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Decadal timescale links between Antarctic Peninsula ice-core oxygen-18, deuterium and temperature
1 January, 1993
The Antarctic Peninsula region has exprienced a long-term warming trend over the twentieth century, with the 1971-90 mean at Faraday being 1.9°C warmer than the mean over 1903-41 based on…The depositional pattern and distribution of glacial-interglacial sequences on the Antarctic Peninsula Pacific margin
1 January, 1993 by Robert Larter
The outer shelf on the Antarctic Peninsula Pacific margin south of 63°30′S is underlain by Pliocene-Pleistocene prograding sequences which have been produced mainly by the action of ice sheets grounded…Water as a limiting factor in the Antarctic terrestrial environment: a biogeographical synthesis
1 January, 1993
The question is posed: "what limits the presence, distribution, and abundance of life in Antarctica?" Traditionally, continental isolation has been considered to restrict the arrival of new species and extreme…Seismic characteristics of an airgun fired over snow
1 January, 1993 by Ed King
An alternative seismic source was investigated in an experiment conducted near Rothera Station, Antarctic Peninsula. The source was an airgun fired above the snow surface. Comparison shots using explosive and…Read more on Seismic characteristics of an airgun fired over snow
Control of near-surface winds over an Antarctic ice shelf
1 January, 1993 by John King
Simple models are used to assess the factors controlling near-surface winds over an Antarctic ice shelf. Observations from Halley Station and an automatic weather station situated close to the coastal…Read more on Control of near-surface winds over an Antarctic ice shelf
Ionospheric convection response to slow, strong variations in a northward interplanetary magnetic field: A case study for January 14, 1988
1 January, 1993
We analyze ionospheric convection patterns over the polar regions during the passage of an interplanetary magnetic cloud on January 14, 1988, when the interplanetary magnetic field (IMF) rotated slowly in…Effects of maternal age and condition on parturition and the perinatal period of Antarctic fur seals
1 January, 1993
The effect of maternal age and condition on the date of parturition and the duration of the perinatal period of Antarctic fur seals at Bird Island, South Georgia, were investigated…Seafloor spreading in the Weddell Sea and southwest Atlantic since the Late Cretaceous
1 January, 1993
Geosat radar altimetry defines a pattern of closely spaced curvilinear gravity anomalies in the northern Weddell Sea and adjacent parts of the southwest Atlantic. These anomalies are caused by a…Read more on Seafloor spreading in the Weddell Sea and southwest Atlantic since the Late Cretaceous
Antarctic larval fish assemblages: a review
1 January, 1993
Larval fish assemblages are considered within the context of the unique ichthyofauna which evolved in Antarctic waters as a result of environmental cooling, glaciation, and isolation by the Antarctic polar…Factors affecting the growth rate and mass at weaning of Antarctic fur seals at Bird Island, South Georgia
1 January, 1993
We studied the influence of sex of pup, maternal age, birth date of pup, number of foraging trips, and the mean duration of foraging trips at sea and nursing visits…Controls on sedimentation at convergent plate-margins
1 January, 1993
Convergent margins are areas of geological complexity. Basins which occur in the same position relative to a volcanic arc may owe their origin to more than one process of formation.…Read more on Controls on sedimentation at convergent plate-margins
Interpretation of acoustic data at two frequencies to discriminate between Antarctic krill (Euphausia superba Dana) and other scatterers
1 January, 1993 by Eugene Murphy
A visual classification was carried out of echo trace characteristics derived from 113 integration intervals of 1 n mi (nautical mile) each taken from the Southern Ocean in the area…Antarctic krill aggregation characteristics from acoustic observations in the Southwest Atlantic Ocean
1 January, 1993
The distributional features and physical characteristics of 4830 krill (Euphausia superba Dana) aggregations detected acoustically in the Southwest Atlantic between 26 January and 21 February 1981 are described. Results are…Differences in backscattering strength determined at 120 and 38 kHz for three species of Antarctic macroplankton
1 January, 1993 by Peter Ward
