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Evolutionary history of Antarctica
1 January, 1994 by Alistair Crame
One of the most important breakthroughs in Antarctic geological research over the last three decades has been the elucidation of the continent’s fossil record. Although fossils have been known since…Mean thermospheric winds observed from Halley, Antarctica
1 January, 1994
Thermospheric winds on a total of 237 nights have been studied for the effects due to geomagnetic activity, solar flux, and season. The observations have been made from 1988 to…Read more on Mean thermospheric winds observed from Halley, Antarctica
Hydrocarbons in the Antarctic marine environment: monitoring and background
1 January, 1994
The Antarctic marine ecosystem is proposed as an environment in which to monitor global hydrocarbon background levels. Hydrocarbon concentrations are probably uniform throughout the Southern Ocean and it is difficult…Read more on Hydrocarbons in the Antarctic marine environment: monitoring and background
Dead or alive, night or day: how do albatrosses catch squid?
1 January, 1994
For many albatross species squid are important prey. Whether albatrosses depend on scavenging (e.g. of vomit from cetaceans, post-spawning die-offs or fishery waste) or on live-capture of squid (e.g. via…Read more on Dead or alive, night or day: how do albatrosses catch squid?
Taxonomic studies of Achnanthes(Bacillariophyta) in freshwater maritime antarctic lakes
1 January, 1994
Eleven species of Achnanthes from Signy Island, South Orkney Islands are described including one new species. Benthic algal material from a range of shallow lakes of varying trophic status was…Read more on Taxonomic studies of Achnanthes(Bacillariophyta) in freshwater maritime antarctic lakes
Hexapodibius boothi sp. n., a new species of semi-terrestrial tardigrade from the Maritime Antarctic
1 January, 1994 by Sandra McInnes, Sandra McInnes
Hexapodibius boothi sp.n., a new species of semi-terrestrial tardigrade from fellfield mineral soil material at the Dundee Island (in the Maritime Antarctic) is described.Conflicts of interest in the use of Antarctica
1 January, 1994
The International Geophysical Year of 1957–58 demonstrated the effective use of the Antarctic for peaceful international scientific activity, and the Antarctic Treaty of 1961 acknowledges the important contribution of science.…Timescale of ovarian maturation in Notothenia coriiceps; evidence for a prolonged adolescent phase
1 January, 1994
Ovarian maturation in Notothenia coriiceps is known to include a period during which yolk deposition begins to take place. This ‘adolescent’ phase was thought originally to last for about 1…Expenditure, investment, and acquisition of energy in southern elephant seals
1 January, 1994
Information on the expenditure and investment of energy in southern elephant seals, Mirounga leonina , was collected during breeding and molt over four field seasons at South Georgia. Weight and…Read more on Expenditure, investment, and acquisition of energy in southern elephant seals
Measurements of stratospheric composition using a star pointing spectrometer
1 January, 1994 by Howard Roscoe
Measurements of stratospheric composition have been made with a novel star-pointing spectrometer. The instrument consists of a telescope that focuses light from stars, planets, or the moon onto a spectrometer…Read more on Measurements of stratospheric composition using a star pointing spectrometer
Rapid population increases in native vascular plants in the Argentine Islands, Antarctic Peninsula
1 January, 1994
The number of individual plants and colonies of the two native Antarctic vascular plants, Colobanthus quitensis and Deschampsia antarctica, have been monitored between 1964 and 1990 on three islands in…EISCAT observations of unusual flows in the morning sector associated with weak substorm activity
1 January, 1994 by Mervyn Freeman, Michael Pinnock
A discussion is given of plasma flows in the dawn and nightside high-latitude ionospheric regions during substorms occurring on a contracted auroral oval, as observed using the EISCAT CP-4-A experiment.…Distribution and abundance of juvenile Loligo gahi in Falkland Island waters
1 January, 1994 by Paul Rodhouse
Four research surveys of Falkland Island waters were carried out to determine the distribution and abundance of the early life-history stages of Loligo gahi (d'Orbigny, 1835) in the austral winter…Read more on Distribution and abundance of juvenile Loligo gahi in Falkland Island waters
Feeding studies on Onychiurus arcticus (Tullberg) (Collembola: Onychiuridae) on West Spitsbergen
1 January, 1994 by William Block
The feeding biology of the arctic collembolan Onychiurus arcticus (Tullberg) is described from West Spitsbergen, based on a combination of gut content analyses for field collected and microcosm-living animals, together…Metamorphosed fragments of oceanic crust in the upper Paleozoic Chonos accretionary complex, southern Chile
1 January, 1994
A 15 km2 body of metabasite with occasional pillow structures occurs within the Paleozoic accretionary complex in Isla Italia and Isla Dring. Trace elements and REE geochemistry indicate similarities between…Simulated climate change: a field manipulation study of polar microarthropod community response to global warming
1 January, 1994
Passive cloches were deployed at three altitudinally distinct sites on Signy Island, maritime Antarctica, to investigate the effect of ameliorated thermal environment upon fellfield microarthropod communities Temperature was monitored at…The annual cycle of planktonic ciliates in nearshore waters at Signy Island, Antarctica
1 January, 1994 by Andrew Clarke
