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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
Late Cretaceous palaeoenvironments and biotas: an Antarctic perspective
1 December, 1992 by Alistair Crame
The Cretaceous period is often regarded as one of "greenhouse" warmth, with perhaps its acme occurring in the late Albian stage (100 Ma ago). However, it is now apparent that,…Read more on Late Cretaceous palaeoenvironments and biotas: an Antarctic perspective
Temperature variation and its biological significance in fellfield habitats on a maritime Antarctic island
1 December, 1992 by William Block
Temperatures within soil and plant habitats on Signy Island in the maritime Antarctic were measured during 1987. Four sites were monitored using minithermistors attached to a data logging system. Three…Bycatch of fish in the South Atlantic krill fishery
1 December, 1992
Icefish (Champsocephalus) were taken as bycatch during krill fishing operations from a research vessel. The data indicate that the bycatch of fish in the commercial krill fishery may be significant…Read more on Bycatch of fish in the South Atlantic krill fishery
Short-offset seismic refraction results near Rothera Station, Antarctic Peninsula
1 December, 1992 by Ed King
Details are presented of seismic velocities at a site near Rothera Point, Adelaide Island, Antarctic Peninsula. The snow/firn velocity structure was obtained using a 24-channel Bison 9000 seismograph, recording the…Read more on Short-offset seismic refraction results near Rothera Station, Antarctic Peninsula
Sea salt dependent electrical conduction in polar ice
1 December, 1992
A 45 m length of ice core from Dolleman Island, Antarctic Peninsula has been dielectrically analysed at 5 cm resolution using the dielectric profiling (DEP) technique. The core has also…Read more on Sea salt dependent electrical conduction in polar ice
Abundance and diurnal vertical distribution of fish larvae in early spring and summer in a fjord at South Georgia
1 December, 1992
The diurnal vertical distribution and abundance of fish larvae was studied by net samples in the 265 m deep fjord of Cumberland East Bay, South Georgia. In early spring the…Maximum dive depths attained by South Georgia diving petrel Pelecanoides georgicus at Bird Island, South Georgia
1 December, 1992
Maximum dive depths have been recorded for a number of sea-bird species using simple lightweight capillary gauges (Burger & Wilson 1988). So far these studies have been confined to penguins…An investigation into the nonlinear frequency shift in magnetospherically propagated VLF pulses
1 December, 1992
When ducted narrow-band VLF pulses pass through the Earth's magnetosphere, small frequency shifts of ∼1 Hz may be observed at the receiving site on the ground. Such shifts may be…Upper Proterozoic rift-related rocks in the Pensacola Mountains, Antarctica: Precursors to supercontinent breakup?
1 December, 1992
Sedimentological and structural studies in the Pensacola Mountains, Antarctica, suggest that upper Precambrian clastic sedimentary rocks of the Patuxent Formation and associated bimodal volcanic rocks formed in an intracontinental rift…Sedimentary basins on the east flank of the Antarctic Peninsula: proposed nomenclature
1 December, 1992
The first fossils from Antarctica were collected from Seymour Island in December 1892, during the voyage of the Jason under Captain C.A. Larsen. The Swedish South Polar Expedition of 1901–1903,…Read more on Sedimentary basins on the east flank of the Antarctic Peninsula: proposed nomenclature
Reproduction and larval growth of Harpagifer antarcticus Nybelin (Pisces, Notothenioidei)
1 December, 1992
The spiny plunder-fish, Harpagifer antarcticus, is a common shallow-water demersal species distributed along the southern limb of the Scotia Arc. A year round study was made of its reproductive biology…The sedimentary record of Antarctic climate change
1 November, 1992
Circum-Antarctic marine sediments contain a record of past climate and Southern Ocean circulation that both complements and considerably extends the record in the continental ice. Variations in primary biological production,…Read more on The sedimentary record of Antarctic climate change
Cretaceous fossil wood and palynomorphs from Williams Point, Livingston Island, Antarctic Peninsula
1 November, 1992
Terrestrial palynofloras from two localities on Williams Point, Livingston, Island, contain angiosperm monocolpates and tricolpates and can be dated as Cenomanian-early Campanian. This fixes the age for a collection of…The Southern Ocean Benthic Fauna and Climate Change: A Historical Perspective [and Discussion]
