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The dominant generator of the atmospheric electric circuit is meteorological activity in the … form of thunderstorms and electrified clouds, while the flow of the current within the circuit is … principally controlled by atmospheric ionisation by cosmic rays.
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…
Water mass volumes in the Southern Ocean are evaluated in a section between … Antarctica and Tasmania for the period 1991–1996. Antarctic Bottom Water … consisted of Weddell Sea Bottom Water and water formed along the Ade´ lie … Coast.
During January and February 2000 four research vessels, from Russia, the UK, Japan, and the United States…
Antarctic macroalgae survive extended periods of darkness followed by rapid and extreme increases in irradiance when sea-ice … breaks out in summer. Algae from dark, ice-covered locations had low values of saturating irradiance (Ek: 4–19 mmol photons … m2 s1)…
The Southern Hemisphere westerlies in the southwest Pacific are known to have waxed and waned numerous times during the last … two glacial cycles, though even semi-continuous histories of the westerlies extend back no more than about 20,000 years.
Within a 6-minute span on January 20, 2005, the count rate registered by a neutron monitor at the sea level … station of McMurdo, Antarctica increased by a factor of 30, while the rate at the high-altitude (2820 m) site … of South Pole increased by a factor of 56.
(DMSP) in a variety of sea ice and seawater habitats in the Antarctic Sea Ice Zone (ASIZ) during spring and summer. Sixty-two sea ice cores of pack and fast ice were collected from twenty-seven sites across an area of the eastern ASIZ (648E to 1108E; and the Antarctic coastline north to 628S).
In many temperate regions, fuel and oil spills are sometimes managed simply by allowing natural degradation to … occur, while monitoring soils and groundwater to ensure that there is no off-site migration or on-site impact.
The dynamics of animal populations are determined by several key demographic parameters, which vary over time with resultant changes in the status of the population. When managing … declining populations, the identification of the parameters that drive such change are a high priority…
The southern annular mode is the leading mode of Southern Hemisphere circulation variability, the … temporal evolution of which is characterized by large amplitudes and significant persistence.
Population counts are useful for monitoring populations as they can indicate both the ecological history and the present condition of a population.
Molecular techniques have recently been used to identify prey in the scats of pinnipeds. This new approach has developed in an attempt to overcome some of the inadequacies of traditional diet assessment methods.
A numerical procedure is presented for analysis of backscatter spectra recorded by an atmospheric Doppler lidar experiment. The recorded spectra are modelled by an analytic function of five parameters.
Spatio-temporal variability of zooplankton community structure off east Antarctica (90 to 160°E) was studied from 1988 to 1996 based on samples collected by the Japanese icebreaker Shirase. Three community groups with distinctive species compositions were obtained by cluster analysis.
The international Antarctic science community collects an amazing amount of information about wildlife. Traditionally, this information has gone into field notebooks and more recently, software such as Excel®.
Induction magnetometer data recorded at three closely spaced sites (110km) in Antarctica (mlat -75°) have been examined for ionospheric signatures of the outer magnetosphere and cusp/cleft regions. Cross-phase analysis of the 1–10 mHz band…
The foraging behaviour of Adélie penguins Pygoscelis adeliae was studied simultaneously at Shirley Island (SI, 110° E) and at Petrel Island (PI, 140° E) in approximate conjunction with the ship-based krill survey conducted on board the RSV Aurora Australis.
The seasonal variation in the foraging behaviour of king penguins Aptenodytes patagonicus was studied at Heard Island (53°05S, 73°30E) during 1992/93. On seven occasions throughout the breeding cycle…
A solid-phase extraction method based on an ion-exchange retention mechanism … has been used for in-line preconcentration of inorganic anions prior to … their separation by capillary electrophoresis (CE).
High-resolution Fabry-Perot spectrometer observations of the OH(62) Q1(1) line, l834.46 nm, were made at Mawson, 67.6ºS 62.9ºE, and Davis, 68.6ºS 78.0ºE, Antarctica, in 1997. The observing program resulted in three sets of continuous OH observations suitable for tidal analysis: July 25…
The populations of two non-native Dipterans have been established at two Antarctic research stations … since at least 1998. Both belong to Sciaridae ("black … fungus midge"), and have been determined to the genus … Lycoriella. At Rothera Research Station, Antarctic … Peninsula…
Abstract: The structure and variability of Southern Ocean fronts south of New Zealand are described based … on fifteen summer expendable bathythermograph (XBT) sections obtained between 1994 and 2001.
Seasonal and interannual variations of the mixed layer properties in the Antarctic Zone (AZ) south of Tasmania are … described using7 WOCE/SR3 CTD sections and 8 years of summertime SURVOSTRAL XBT and thermosalinograph … measurements between Tasmania and Antarctica. The AZ…
The aim of this project was to determine both … the diurnal changes in photosynthetic activity of Antarctic … sea ice algae and also the protective mechanisms … they use to mitigate the effects of in situ UV radiation.