The abundance and biomass of marine planktonic ciliates in Borge Bay, Signy Island, were determined at monthly intervals between April 1990 and June 1991. At least 24 different ciliate taxa…Read more on The annual cycle of planktonic ciliates in nearshore waters at Signy Island, Antarctica
Zoogeographic distribution of terrestrial/freshwater tardigrades from current literature
1 January, 1994 by Sandra McInnes, Sandra McInnes
The literature on terrestrial and freshwater Tardigrada is relatively limited, being concerned with 617 species world wide. Many of the references are in obscure publications. This paper attempts to bring…Valley asymmetry on south-eastern Alexander Island, Antarctica, and valley forms in the High Drakensberg, South Africa
1 January, 1994
Field data from south-eastern Alexander Island, Antarctica, are used to develop a model for the formation of asymmetrical valley-side slopes. Enhanced weathering and transport causes reduction in the gradient of…Volcanism associated with extension in an Oligocene—Miocene arc, southwestern Viti Levu, Fiji
1 January, 1994
The Wainimala Group rocks of southwestern Viti Levu, Fiji, represent part of an Oligocene-Miocene island arc. Some of the early volcanism in this arc took place on a substrate of…Modelling mass and energy exchange over polar snow using the DAISY model
1 January, 1994
In the Antarctic winter of 1991 an extensive series of micro- meteorological and snow cover measurements were made as part of the second Stable Boundary Layer Experiment (STABLE II) at…Read more on Modelling mass and energy exchange over polar snow using the DAISY model
The ULF modulation of ELF-VLF emissions close to the magnetospheric boundary
1 January, 1994
The spatial extent and temporal behaviour of quasi-periodic (QP) intensity modulations of 0.5-2kHz ELF-VLF emissions were investigated in a comparative study of data collected at three Antarctic stations. Frequently, the…Read more on The ULF modulation of ELF-VLF emissions close to the magnetospheric boundary
Geological map of Adelaide Island to Foyn Coast
1 January, 1994
Geological map and supplementary textRead more on Geological map of Adelaide Island to Foyn Coast
Aging immature black-browed and grey-headed albatrosses using moult, bill and plumage characteristics
1 January, 1994
We describe how to age immature Black-browed Diomedea melanophris and Grey-headed Albatrosses D. chrysostoma up to age 6 years (when they have usually acquired adult characteristics), from a combination of…Ice sheet retreat from the Antarctic Peninsula shelf
1 January, 1994 by Robert Larter
Side-scan sonar and sub-bottom acoustic profiler data and sediment cores reveal the processes that controlled sediment transport and deposition on the continental shelf of the Antarctic Peninsula Pacific margin off…Read more on Ice sheet retreat from the Antarctic Peninsula shelf
Supercooling points and water content in Acari
1 January, 1994
Supercooling point is correlated with total body water content in a wide range of terrestrial Acari from Antarctic, sub-Antarctic and temperate regions, which have not been cold-hardened by prior exposure…The Acari of fresh- and brackish water habitats in the Antarctic and sub-Antarctic regions
1 January, 1994
Neither the benthic Halacaroidea nor nektonic Hydrachnidia, characteristic of temperate and tropical freshwater mite faunas are represented among the twenty four species and sub-species of Acari recorded from the Antarctic…The oceanic environment beneath the northwest Ronne Ice Shelf, Antarctica
1 January, 1994 by Keith Makinson, Keith Nicholls
Oceanographic data have been obtained from beneath the Ronne Ice Shelf at a site on the southeastern side of a sea-floor trough, the Ronne Depression. The data consist of 5…Read more on The oceanic environment beneath the northwest Ronne Ice Shelf, Antarctica
Simultaneous two hemisphere observations of the presence of polar patches in the nightside ionosphere
1 January, 1994 by Michael Pinnock
The presence of polar patches as observed simultaneously in the same magnetic meridian of opposite nightside ionospheres by coherent and incoherent scatter radars are described. The patches appear to be…Utility and limits of biomass spectra: the nekton community sampled with the RMT 25 in the Scotia Sea during austral summer
1 January, 1994 by Eugene Murphy, Paul Rodhouse
An RMT 25 opening/closing net was used to sample the nekton community at 2 stations in the ice free zone (IFZ) of the Scotia Sea (Stn 1 approximately 10 nautical…Using stars for remote sensing of the Earth’s stratosphere
1 January, 1994 by Howard Roscoe
A new UV–visible spectrometer system that measures the absorption of light from stars and planets by constituents in the Earth’s atmosphere is described. Because it can be used to make…Read more on Using stars for remote sensing of the Earth’s stratosphere
Validating and improving elevation data of a satellite-image map of Filchner-Ronne Ice Shelf, Antarctica, with results from ERS-I
1 January, 1994 by David Vaughan
A satellite-image map with surface-elevation contours of Filchner Ronne Ice Shelf has been published previously as a topographic map. The image map was constructed from a mosaic of 69 Landsat…Sea-bed depths at the mouth of Rutford Ice Stream, Antarctica
1 January, 1994 by Andy Smith
Seismic measurements of ice- and water column thickness have been made on Rudard Ice Stream where it joins the Ronne Ice Shelf. Assuming that the ice is in hydrostatic equilibrium,…Read more on Sea-bed depths at the mouth of Rutford Ice Stream, Antarctica
The Grenville Province within Antarctica: a test of the SWEAT hypothesis
1 January, 1994
Geochronological, isotopic and aeromagnetic data, including a new Rb-Sr isochron of 1076 ± 7 Ma for volcanic rocks at Bertrab Nunatak, Coats Land, confirm the existence of rocks of Grenvillian…Read more on The Grenville Province within Antarctica: a test of the SWEAT hypothesis