1 November, 1992 by Andrew Clarke, Alistair Crame
Environmental change is the norm and it is likely that, particularly on the geological timescale, the temperature regime experienced by marine organisms has never been stable. These temperature changes vary…Aspects of the biology of the midge, Eretmoptera murphyi Schaeffer (Diptera: Chironomidae), introduced to Signy Island, maritime Antarctic
1 November, 1992 by Peter Convey
The biology of a population of the subantarctic chironomid midge Eretmoptera murphyi Schaeffer, introduced to Signy Island in the maritime Antarctic more than 20 years ago, is described. Investment in…Southern Ocean environmental changes: effects on seabird, seal and whale populations
1 November, 1992
The main changes in the distribution and abundance of marine top predators in the Antarctic in the last two centuries were caused by hum an over-exploitation. Hypotheses that increases in…Read more on Southern Ocean environmental changes: effects on seabird, seal and whale populations
Factors causing the limitation of growth of terrestrial algae in maritime Antarctica during late summer
1 November, 1992
The factors causing the cessation of growth and decline of microalgal communities on Antarctic fell-field soils during late summer were investigated. Physical and chemical amendments were applied within small enclosures…Managing Southern Ocean krill and fish stocks in a changing environment
1 November, 1992
Management of Antarctic krill, Euphausia superba, and the mackerel icefish, Champsocephalus gunnari under the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) is discussed in relation to changes…Read more on Managing Southern Ocean krill and fish stocks in a changing environment
Rock weathering, soil development and colonization under a changing climate
1 November, 1992
Antarctic continental soils are arid, saline and lacking in organic matter, whereas maritime soils, in a wetter environment, range from structureless lithosols to frozen peat. Two important factors in the…Read more on Rock weathering, soil development and colonization under a changing climate
Mesozoic radiolarian faunas from the Antarctic Peninsula: age, tectonic and palaeoceanographic significance
1 November, 1992
New assemblages of Radiolaria, including some of the few occurrences of high southern latitude Jurassic and Cretaceous radiolarian faunas, show that several localities in the LeMay Group of Alexander Island…Marine molluscan constraints on the age of Cretaceous fossil forests of Alexander Island, Antarctica
1 November, 1992
New evidence, provided by bracketing marine molluscan faunas, suggests a Late Albian age for fossil forests in the upper part of the Fossil Bluff Group of Alexander Island. These in…An improved desorber design for use in couloximetry
1 November, 1992 by Lloyd Peck
A new desorber design for use in the couloximetric determination of oxygen in water samples is described. In comparison with previous systems it significantly improves the efficiency of transfer of…Read more on An improved desorber design for use in couloximetry
Antarctic Marine Primary Production, Biogeochemical Carbon Cycles and Climatic Change [and Discussion]
1 November, 1992
In the Southern Ocean, inorganic macronutrients are very rarely depleted by phytoplankton growth. This has led to speculation on possible additional CO2 drawdown in this region. However, the effects of…Trophic relations of the cephalopod Martialia hyadesi (Teuthoidea: Ommastrephidae) at the Antarctic Polar Front, Scotia Sea
1 November, 1992 by Paul Rodhouse
Samples of the squid Martialia hyadesi were collected aboard two Japanese squid-jigging vessels carrying out commercial fishing trials at the Antarctic Polar Frontal Zone, north Scotia Sea, in February 1989.…Seasonal lipid contents of Antarctic microarthropods
1 October, 1992 by Peter Convey
A technique for the accurate determination of lipid content of very small quantities of biological tissue was applied to two Antarctic oribatid mites,Alaskozetes antarcticus andHalozetes belgicae, and a collembolan,Cryptopygus antarcticus.…Read more on Seasonal lipid contents of Antarctic microarthropods
Use of VLF transmissions in the location and mapping of lightning-induced ionisation enhancements (LIEs)
1 October, 1992
Lightning-induced ionisation enhancements (LIEs) are usually produced by short (~ 1 s) bursts of energetic electrons precipitated from the radiation belts in the process of amplifying whistlers. During their short…Body volumes and internal space constraints in articulate brachiopods
