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Geomagnetic storms in the Antarctic F-region. I. Diurnal and seasonal patterns for main phase effects
1 January, 1987
New analysis procedures are used to show that the main phase mid-latitude storm effects conform to consistent patterns in local time when suitable selection rules are applied, with averaging over…The tidal spectrum underneath Antarctic ice shelves
15 November, 1986
A year‐long tidal record has been obtained from beneath the George VI Ice Shelf, Antarctica. An unusual feature of the record is a significant response in tidal species 3 to…Read more on The tidal spectrum underneath Antarctic ice shelves
The local time, substorm, and seasonal dependence of electron precipitation at L ≈ 4 inferred from riometer measurements
1 November, 1986
We have examined the variations of electron precipitation at L ≈ 4 as inferred from riometer measurements of cosmic radio noise absorption made during 1975 at Siple Station and Halley…Jovian 1.2-kHz nonthermal continuum radiation
1 September, 1986
Nonthermal continuum is observed at 1.2 kHz on Voyagers 1 and 2 within the Jovian magnetosphere. It is seen in the magnetospheric cavity on both the dayside and nightside, being…A biometrical study of the family Tydeidae (Acari, Prostigmata) in the maritime Antarctic, with descriptions of three new taxa
1 July, 1986
A series of 50 male and 42 female mites of the prostigmatid family Tydeidae from the maritime Antarctic were each scored for 67 morphological characters. Ordination of each data set…Corticosterone secretion through long incubation shifts in Diomedea albatrosses
1 June, 1986
Blood samples were collected from free-living incubating Diomedea albatross during single incubation shifts, both daily (wandering albatross D. exulans and every 2 days (grey-headed albatross D. chrysostoma and black-browed albatross…Read more on Corticosterone secretion through long incubation shifts in Diomedea albatrosses
Lithostratigraphy of the Cretaceous strata of west James Ross Island, Antarctica
1 June, 1986 by Alistair Crame
As a result of recent field work, a new lithostratigraphic group is defined on the west coast of James Ross Island, Antarctica. Characterised by comparatively coarse-grained sediments, the Gustav Group…Read more on Lithostratigraphy of the Cretaceous strata of west James Ross Island, Antarctica
Reproductive endocrinology of the Black-browed albatross Diomedea melanophris and the Grey-headed albatross D. chrysostoma
1 February, 1986
Gonadal size and the circulating concentrations of two pituitary hormones (luteinizing hormone and prolactin) and three gonadal steroids (testosterone, progesterone and oestradiol‐17β) were measured in two closely related Diomedea albatrosses…Arthropod communities in a maritime Antarctic moss-turf habitat: multiple scales of pattern in the mites and collembola
1 February, 1986
(1) A sampling programme has been designed to detect whether multiple scales of pattern (or aggregation) occur in arthropod distributions. A secondary aim was to relate arthropod pattern with environmental…Storm-generated sandstone beds from the Upper Cretaceous of South Chile and their regional significance
1 January, 1986
Se describen areniscas del Cretacico Superior, expuestas en las cercanias de Punta Arenas, sur de Chile, las que exhiben laminacion convoluta y estratificacion cruzada, tipo "hummocky". Estas capas se formaron…Energy cost of contraction in fast and slow muscle fibres isolated from an elasmobranch and an Antarctic teleost fish
1 January, 1986
1. Single fast and small bundles of slow fibres were isolated from the muscles of an elasmobranch (dogfish, Scyliorhinus canicula) and an Antarctic teleost (Notothenia neglecta). A third fibre type…Evolutionary adaptation to temperature in fish muscle cross bridge mechanisms: tension and ATP turnover
1 January, 1986
1. Force and ATPase activity were measured in skinned, fast muscle fibres isolated from the myotomes of Antarctic, temperate and tropical fish. 2. Maximum isometric tension was inversely related to…ANDCHRON : Andean geochronology and metallogenesis. Final report for the Overseas Development Administration Research and Development Project on the application of geochronology, isotope geology and fluid inclusion studies to understanding the geological evolution of the Southern Andes and the setting and formation of metallic ore deposits therein
1 January, 1986
A multidisciplinary project was carried out in an attempt to improve understanding of the evolution and inter-relationship of magmatism and metalliferous mineralization in the central and southern Andes. This has…Effects of contrasting relative humidities on the cold tolerance of an Antarctic mite
1 January, 1986
Samples of adult Alaskozetes antarcticus, an Antarctic cryptostigmatid mite, were collected in winter and summer. In 4 separate experiments, mites were maintained under relative humidities in the range: 0, 26,…Read more on Effects of contrasting relative humidities on the cold tolerance of an Antarctic mite
Effects of ingestion of liquids on the cold tolerance of an Antarctic mite
1 January, 1986
Samples of a cryptostigmatid mite, Alaskozetes antarcticus, were collected during summer and winter on Signy Island, South Orkney Islands, in the maritime Antarctic. In four experiments, adult mites were maintained…Read more on Effects of ingestion of liquids on the cold tolerance of an Antarctic mite
The third hop whistler anomaly: possible evidence of df/dt-dependent wave amplification
