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Repeat hydrographic sections across the Antarctic Circumpolar Current (ACC) in Drake Passage are used to derive an empirical relationship between upper ocean … temperature and the baroclinic transport stream function.
The dissolved Barium (Bad) distribution in the whole … water column was examined along theWOCE SR3 line in the … Southern Ocean (Australian sector, late winter-spring 2001).
The thickness of marine diffusive boundary layers (DBLs) can be calculated from the friction velocity and the water … density (a function of temperature and salinity). However, DBL thickness scales differently with temperature, depending … on whether free-stream or friction velocity is used.
This study describes the distribution of Weddell seals Leptonychotes weddelli in winter(May-September 1999) at the Vestfold Hills, in Prydz Bay, East Antarctica. Specifically, we describe the spatial extent of haul-out sites in shore - fast sea-ice, commonly referred to as fast-ice.
A sparse network of meteorological observations in Antarctica extends back only to the late 1950s, making it difficult to characterize Antarctica's climate behavior in the context of natural climate variability and global warming. We show that composites of stable isotope (dD and d18O)…
A series of in situ and aquarium experiments were conducted in the vicinity of the … Bailey Peninsula area (Casey Station, East Antarctica) to investigate the bioturbation behaviour of the … Antarctic spatangoid urchin Abatus ingens (Koehler 1928). Rates of sediment transport by A.
Ground layer Adaptive Optics (GLAO) is a new variant of adaptive optics that aims at correcting the seeing … over a wide field of view by conjugating the deformable mirror to the boundary layer altitude.
The primary limitation to ground based astronomy is the Earth's atmosphere. The atmosphere above the … Antarctic plateau is fundamentally di erent in many regards compared to the atmosphere at temperate sites. The … extreme altitude…
Abstract. A good astronomical site must fulfill several criteria including low atmospheric turbulence and low wind speeds. is therefore important to have a detailed knowledge of the temperature and wind conditions of a location considered for future … astronomical research.
We evaluate the effect that radome transparency has on atmospheric … opacity measurements performed by the skydip technique. We show that, except at rather high opacities, it is not sufficient to ignore losses in the … radome (or “window”)…
Geophysical inverse methods are used to calculate the basal motion of a glacier. They are applied to a one-dimensional forward model that can be linearized to make the analysis simpler. The inverse method finds a solution that fits the data within a given error.
Lead, Ba and Bi concentrations and Pb isotopic compositions have been measured in Antarctic Law Dome (66.8‡S, 112.4‡E) ice dated from 1814 AD to 1819 AD by hermalionisation mass spectrometry to investigate the possible deposition of heavy metals from the 1815 AD eruption of Tambora volcano (8.5‡S…
Black-browed albatrosses breed at four known locations in Chile: Diego de Almagro (15,900 pairs, Lawton et al. 2003), Evangelistas (4,700; Arata et al. 2003), Ildefonso (47,000; this presentation) and Diego Ramirez (55,300; Robertson et al. unpublished). After the Falkland Islands/Islas Malvinas…
Chile is a fishery country with important artisanal and industrial longline fleets during the last 30 year. Main fishing resources in southern Chile are Patagonian toothfish, Ling and Austral hake. All these fisheries are suspected to have high seabird mortality.
In order to improve our understanding of wintertime polar ozone losses, two ozonesonde Match campaigns were performed. The first one was carried out in the Arctic winter 2002/03. About 450 co-ordinated ozonesondes were launched from late November 2002 to March 2003.
To measure chemical induced ozone loss in the Arctic lower stratosphere the Match method was developed. Trajectory calculations based on stratospheric wind fields of the European Center of Medium-range Weather Forecasts (ECMWF) are used to track and to predict the ways of air parcels.
A series of recruitment experiments using Artificial Substrate Units were deployed in the nearshore waters of Casey Station, (66o17’S, 110o32’E) to investigate spatial and temporal variation in the community structure of small motile invertebrates.
A biological/oceanographic survey was conducted around the Antarctic Divergence (AD) off Adelie Land, Antarctica by the RTV Umitaka-Maru III of Tokyo University of Fisheries in the 1995/1996 Austral summer. Investigations were included (1) characteristics of oceanic structure, (2)…
Species of the genus Pseudoalteromonas are frequently isolated from marine ecosystems and appear to be particularly abundant in Antarctic coastal waters.
A group of pigmented, psychrophilic, strictly aerobic chemoheterotrophs isolated from sea-ice cores collected from coastal areas of eastern Antarctica was found to represent a novel 16S rRNA lineage within the gamma subclass of the Proteobacteria, adjacent to the genus Alteromonas.
In order to improve our understanding of the January losses of ozone in the Arctic vortex two ozonesondes Match campaigns are scheduled within the project "Quantitative Understanding of Ozone losses by Bipolar Investigations" (QUOBI).