1 October, 1992 by Lloyd Peck
Brachiopods were once dominant in all the oceans of the world. but their distributions are non more restricted. There are few species which are found in shallow warm habitats and…Read more on Body volumes and internal space constraints in articulate brachiopods
Effectiveness of various cattle ear tags as markers for Weddell seals
1 October, 1992
Methods for estimating tag loss and sightability of tags are presented. Rates of tag loss were estimated for metal and several varieties of plastic cattle ear tags in a long-term…Read more on Effectiveness of various cattle ear tags as markers for Weddell seals
Mapping the British Antarctic Territory using a 70 mm reconnaissance camera and satellite imagery
1 October, 1992
A technique for preparing simple, large scale maps of remote and poorly surveyed areas is described, whereby semicontrolled aerial photograph print laydowns are superimposed on enlarged satellite imagery.An assessment of the L shell fitting beam-swinging technique for measuring ionosphericEregion irregularity drift patterns
1 October, 1992 by Michael Pinnock
The majority of current ground‐based radar experiments measuring ionospheric convection flows derive the ionospheric flow vectors from line‐of‐sight (l‐o‐s) velocity measurements made from a single radar site. In order to…Feeding rates and diel vertical migration of copepods near South Georgia: a comparison of shelf and oceanic sites
1 September, 1992 by Peter Ward
Seventeen Longhurst Hardy Plankton Recorder profiles were taken over a diel cycle in January 1990 to study the feeding of four major copepods over the South Georgia shelf. Ontogenetic changes…Eocene microplankton from La Meseta Formation, northern Seymour Island
1 September, 1992
Twenty two samples collected from the Tertiary La Meseta Formation of Cape Wiman, Seymour Island, Antarctic Peninsula yielded abundant and moderately diverse assemblages of marine palynoflora, dominated by dinoflagellate cysts,…Read more on Eocene microplankton from La Meseta Formation, northern Seymour Island
Palynology of the James Ross Island area, Antarctic Peninsula
1 September, 1992
The James Ross Island area is recognized as one of the geological treasures of Antarctica. It exposes a section of 5–6 km of Cretaceous and Tertiary marine sedimentary strata with…Read more on Palynology of the James Ross Island area, Antarctic Peninsula
Palynology of the Marambio Group (Upper Cretaceous) of northern Humps Island
1 September, 1992
Palynological analyses of the Marambio Group sediments of Humps Island (Santa Marta and López de Bertodano formations) indicates that there is minor displacement across a prominent NW–SE trending normal fault…Read more on Palynology of the Marambio Group (Upper Cretaceous) of northern Humps Island
Late Pleistocene and Holocene glacial history of James Ross Island, Antarctic Peninsula
1 September, 1992
Studies of Quaternary glacial stratigraphy and morphology around the Antarctic Peninsula have shown that James Ross Island in the western Weddell Sea probably has the best occurrences of stratigraphic sections…Read more on Late Pleistocene and Holocene glacial history of James Ross Island, Antarctic Peninsula
Palynology of the Lachman Crags Member, Santa Marta Formation (Upper Cretaceous) of north-west James Ross Island
1 September, 1992
Palynomorph assemblages from the Lachman Crags Member of the Santa Marta Formation, north-west James Ross Island, Antarctic Peninsula are described. By basis of comparison with other Southern Hemisphere localities, particularly…The stratigraphical palynology of the Kotick Point and Whisky Bay formations, Gustav Group (Cretaceous), James Ross Island
1 September, 1992
Palynomorph assemblages are reported from the Kotick Point and Whisky Bay formations in west and north-west James Ross Island, Antarctic Peninsula. The microfloras, particularly the dinoflagellate cyst florules, indicate an…The ratio of MSA to non-sea-salt sulphate in Antarctic Peninsula ice cores
1 September, 1992 by Robert Mulvaney
Methane sulphonic acid (MSA) in an ice core from Dolleman Island (70°35′S, 60°56′W) shows significantly high concentrations (typically 1-2 µm, but up to 5 µm) compared to values recorded in…Read more on The ratio of MSA to non-sea-salt sulphate in Antarctic Peninsula ice cores
Jurassic–Tertiary stratigraphy and palynology of the James Ross Basin: review and introduction
1 September, 1992