1 January, 1986
On occasion the third hop of an echoing magnetospheric whistler exceeds the first hop in intensity over some low range of frequencies. Case studies show that this anomalous behavior can…Read more on The third hop whistler anomaly: possible evidence of df/dt-dependent wave amplification
Lipid content and composition of some midwater crustaceans from the Southern Ocean
1 January, 1986 by Andrew Clarke
The decapods Pasiphaea scotiae (Stebbing), P. rathbunae (Stebbing), Petalidium foliaceum Bate and Acanthephyra pelagica (Risso) and the mysid Gnathophausia gigas (W.-Suhm) have been sampled from the Southern Ocean. Lipid contents…Read more on Lipid content and composition of some midwater crustaceans from the Southern Ocean
The effects of temperature on 86Rb uptake by two species of Chlamydomonas(Chlorophyta, Chlorophyceae)
1 January, 1986 by Andrew Clarke
86Rb uptake was examined in two species of unicellular green algae, Chlamydomonas nivalis isolated from snow, and a cell wall-less mutant of the temperate freshwater Chlamydomonas reinhardii. In C. reinhardii…Radio-echo investigations of Ronne Ice Shelf
1 January, 1986
Since 1981, the British Antarctic Survey has flown 27 000 line kilometres over Ronne Ice Shelf, during which radio-echo ice thicknesses were recorded. An earlier map of ice thickness was…Late Mesozoic bipolar bivalve faunas
1 January, 1986 by Alistair Crame
Bipolar bivalve genera probably existed through the greater part of late Mesozoic (i.e. late Jurassic–late Cretaceous) time. Of the various theories put forward to account for their presence, those based…Environmental factors influencing decomposition rates in two Antarctic moss communities
1 January, 1986
Rates of disappearance of dead material of Polytrichum alpestre and Chorisodontium aciphyllum from a moss turf community and of Drepanocladus uncinatus, Calliergon sarmentosum and Cephaloziella varians from a moss carpet…Read more on Environmental factors influencing decomposition rates in two Antarctic moss communities
A simple graphical method for dealiasing digital ionosonde echo location data
1 January, 1986
A simple user interactive technique that allows digital ionosonde sky map echo location data to be dealiased uniquely is described. Unambiguous tracking of large‐scale ionospheric features is thus made possible.…Read more on A simple graphical method for dealiasing digital ionosonde echo location data
Empirical models of the electron concentration of the ionosphere and their value for radio communications purposes
1 January, 1986
The availability of representative empirical models of the variation of the electron concentration with height in the ionosphere is one critical element in the development of practical schemes for providing…Metabolic constraints on burst-swimming in the Antarctic teleost Notothenia neglecta
1 January, 1986
Immediate-energy-supply pathways were analysed during burst-swimming in white muscle of the Antarctic fish Notothenia neglecta, (collected during Austral summer 1984 near Signy Island, South Orkneys). Selected enzyme activities were determined,…Read more on Metabolic constraints on burst-swimming in the Antarctic teleost Notothenia neglecta
Effectiveness of the RMT8 system for sampling krill (Euphausia superba) swarms
1 January, 1986
The effectiveness of the Rectangular Midwater Trawl (RMT) for sampling krill swarms was studied by observing the behaviour of swarms in the vicinity of the net using echosounders. Large scale…Read more on Effectiveness of the RMT8 system for sampling krill (Euphausia superba) swarms
Growth rings in Cretacous and Tertiary wood from Antarctica and their palaeoclimatic implications
1 January, 1986 by Jane Francis
Although the Antarctic Peninsula now has a glacial climate, during the Cretaceous and early Tertiary it was sufficiently warm for forests to thrive, even at palaeolatitudes of 59°-62° S. The…Reproductive endocrinology of the Wandering Albatross Diomedea exulans in relation to biennial breeding and deferred sexual maturity
1 January, 1986
The reproductive endocrinology of the Wandering Albatross Diomedea exulans was studied at South Georgia to investigate the potential endocrine correlates of biennial breeding and of the acquisition of sexual maturity.…Recent measurements of Antarctic ozone depletion
1 January, 1986 by Jonathan Shanklin
Measurements of total ozone at Halley Bay, Antarctica, are presented for the six most recent observing seasons, 1980‐86, showing the consistency and progress of the spring ozone depletion. The principal…Read more on Recent measurements of Antarctic ozone depletion
Observations of forced oscillations of the magnetosphere by a geostationary satellite and an extensive ground magnetometer array
1 January, 1986
We present results from the analysis of magnetometer measurements of one of the clearest observations of a double resonance Pc4 pulsation to date. The Pc4, with a period of 55…Rock moisture content in the field and the laboratory and its relationship to mechanical weathering studies
1 January, 1986
Rock moisture content is a major control of mechanical weathering, particularly freeze‐thaw, and yet almost no data exist from field situations. This study presents moisture content values for rocks, taken…The effects of temperature and moisture on dark respiration in the foliose lichen Umbilicaria antarctica
1 January, 1986
The dark respiration of field‐fresh thalli of Umbilicaria antarctica Frey et Lamb is reported for temperatures from −5.5 to 19°C, and water contents from saturation to dryness. Detailed analysis of…Further evidence for the ionospheric contribution to convection within the plasmasphere
