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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…
The natural variability of the Weddell Sea variety of Antarctic Bottom Water (AABW) is examined in … a long-term integration of a coupled climate model. Examination of passive tracer concentrations suggests … that the model AABW is predominantly sourced in the Weddell Sea.
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.
The Census for Antarctic Marine Life (CAML, IPY Project 53) will investigate the … distribution and abundance of Antarctic marine biodiversity and how it will be affected … by climate change.
A description of the early days of infrared site testing at … the South Pole is given, with special attention paid to the data which … quantified the conditions during summer and the long twilight period. Such times are also provide relatively benign conditions for humans … in Antarctica as well.
Knowledge of penguin abundance at regional and circumpolar scales across the Southern Ocean is important … for the development of ecosystem models and to estimate prey consumption by penguins to assess potential competition … with fisheries’ operations.
Living in a frozen desert, Antarctic mosses are characterised by the ability to survive desiccation and can tolerate multiple desiccation-rehydration events over the summer growing season. As a result of recent ozone depletion…
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)…
Macquarie Island, a small subantarctic island, is home to rockhopper, royal and king penguins, which are often infested with the globally distributed seabird tick, Ixodes uriae. A flavivirus, an orbivirus, a phlebovirus, and a nairovirus were isolated from these ticks and partial sequences obtained.
Interactions between short-beaked common dolphins Delphinus delphis and the … fishing industry of South Australia (SA) have lead to serious concerns over the … long-term viability of the local dolphin population.
The capacity of the polar flora to adapt is of increasing concern given current and predicted … environmental change in these regions. Previous genetic studies of Antarctic mosses have been of limited … value due to a lack of variation in the markers or non-specificity of the methods used.
Summary … 1. Previous studies of Antarctic clonal moss populations using RAPD markers have reported … extraordinarily high levels of genetic variation. This has been claimed to reflect somatic mutation, possibly resulting from elevated UV-B radiation. 2.
Potential Adélie penguin breeding habitat (defined as ice-free land with area >4000 m2 and within 500 m of the ocean) in the Australian Antarctic Territory (AAT) was mapped using a GIS…
Between January and April over six consecutive years (2000 to 2005) photographs of the … dorsal fin and lateral bodies of pygmy blue whales (Balaenoptera musculus brevicauda) were … collected at the Perth Canyon, Western Australia.
Law Dome, in coastal East Antarctica, is a relatively low-latitude site (6646S) with a strong maritime … climate, dominated by cyclonic precipitation which produces high snow accumulation rates and very … well-resolved ice core records.
Ice cores from Law Dome, in coastal East Antarctica, provide climate records that have strong connections to … the Southern Ocean and mid-latitude climate in the … Australian region. The overall climate history available from … Law Dome extends back for tens of millennia…
A field trial for removal of dissolved metal contaminants in water from an abandoned waste disposal site, using ion-exchange … columns of an iminodiacetic acid chelating ion-exchange (IDA) resin, was conducted at Casey Station, Antarctica. An on-site … monitoring technique…
Length-at-age data for Patagonian toothfi sh (Dissostichus eleginoides) at Heard Island … (Division 58.5.2) were fi tted using a von Bertalanffy (VB) growth model taking into … account response-biased sampling of fi sh that were aged. Subsampling of random lengthfrequency … (LF)…
Signals used in mate attraction are predicted to be highly condition dependent, and thus should be … sensitive to environmental contributions to condition. However, the effects of temporal fluctuations in the … environment on sexual selection in long-lived animals have been largely ignored.
1. Previous studies of Antarctic clonal moss populations using RAPD markers have reported … extraordinarily high levels of genetic variation. This has been claimed to reflect somatic mutation, possibly resulting from elevated UV-B radiation. 2.
The event that occurred approximately 8200 years ago is the largest excursion in climate since the beginning of the Holocene. In this event we observe the climatic response to a perturbation which provides a probe with which to investigate the stability of interglacial climate.
[1] The relationship between the production of dimethylsulfide (DMS) in the upper … ocean and atmospheric sulfate aerosols has been confirmed through local shipboard … measurements, and global modeling studies alike.
Although satellite passive-microwave remote sensing is the main source of global sea-ice … information, the data products have never been adequately validated for East Antarctic … conditions.