A sedimentary sequence, c. 5–6 km thick, extending from the Kimmeridgian–Upper Eocene crops out in the James Ross Island area, northern Antarctic Peninsula. This succession is the most important onshore…Microplankton from the Cape Lamb Member, López de Bertodano Formation (Upper Cretaceous), Cape Lamb, Vega Island
1 September, 1992
Samples from the lower Cape Lamb Member, López de Bertodano Formation, Cape Lamb, Vega Island, Antarctic Peninsula have yielded rich and diverse marine palynofloral assemblages. The overall character of the…Dinoflagellate cysts from an allochthonous block of Nordenskjöld Formation (Upper Jurassic), north-west James Ross Island
1 September, 1992
An allochthonous block of the Nordenskjöld Formation from north-west James Ross Island, Antarctic Peninsula has yielded a diverse marine palynoflora. Dinoflagellate cyst assemblages from the 185 m thick sequence are…Diel vertical migration and feeding of copepods at an oceanic site near South Georgia
1 August, 1992 by Peter Ward
Twelve Longhurst Hardy Plankton Recorder (LHPR) profiles were taken over a 16 h period in January 1990, in order to study feeding of four copepod species at an Antarctic oceanic…Read more on Diel vertical migration and feeding of copepods at an oceanic site near South Georgia
The respiratory system of the femaleVarroa jacobsoni (Oudemans): its adaptations to a range of environmental conditions
1 August, 1992
The morphology of the respiratory system of the femaleVarroa jacobsoni (Oudemans, 1904) is described. The mobile, appendage-like, emergent peritreme may be ‘raised’ to lie against the ventral integument or ‘lowered’…The effect of maternal age and experience on egg-size and hatching success in Wandering Albatrosses Diomedea exulans
1 July, 1992
The roles of maternal age and experience, on the one hand, and individual, year and random effects on the other, in influencing avian egg-size and hatching success have been much…High-resolution diatom stratigraphy of Quaternary sediments from the Scotia Sea
1 July, 1992
Upper Quaternary pelagic and hemipelagic sediments from the Scotia Sea and South Scotia Ridge range from diatom ooze to diatom-bearing mud. Diatom content increases northwards, and at most sites diatom-rich…Read more on High-resolution diatom stratigraphy of Quaternary sediments from the Scotia Sea
The effect of resolution on high latitude cloud track winds produced from AVHRR imagery
1 July, 1992 by John Turner, Thomas Lachlan-Cope
Sequences of images from geostationary satellites have been used for some time to track clouds and so produce an estimate of the wind at cloud height (see/1/ and /2/). However,…Read more on The effect of resolution on high latitude cloud track winds produced from AVHRR imagery
Toward an optimum receiving array and pulse set for the Dynasonde
1 July, 1992
The accuracy and efficiency with which radio echo parameters may be estimated by a programmable ionosonde of high resolution depend upon software-designed strategies of pulse set design and receiving antenna…Read more on Toward an optimum receiving array and pulse set for the Dynasonde
A microbarograph for internal gravity wave studies in Antarctica
1 June, 1992
Measurement of pressure fluctuations provides the best means of detecting atmospheric internal gravity waves at the Earth's surface. We have developed an instrument which is sufficiently sensitive to detect the…Read more on A microbarograph for internal gravity wave studies in Antarctica
Glacier fluctuations on South Georgia during the 1970s and early 1980s
1 June, 1992
South Georgia is a highly glacierized island with a range of glacier types including corrie, valley and tidewater ice bodies. Glaciologically, it occupies a strategic location between South America and…Read more on Glacier fluctuations on South Georgia during the 1970s and early 1980s
Retention of precipitation nitrogen by Antarctic mosses, lichens and fellfield soils
1 June, 1992
Retention of mineral elements in precipitation by mosses and lichens involving ion exchange and chelation mechanisms is a source of nutrients for these biota growing on rocks and nutrient poor…Read more on Retention of precipitation nitrogen by Antarctic mosses, lichens and fellfield soils
Comparison of the cold hardiness of two larval Lepidoptera (Noctuidae)
1 June, 1992 by Roger Worland, William Block
Diapause larvae of the European corn borer (Ostrinia nubilalis (Hubn.)) and the related Mediterranean noctuid Sesamia cretica Led. possess sufficient supercooling ability to avoid freezing over their normal environmental temperature…Read more on Comparison of the cold hardiness of two larval Lepidoptera (Noctuidae)
