Publications matching your search query
Results 776 to 800 of 968
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…
The initial aim of the research, beginning in the 02/03 season, was to undertake some … regional mapping of the ice shelf, and to determine if marine ice could be differentiated from … meteoric ice employing the seismic technique. In 2002/2003…
Comparison of surface elevations measured by terrestrial survey in 1987 over the grounded … part of Totten Glacier with elevations measured by the Geophysical Laser Altimeter System … on NASA’s ICESat in 2003 shows that there has been substantial lowering of the surface of … around 10 m over 16…
The phase lag between atmospheric composition (air bubbles) and temperature (water isotopes) can be quantified from ice cores provided that the age difference between entrapped air and the surrounding air can be correctly estimated. This difference depends on the lock-in depth (LID)…
This study addresses the consequences of repeated … human handling on the survival of an endangered phocid, the southern elephant seal and the implications for wildlife … research. Southern elephant seal pups were repeatedly … handled during the first six weeks of their lives.
We present in situ observations of atmospheric and fast-ice parameters at Davis … (68°35'S, 77°58'E), East Antarctica. Surface measurements from 1969–2003 reveal … negative trends for summer and autumn surface-air temperatures, yet positive annual, winter and spring trends.
During January and February 2000 four research vessels, from Russia, the UK, Japan, and the United States…
In January and February 2000, a collaborative survey designed to assess the biomass of Antarctic krill across the … Scotia Sea was conducted aboard research vessels from Japan, Russia, the UK and the USA using active acoustic and … net sampling. Survey design, sampling protocols…
This paper summarizes the results of krill demographic studies from the Commission for the Conservation of … Antarctic Marine Living Resources 2000 Survey—a large-scale krill survey across the Scotia Sea conducted in January/ … February 2000.
Resolving the spatial variability in the population structure of Antarctic krill (Euphausia superba) requires a synoptic … sample, as in the design of the CCAMLR 2000 Survey. However, this approach is not appropriate for assessing … temporal variability.
Chlorophyll-a (Chl-a) concentrations in surface waters were measured at 137 hydrographic stations occupied by four … research vessels participating in the CCAMLR 2000 Survey and the values were compared to estimates from data … acquired by the SeaWiFS satellite.
In the mid 1920’s, Sir Alister Hardy developed a radical new method for sampling plankton continuously, rather than taking spot samples using conventional plankton nets. The CPR was first used in Antarctic waters during the 1925-27 Discovery expedition…
Haul-by-haul logbook catch and effort data from the Japanese krill fishery for the 1980/81 to 2003/04 fishing seasons were analysed. For a number of definitions of effort … and catch-per-unit-effort (CPUE)…
Antarctica is both the coldest and most arid continent on Earth, and experiences continuous light in midsummer and continuous darkness in midwinter. These factors reduce the growth rate of the continental Antarctic flora (mosses, lichens and algae) to a minimum.
The effects of ultra-violet radiation (UVR) stress on the growth, biochemical … composition and fatty acid profiles of four Antarctic microalgae from the University of Malaya Algae … Culture Collection (UMACC) were investigated. The microalgae studied were Chlamydomonas UMACC … 229…
The growth, biochemical composition and fatty acid profiles of six Antarctic microalgae cultured at different … temperatures, ranging from 4, 6, 9, 14, 20 to 30 ◦C, were compared. The algae were isolated from seawater, freshwater…
In Australia more than 300 vertebrates, including 43 insectivorous bat species, depend on hollows in … habitat trees for shelter, with many species using a network of multiple trees as roosts. We used roost-switching … data on white-striped freetail bats (Tadarida australis; Microchiroptera:
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)…
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)…
Ice-core records are a key resource for reconstructing Antarctic climate. However, a … number of physical processes preclude the simple interpretation of ice-core properties such as oxygen … isotopic ratios in terms of climate variables like temperature or sea-level pressure. We show that welldated…
ABSTRACT. We present highly resolved, annually dated, calibrated proxies for atmospheric circulation … from several Antarctic ice cores (ITASE (International Trans-Antarctic Scientific Expedition), Siple … Dome, Law Dome)…
An updated compilation of published and new data of major-ion (Ca, Cl, K, Mg, Na, NO3, SO4) and methylsulfonate (MS) concentrations in snow from 520 Antarctic sites is provided by the … national ITASE (International Trans-Antarctic Scientific Expedition) programmes of Australia, Brazil, China…
Abstract … Little effort has been devoted to differentiating between hydrocarbon losses through evaporation and biodegradation … in treatability studies of fuel-contaminated Antarctic soils. When natural attenuation is being considered as a treatment … option…
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.