The ability to acoustically separate zooplankton species is an important requirement for ecological studies and to improve biomass estimates. In order to distinguish between Euphausia superba and other swarm-forming macroplankters…High-resolution dielectric profiling of ice cores
1 January, 1993
A new method for high-resolution (3 mm) dielectric profiling of ice cores is described. The method measures the capacitance and conductance of the ice at a single frequency (chosen to…Read more on High-resolution dielectric profiling of ice cores
Annual survival of Sparrowhawks Accipiter nisus breeding in three areas of Britain
1 January, 1993
Annual survival of breeding female Sparrowhawks Accipiter nisus was estimated by a capture-recapture procedure in three different areas, Eskdale and Annandale in southern Scotland and Rockingham Forest in east-central England.…Read more on Annual survival of Sparrowhawks Accipiter nisus breeding in three areas of Britain
Extending the Antarctic meteorological record using ice-sheet temperature profiles
1 January, 1993 by Keith Nicholls
Two vertical ice temperature profiles from locations in the Antarctic Peninsula unaffected by meltwater are presented. A simple time-dependent heat diffusion-advection model is used to infer broad surface temperature variations…Read more on Extending the Antarctic meteorological record using ice-sheet temperature profiles
Growth in the bivalve Yoldia eightsi at Signy Island, Antarctica, determined from internal shell increments and calcium-45 incorporation
1 January, 1993 by Andrew Clarke
The growth rate of the infaunal nuculanid bivalve Yoldia eightsi at Factory Cove, Signy Island, South Orkney Islands (maritime Antarctica), was estimated from internal shell increments and 45Ca incorporation of…Thelidium austroatlanticum (verrucariaceae), a new species from the South Orkney Islands
1 January, 1993
Thelidium austroatlanticum sp. nov. is described from Signy island; it is characterized by an epilithic thallus, more or less appressed involucrellum, and 1-septate spores 30–40 μm long. Thelidium incavatum is…Summer and winter diet of four carnivorous copepod species around South Georgia
1 January, 1993 by Peter Ward
The natural diets of adult female Euchaeta antarctica, E. farrani, E. rasa and E. biloba, as well as male and female copepod stage V E. antarctica, were compared through gut…Read more on Summer and winter diet of four carnivorous copepod species around South Georgia
The tissues of articulate brachiopods and their value to predators
1 January, 1993 by Lloyd Peck
The punctate brachiopods Liothyrella neozelanica and Neothyris lenticularis were compared with the impunctate Notosaria nigricans and the bivalve molluscs Mytilus edulis and Lima colorata in terms of the force needed…Read more on The tissues of articulate brachiopods and their value to predators
Calibration of a point-counting technique for estimation of biogenic silica in marine sediments
1 January, 1993
The simple technique of point counting is very quick and is suitable for shipboard use, or in any study where high accuracy is not necessary. Point-counting smear slides yields results…A synonymic catalogue of the Acari from Antarctica, the sub-Antarctic Islands and the Southern Ocean
1 January, 1993
The records, taxonomy and geographical distribution of 528 species of Acari collected from the Antarctic, sub-Antarctic islands and the Southern Ocean are collated. Included are free-living and phoretic mites, parasites…Ecology of the littoral Halacaridae (Acari: Prostigmata) of South Georgia in the sub-Antarctic
1 January, 1993
Nine species of marine littoral Halacaridae were collected from Husvik Harbour, South Georgia, all of which are new to the fauna of the island. These include Isobactrus microdens Newell, Rhombognathus…Revised interpretations of Mesozoic palaeogeography and volcanic arc evolution in the northern Antarctic Peninsula region
1 January, 1993
Terrestrial sedimentary rocks at Hope Bay, northern Graham Land are well known for their diverse but poorly-preserved fossil flora, previously assigned ages ranging from Early Jurassic-Early Cretaceous. The beds form…Caytoniales in Early Jurassic floras from Antarctica
1 January, 1993
The Caytoniales are represented in the Early Jurassic floras from Hope Bay and Botany Bay, Antarctica, as completeleaves and detached leaflets (Sagenopteris) together with microsporophylls (Caytonanthus). Systematic sampling at Botany…Read more on Caytoniales in Early Jurassic floras from Antarctica