Late quaternary changes in Antarctic bottom water velocity inferred from sediment grain size in the northern Weddell Sea
1 June, 1992
Newly formed bottom water (θ ≤ −0.7°C) in the northern Weddell Sea flows E or NE at speeds up to 10–15 cm/s, with velocity decreasing towards the centre of the…Diving pattern and performance in relation to foraging ecology in the gentoo penguin,Pygoscelis papua
1 June, 1992
We present data on diving pattern and performance (dive depth, duration, frequency and organization during the foraging trip) in gentoo penguins Pygoscelis papua, obtained using time-depth recorders (n= 9 birds,…Acanthocephalan infection of inshore fish in two fjords at South Georgia
1 June, 1992
An examination of 111 fish of eight species, including 92 immature Notothenia rossii Richardson revealed nine acanthocephalan species, including four Echinorhynchida occurring in the alimentary tract and five Polymorphida in…Read more on Acanthocephalan infection of inshore fish in two fjords at South Georgia
The reproductive strategies of two Antarctic rotifers
1 May, 1992
The bdelloid rotifers Philodina gregaria Murray and Adineta grandis Murray were both cultured through three generations. The results suggested the following models for calculation purposes: (1) that individual Adineta grandis…Read more on The reproductive strategies of two Antarctic rotifers
Production of soma and gonad in maturing female Illex argentinus (Mollusca: Cephalopoda)
1 May, 1992 by Paul Rodhouse
Samples of male Illex argentinus were taken from the catch of a Japanese squid jigging vessel on the Patagonian Shelf during March 1986 and an analysis was carried out on…Production of soma and gonad in maturing male Illex argentinus (Mollusca: Cephalopoda)
1 May, 1992 by Paul Rodhouse
Samples of male Illex argentinus were taken from the catch of a Japanese squid jigging vessel on the Patagonian Shelf during March 1986 and an analysis was carried out on…Read more on Production of soma and gonad in maturing male Illex argentinus (Mollusca: Cephalopoda)
Fine structure of a terrestrial cyanobacterial mat from Antarctica
1 April, 1992
The fine structure of a cyanobacterial mat collected from the fellfield ecosystems of Signy Island, Antarctica, was examined using some novel light and scanning electron microscope techniques. The mat was…Read more on Fine structure of a terrestrial cyanobacterial mat from Antarctica
Reproductive biology of caridean decapods from the Weddell Sea
1 April, 1992 by Andrew Clarke
Data on reproductive biology are presented for five benthic caridean shrimps from the high Antarctic (Chorismus antarcticus, Notocrangon antarcticus, Nematocarcinus lanceopes, Lebbeus antarcticus and Eualus kinzeri). The first three species…Read more on Reproductive biology of caridean decapods from the Weddell Sea
The diet of antarctic squid: comparison of conventional and serological gut contents analyses
1 April, 1992
The alimentary tracts of 12 species of Antarctic squid were examined visually and serologically for the presence of Euphausia superba. Only four species, Alluroteuthis antarcticus, Galiteuthis glacialis, Martialia hyadesi and…Magmatism and tectonics in continental Chiloé, Chile (42°–42°30′S)
1 April, 1992
The Chiloé-Chonos region seems to preserve the oldest depositional events in the fore-arc accretionary complex of the Southeast Pacific margin. There are isolated occurrences of low-grade metamorphic rocks, including slates…Read more on Magmatism and tectonics in continental Chiloé, Chile (42°–42°30′S)
A revised age for the granites of the central Somuncura Batholith, North Patagonian Massif
1 April, 1992
The age of the granites of the La Esperanza region of the Somuncura Batholith, North Patagonian Massif has been revised, based in part on RbSr whole-rock data obtained by reanalyzing…Bimodal magmatism in northeast Palmer Land, Antarctic Peninsula: Geochemical evidence for a Jurassic ensialic back-arc basin
1 April, 1992
Major- and trace-element (XRF and INAA) and Nd-isotope analyses are presented on a Jurassic bimodal association of basic greenstones and silicic metavolcanic rocks from the Black Coast, northeast Palmer Land,…Long-term population studies of seabirds
1 April, 1992
Long-term studies of seabirds, some now 30–40 years old, have begun to reveal significant age-related changes in the survival and reproduction o f these long-lived animals. Evidence for density-dependent regulation…Precipitation nitrogen at maritime Signy Island and continental Cape Bird, Antarctica