1 January, 1986
VLF goniometers have been used to study the direction of plasma convection in the evening plasmasphere. The results suggest that sometimes even for L values greater than 4 the electric…Read more on Further evidence for the ionospheric contribution to convection within the plasmasphere
Reduction of ambiguities in HF radar results through a revised receiving antenna array and sounding pattern
1 January, 1986
The reconfiguration of both the receiver dipole array and the pulse set used by the National Oceanic and Atmospheric Administration (NOAA) HF radar enables all ambiguity in polarization to be…Io plasma torus and the source of jovian kilometric radiation (bKOM)
1 January, 1986
One of the many discoveries by Voyagers 1 and 2 during their flyby of Jupiter was the detection of radio emission at kilometric wavelengths1,2 in the frequency range 20–500 kHz.…Read more on Io plasma torus and the source of jovian kilometric radiation (bKOM)
Staphylococcus aureus in Antarctica: carriage and attempted eradication
1 January, 1986
The carriage of Staphylococcus aureus was studied in a group of 28 men living in a totally isolated environment for a year. Initially, nasal, axillary and perineal swabs were taken…Read more on Staphylococcus aureus in Antarctica: carriage and attempted eradication
Typing of strains of Staphylococcus aureus by Western Blot analysis of culture supernates
1 January, 1986
Extracellular proteins produced by Staphylococcus aureus strains were examined by Western Blot analysis with blood donor plasma as a source of antibodies. Comparison of epidemiologically related strains showed strong concordance…The relationship between dominance behaviour, bill size and age group in Greater Sheathbills Chionis alba
1 January, 1986
A dominance hierarchy developed within a wintering flock of Greater Sheathbills which fed regularly at a concentrated artificial food source. Each bir's dominance position was determined from the proportion of…Proximal to distal sedimentological variation in a linear turbidite trough: implications for the fan model
1 January, 1986
Determination of geographically dependent sedimentological variation (‘proximality’) in ancient flysch deposits formed an important part of early turbidite studies. Attempts to quantify this variation highlighted anomalies which were neatly resolved…Ductile thrusting within subduction complex rocks on Signy Island, South Orkney Islands
1 January, 1986
A model involving repeated NNW-directed ductile thrusting in subduction complex rocks on Signy Island. South Orkney Islands, accounts for the consistent NNW-trending alignment of fold axes, stretching and shearing directions.…Read more on Ductile thrusting within subduction complex rocks on Signy Island, South Orkney Islands
Oxygen consumption and nitrogen excretion in the Antarctic brachiopod Liothyrella uva (Jackson, 1912) under simulated winter conditions
1 January, 1986 by Andrew Clarke, Lloyd Peck
The metabolism of the Antarctic brachiopod Liothyrella uva (Jackson, 1912) has been investigated in the laboratory under simulated winter conditions of low temperature and no food. Under such conditions the…Antarctic aquatic ecosystems as habitats for phytoplankton
1 January, 1986
Summary 1. The Southern Ocean is a large‐scale, relatively homogeneous upwelling ecosystem whose phytoplankton apparently grows suboptimally over much of its area. By contrast there is a wide variety of…Read more on Antarctic aquatic ecosystems as habitats for phytoplankton
Some environmental factors influencing phytoplankton in the Southern Ocean around South Georgia
1 January, 1986
Data on phytoplankton and zooplankton biomass, and physical and chemical variables, are combined with a published multivariate description of diatom species composition to interpret variation within an area around South…Pelites of the Glen Urquhart serpentinite–metamorphic complex, west of Loch Ness (Anomalous local limestone–pelite successions within the Moine outcrop: III)
1 January, 1986
The c. 6 km2 complex comprises graphitic/pyritic, mainly kyanite-rich pelites, interbanded with metalimestones and invaded by foliated serpentinites. It is enveloped by typically Moinian psammites, semipelites and pelites. Previously regarded…The poleward edge of the mid-latitude trough—its formation, orientation and dynamics
1 January, 1986
Data from the Advanced Ionospheric Sounder (AIS) deployed at Halley, Antarctica (76°S, 27°W; L = 4.2) and the Dynamics Explorer-2 spacecraft (DE-2) are used to investigate several aspects of the…Read more on The poleward edge of the mid-latitude trough—its formation, orientation and dynamics
Observations of the effects of DPY currents at sub-auroral latitudes
1 January, 1986
Magnetograms from Lerwick, Scotland and Halley, Antarctica are used to show that the effects of the DPY current system can frequently be detected at these sub-auroral observatories. It is found…Read more on Observations of the effects of DPY currents at sub-auroral latitudes
Distribution of the early-life phase of the Antarctic squid Galiteuthis glacialis in relation to the hydrology of the Southern Ocean in the sector 15� to 30�E
1 January, 1986 by Paul Rodhouse
During R.R.S. “Discovery” Cruise 100 in the Southern Ocean (1979), 620 specimens of the Antarctic cranchiid squid Galiteuthis glacialis (Chun) were caught in the RMT8 opening-closing net, to the south…