Temperature and Antarctic plankton community respiration
1 January, 1993
Antarctic plankton community respiration rates were determined from in vitro changes in dissolved oxygen. Oxygen consumption rates, measured at in situ temperatures between 0 and 6°C, were found to lie…Read more on Temperature and Antarctic plankton community respiration
Unravelling dates through the ages: geochronology of the Scottish metamorphic complexes
1 January, 1993
The paper by Giletti et al. 1961 is seen as a major landmark in the evolution of dating techniques in polymetamorphic terrains. We consider certain critical issues from each of…Read more on Unravelling dates through the ages: geochronology of the Scottish metamorphic complexes
New significance for Antarctic biological collections and taxonomic research
1 January, 1993
Collections of preserved terrestrial and freshwater plants and animals, made since the earliest expeditions to the Antarctic and sub-Antarctic, have been the basis of our understanding of the biological composition…Read more on New significance for Antarctic biological collections and taxonomic research
Magnetospheric electron temperatures inferred from whistler dispersion measurements
1 January, 1993
Electron temperatures in the vicinity of the magnetospheric equator were estimated from dispersion measurements on 24 whistlers observed and digitally recorded at Halley, Antarctica (76 deg S, 27 deg W;…Read more on Magnetospheric electron temperatures inferred from whistler dispersion measurements
Late Miocene valley-confined subglacial volcanism in northern Alexander Island, Antarctic Peninsula
1 January, 1993
Isolated, Late Miocene volcanogenic sequences in northern Alexander Island, Antarctic Peninsula, form an unusual, cogenetic association of volcaniclastic, sandy-gravelly lithofacies (including tillites) and volcanic (lava/hyalocalstite) lithofacies. Using simple lithofacies analysis…The changing face of late Precambrian and early Palaeozoic reconstructions
1 January, 1993
The SWEAT hypothesis, linking the Southwest US and East Antarctica as conjugate rift margins of a Neoproterozoic continent has lead to major revisions of late Precambrian and early Cambrian reconstructions.…Read more on The changing face of late Precambrian and early Palaeozoic reconstructions
Extreme adaptive life-cycle in a high arctic aphid, Acyrthosiphon svalbardicum
1 January, 1993 by William Block
1 The year-round biology of a high arctic aphid is described for the first time. 2 The life-cycle is shown to be genetically determined, and thus markedly different to temperate…Read more on Extreme adaptive life-cycle in a high arctic aphid, Acyrthosiphon svalbardicum
Identification of three previously unknown morphs of Acyrthosiphon svalbardicum Heikinheimo (Hemiptera: Aphididae) on Spitsbergen
1 January, 1993 by William Block
Identification of three previously unknown morphs of Acyrthosiphon svalbardicum Heikinheimo (Hemiptera: Aphididae) on Spitsbergen.Relating the occurrence of crevasses to surface strain rates
1 January, 1993 by David Vaughan
The presence of crevasses on the surface of ice masses indicates that a fracture criterion has been met. Understanding how crevasses form will provide information about the stress and strain-rate…Read more on Relating the occurrence of crevasses to surface strain rates
A synthesis of remote sensing data on Wilkins Ice Shelf, Antarctica
1 January, 1993 by David Vaughan
Wilkins Ice Shelf has an area of 16000 km2 and lies off the west coast of the Antarctic Peninsula bounded by Alexander, Latady, Charcot and Rothschild islands. Several ice shelves,…Read more on A synthesis of remote sensing data on Wilkins Ice Shelf, Antarctica
Aspects of cold hardiness in Steganacarus magnus (Acari: Cryptostigmata)
1 January, 1993 by William Block
Supercooling points and the presence of antifreeze compounds were measured for both nymphs and adults of Steganacarus magnus (Nicolet) collected from a coniferous forest soil in southern England in March,…Read more on Aspects of cold hardiness in Steganacarus magnus (Acari: Cryptostigmata)
Worldwide atmospheric gravity-wave study in the European sector 1985–1990
1 January, 1993
Four campaigns of the Worldwide Atmospheric Gravity-wave Study (WAGS) have taken place in the European sector. On many occasions the onset of auroral activity in the evening and midnight sector,…Read more on Worldwide atmospheric gravity-wave study in the European sector 1985–1990