Publications matching your search query
Results 26 to 50 of 76
After an unusually (for recent solar cycles) long absence, sunspots of solar cycle 24 started to appear late in 2009. Cosmic ray activity monitored at Earth has an inverse … relationship with the sunspot cycle, being maximum at solar … minimum.
Seabird surveys in January – March 2006 of a poorly known area of the Southern Ocean … adjacent to the East Antarctic coast identified six seabird communities, several of which were … comparable to seabird communities identified both in adjacent sectors of the Antarctic…
Australia and New Zealand have interests in, and some responsibilities for, a vast area of the Southern Ocean and the Antarctic continent to our south. These regions are integral components of the Earth system, directly coupled to the climate system, global sea level, biogeochemical cycles…
Recently, Vergani et al. (2008) examined the … climatic drivers of population dynamics … (weaning mass) and foraging performance … (diet variation) from southern elephant … seals, Mirounga leonina, in the Atlantic sector … of the Southern Ocean.
Compared to temperate and tropical relatives, some high-latitude marine species are large-bodied, a phenomenon known as polar gigantism. A leading hypothesis on the physiological basis of gigantism … posits that, in polar water…
Adélie penguin (Pygoscelis adeliae) diet is an important indicator of prevailing environmental conditions and … resource availability. In this study, dietary variation within and between years was studied with fatty acid … signature analysis (FASA), stomach content analysis (SCA)…
An extraordinary sea ice tongue developed near 85E over a period of 30 days in … April–May 2002. The ice tongue extended to the north more than 800 km from the … surrounding ice edge and covered an area greater than 200,000 km2.
A hot water drill was used to penetrate 480 m of ice to reveal a diverse benthic assemblage, dominated by … suspension-feeding invertebrates, under the Amery Ice Shelf (East Antarctica) at a location 100 km from open … water and at a depth of 775 m below sea level (840 m below the ice shelf surface)…
Integrated metamorphic and geochronological data place new … constraints on the metamorphic evolution of a Neoproterozoic … orogen in east Antarctica. Granulite-facies rocks from a 150 km … stretch of the Kemp Land coast reflect peak conditions involving … T870^9908C at P74^10 kbar…
Mineral equilibria modelling and electron microprobe chemical dating of monazite in granulite facies … metapelitic assemblages from the MacRobertson Land coastline, Rayner Complex, east Antarctica, are … consistent with an !anticlockwise" Neoproterozoic P–T–t path. Metamorphism occurred at c.
There are a range of chemical contaminants of concern in Antarctic marine environments as a … result of the activities of humans, including past waste disposal practices and accidental fuel … spills. Environmental guidelines for contaminants, including targets for contaminated site … remediation…
We report nitrate (NO3) nitrogen isotope ratios for seawater samples collected in the … Subantarctic Zone of the Southern Ocean during both winter and summer as part of the … Australian Antarctic CRC Subantarctic Zone (SAZ) Project.
: 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.
The isotopes of nitrate, which show different dynamics than nitrate concentration during physical transport and nitrate assimilation, provide a complementary constraint in the effort to understand nutrient transport and biogeochemical fluxes in the Southern Ocean. For instance…
Researchers in the SCAR- RiSCC program have been examining the interactions among … climate change, indigenous and alien species, and species and ecosystems function in … terrestrial and limnetic environments spanning an Antarctic environmental gradient of 30° … latitude. This international…
INTRODUCTION … The earliest Australian tide gauge to be operated in Antarctica was in 1912 when a gauge was installed at Cape Denison, George V Land, for 3 months during the Australasian Antarctic Expedition.
Around 145 different non-marine algae have been identified from the Windmill Islands region, Antarctica. About 24 of these occur in the snow. Nearly half of these, which includes all the dominant snow algae, complete their life cycles in the snow and do not grow elsewhere.
The Adare Trough, located 100 km NE of Cape Adare, Antarctica, is the extinct third arm of a Tertiary spreading ridge that … separated East from West Antarctica. We use seismic reflection data, tied to DSDP Site 274…
Significant changes in zooplankton composition have occurred in various ocean systems in … recent years. These changes can be quite dramatic, occurring within one or two seasons, as … happened with the regime shift in the North Sea and North Atlantic in the late 1980s.
The international cooperation that makes Antarctica a continent for science has enabled … observations of the Antarctic middle atmosphere that are not possible anywhere else on … Earth. Atmospheric radars operated by Australia (Davis), Japan (Syowa), the UK and the … USA (Rothera)…
Prior to environmental legislation in the 1980s, anthropogenic waste in Antarctica was often deposited into … landfill sites or into the sea. This resulted in metal contamination in terrestrial and near-shore marine … environments. In this study…
The collapse of the Larsen A and B and other ice shelves fringing the Antarctic Peninsula … coastline raises questions about the status of ice shelves in other parts of the continent. Are … the large ice shelves along the East Antarctic coast also in danger of permanent collapse…
Thorium-234 is increasingly used as a tracer of ocean particle flux, primarily as a means to estimate particulate organic carbon … export from the surface ocean. This requires determination of both the 234Th activity distribution (in order to calculate 234Th fluxes)…
U-Pb SHRIMP zircon analyses have been used to place time constraints on the Proterozoic reworking of Archaean rocks during the Rayner Structural Episode in the Oygarden Group of islands, Kemp Land, East Antarctica.