice properties…
Understanding and characterising the variability of ozone in the lower atmosphere is a key aspect of … regional and global climate assessment. Tropospheric ozone influences climate by absorbing outgoing … longwave terrestrial radiation, thereby acting as a greenhouse gas…
Antarctic fast ice is of key climatic and ecological importance, yet its distribution and variability are poorly understood (compared to pack ice). In this joint Australian-French study…
Information of sea-ice drift is crucial to understand the East Antarctic climate system, and knowledge of sea-ice dynamics is needed to fully explore the effects of cryospheric changes on the ecosystems within the Antarctic pack-ice zone. Satellite-derived sea-ice data cover the Southern Ocean.
We describe a large-angle survey for fast, optical transients: gamma ray bursts (GRBs), supernovae (SNe), lensed and … transiting planets, AGNs and serendipitously found objects.
Recent data have shown that Dome C, on the Antarctic plateau, is an exceptional site for astronomy, with atmospheric conditions superior to those at any existing mid-latitude site. Dome C, however, may not be the best site on the Antarctic plateau for every kind of astronomy.
A study of the variation in snow cover and depth over the Antarctic sea ice zone was … performed using AMSR-E/Aqua snow depth and sea ice temperature products of … approximate 5-day intervals from June 2002 through December 2005. Time series statistic … analyses of mean and maximum snow depth…
I will review current efforts to model the Antarctic ice pack. Sea ice models in GCMs have … become more sophisticated in recent years; state-of-the-art models now include viscousplastic … dynamics, second-order-accurate advection, multilayer thermodynamics…
Sea ice freeboard distributions are detennined from ICESat measurements of mean surface … elevations with a range precision of -2 cm over 70 m footprints spaced by 170 m along … track. Freeboard (snow cover plus sea ice) distributions are constructed from elevation … measurements within :i:
Ship-based observations of sea ice conditions have been collated from 89 voyages to the … Antarctic pack ice, between 1980 and 2005. These data were collected primarily by … Russian, Australia, US…
Long term acoustic records of underwater sound can be used to assess the timing of migrations, peak periods of … relative abundance, and seasonality and overlap of different species’ presence over large spatial scales.
In this study, we measure the silicon-isotopic composition d29Si,%, relative to NBS28 … quartz standard) of dissolved silicon and biogenic silica collected by sequential melting … from spring Antarctic pack ice collected near 117E-64.5S.
Electromagnetic ion cyclotron (EMIC) waves are generated in the equatorial … region of the plasmasphere-magnetospherbey internal wave-particle interaction … with ring current ions. In ground observations they are observed as Pc 1-2 (0.1-5 … Hz) waves…
We use line transect detection functions together with generalized linear and additive … models to estimate detection probability when detection on the line ("g(O)") may … not be certain.
Sea-ice velocities derived from remotely sensed microwave imagery of the Special Sensor … Microwave/Imager (SSM/I) have been analyzed for changes over time in Antarctic sea-ice velocity, for … the period 1988–2004.
Short-tailed shearwaters Puffinus tenuirostris (STSH) make use of a number of physical … oceanographic features on their foraging trips to the Southern Ocean from their breeding colonies in … southeast Australia.
The distribution and abundance of phytoplankton communities off east Antarctica were surveyed using CHEMTAX analysis of HPLC pigment profiles, supplemented by microscopy. Eight north--south transects … were surveyed between 80°E and 150°E, from approximately 63°S to the sea-ice, during Jan.--Mar.