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The existence of Polar Mesosphere Summer Echoes (PMSE) in the Southern … Hemisphere (SH) has been confirmed using MST radar, HF radar and a Dynasonde. Studies spanned the geographic latitudes 62.1°S (Machu Picchu), 68.6°S (Davis), 69.0°S (Syowa), and 75.5°S (Halley Bay).
Mesosphere Summer Echoes (MSE) have been observed with 50-MHz VHF … radars at middle (MSE) and polar latitudes (PMSE) in the Northern Hemisphere for … more than 20 years. However measurements in the Southern Hemisphere were in the … past rare and limited to low southern latitudes.
Long-term studies at Bird Island, South … Georgia, show that numbers of wandering, black-browed … and grey-headed albatrosses have been decreasing … since the late 1970s. To determine the status of the total … South Georgia population…
The water quality of a marine embayment (Brown Bay) was monitored during the remediation of an abandoned waste disposal site at … Casey Station, East Antarctica, using a combination of biomonitoring and chemical methods. The Antarctic amphipod Paramoera walkeri…
The Australian Antarctic Data Centre (AADC) plays a key role in managing and providing … access to scientific data collected under the auspices of the Australian Antarctic program. Through its membership of the Joint Committee of Antarctic Data Management (JCADM)…
This study examines the molecular-genetic divergence and evolution of Australian aquatic micro-Crustacea Daphnia … and Daphniopsis. The results indicate that species of Daphniopsis are accommodated within the genus Daphnia. Although their phyletic integrity is no longer supported…
Patterns of fishing ground selection were characterised using STATLANT and CCAMLR … fine-scale data. Among the 15 small-scale management units (SSMUs) within Subareas … 48.1, 48.2 and 48.3, including the pelagic SSMUs, only one-third were identified as major … contributors to the total catch.
Reliable estimates of diets are vital to monitor impacts of sea lion populations … on their ecosystems and their interactions with fisheries, and to … understand the role of food to animal nutrition and health. Approaches … include using (1) prey remnants in stomach contents, spews and scats; … (2)…
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).
In 1999 the Glaciology Program of the Australian Antarctic Division initiated a 5-year study of … glaciological investigations into the interaction between the Amery Ice Shelf and the underlying … ocean. The principle objectives of this project are:
Abstract : Well sorted, fine lithic sandstone within the Drygalski Formation at Cape Lockyer on the … southern tip of Heard Island, preserves a diverse terrestrial palynoflora as well as marine diatoms and a few … foraminifera. A combination of these elements suggests a Late Miocene age (10–5 Ma).
The degree to which Southern Hemisphere climatic changes during the end of the last … glacial period and early Holocene (30-8 ka) were influenced or initiated by events occurring in the high … latitudes of the Northern Hemisphere is a complex issue.
The frequency of visibly phage-infected bacterial … cells (FVIB) and the average number of phages … per cell [i.e. burst size (BS)] were determined in … Antarctic and Arctic ultra-oligotrophic freshwater … environments.
This work has been the first application of DGT samplers for measuring metals in water and sediment porewater in the Antarctic … environment, and whilst DGT water sampling was restricted to quantification of Cd, Fe and Ni…
Antarctic snowfall exhibits substantial variability over a range of time scales, with consequent … impacts on global sea level and the mass balance of the ice sheets. To assess how snowfall has … affected the thickness of the ice sheets in Antarctica and to provide an extended perspective…
Two vascular plant species (hair grass Deschampsia antarctica … and herb Acaena magellanica) from sub-Antarctic Heard Island … were sampled on 5 days between December 2003 and February … 2004.
Selenium is an essential micronutrient but its role in oceanic biology is relatively unknown. Whilst this essentiality has been shown in laboratory work for some marine phytoplankton … species, the concentration, chemical species and incorporation methods are unknown.
Twenty one XBT sections across the Antarctic Circumpolar Current (ACC) between New … Zealand and Antarctica, collected in the frame of the Italian CLIMA project (1994-2006), are … used to study the upper ocean thermal structure and to infer the baroclinic transport. The … Subantarctic Front (SAF)…
A sampling strategy to estimate the annual mean CO2 uptake by the Southern Ocean was … developed by applying 2D Fourier transforms and signal-to-noise ratios to the simulated airsea … CO2 fluxes and ∆pCO2 from an ocean biogeochemical model driven with NCEP-R1.
The distribution of carbon dioxide partial pressure (pCO2) in surface seawaters South of … Tasmania has been compared for two very different years; summer 1996/1997 and summer … 2002/3. Field data were obtained in the summer of 2002/3 during cruises onboard the S.S.
Past and recent dissolved iron (dFe) and total dissolvable iron (TDFe) datasets from the Atlantic Meridional Transect (AMT) program are presented.
HPLC-pigment measurements, Production vs Irradiance and daily primary production experiments were carried out on the Kerguelen Plateau during the KEOPS cruise in January and February 2005. The respective contribution of three phytoplankton size classes, namely micro- (> twenty micron)…
The distribution of dissolved (D) and acid-dissolvable (AD) Fe, Ni, Cu and Pb in upper water (0-300 m depth) was determined along a transect in the Australia sector (140E) of the Southern Ocean during three cruises conducted from November 2001 to March 2002.
: We have conducted two hydrographic cruises crossing Deep Western Boundary Current (DWBC) of Antarctic Bottom Water (AABW) in Australia Antarctic Basin and measured chlorofluorocarbons (CFCs). Western region of the basin (around Kerguelen Plateau)…
: P vs E experiments determining photosynthetic parameters and daily primary production were carried out east of Kerguelen Island during the KEOPS cruise in January and February 2005. The Kerguelen Plateau region is naturally enriched with iron, while deeper waters (>1000m) nearby may not be.