1 March, 1992
The mineral nitrogen (NH4-N + NO3-N) in precipitation occurring at continental and maritime Antarctic sites has been determined. Precipitation at sites remote from animal activity contained much less mineral N…Read more on Precipitation nitrogen at maritime Signy Island and continental Cape Bird, Antarctica
An additional record of a placental mammal (Order Astrapotheria) from the Eocene of West Antarctica
1 March, 1992
Recently, fossil land mammals have been recorded in the James Ross Island area, east of the Antarctic Peninsula, from the marine middle-late Eocene strata of Seymour Island. These include two…Changes in seabird species abundance near South Georgia during a period of rapid change in sea surface temperature
1 March, 1992
During a three month research cruise near the island of South Georgia, sea surface temperature (SST) increased from c. 2°C to over 4°C. Satellite derived SST show that this corresponded…Ion-cyclotron waves at Jupiter: Possibility of detection by Ulysses
1 March, 1992 by Richard Horne
We evaluate the convective growth of ion-cyclotron waves in the Io plasma torus using realistic plasma parameters. Significant wave amplification is restricted to two dominant frequency bands. As originally proposed…Read more on Ion-cyclotron waves at Jupiter: Possibility of detection by Ulysses
Satellite tracking of wandering albatrosses (Diomedea exulans) in the South Atlantic
1 March, 1992
The movements of two wandering albatrosses, one of each sex, breeding at South Georgia, were tracked using satellite telemetry, particularly to assess whether such birds could be at risk from…Read more on Satellite tracking of wandering albatrosses (Diomedea exulans) in the South Atlantic
Polar lows and arctic instability lows in the Bear Island region
1 March, 1992 by John Turner
The study of the “polar low episode” over the northern parts of the Norwegian Sea and the Barents Sea from 12 December 1982 to 16 December 1982 is continued. The…Read more on Polar lows and arctic instability lows in the Bear Island region
Preconcentration method for electrothermal atomic absorption spectrometric analysis for heavy metals in Antarctic snow at sub ng kg−1 levels
1 March, 1992 by Eric Wolff
An improved technique for concentrating heavy metals onto the surface of tungsten wires, prior to analysis by electrothermal atomic absorption spectrometry, is reported. Ultraclean methods and materials, described here, have…A comparison of satellite sounding data and aircraft measurements within a mature polar low
1 March, 1992 by John Turner, Thomas Lachlan-Cope
The value of satellite temperature sounding data in polar lows research is investigated through a comparison of satellite temperature profiles produced using radiances from the TIROS Operational Vertical Sounder (TOVS)…Preliminary field observations on peperites and hydrothermal veins and breccias on Livingston Island, South Shetland Islands
1 March, 1992
Sulphide-bearing quartz veins were first observed on Hurd Peninsula, Livingston Island, at Henry Bluff in 1958 (Hobbs 1968). Subsequent mapping of the host Miers Bluff Formation (MBF) in western Hurd…Digenean Trematoda infection of inshore fish at South Georgia
1 March, 1992
A sample of 111 fish of eight species caught in two fjords at South Georgia were examined for digenean trematode parasites. The alimentary tracts of all specimens were infected with…Read more on Digenean Trematoda infection of inshore fish at South Georgia
A case study of plasma structure in the dusk sector associated with enhanced magnetospheric convection
1 February, 1992
In a case study from June 8–9, 1982, data from ground whistler stations Siple and Halley, Antarctica, located at L ∼4.3 and spaced by ∼2 hours in MLT, and from…Proximate and elemental composition of gelatinous zooplankton from the Southern Ocean
1 February, 1992 by Andrew Clarke
We have analysed the proximate composition and elemental (C,H,N) composition of eight gelatinous zooplankton from the Southern Ocean (two ctenophores, one anthomedusan, two siphonophorcs, one scyphozoan, one annelid and one…Read more on Proximate and elemental composition of gelatinous zooplankton from the Southern Ocean
Diving behavior and energetics during foraging cycles in king penguins
1 February, 1992
King Penguins are the second largest of all diving birds and share with their congener, Emperor Penguins, breeding habits strikingly different from other penguins. Our purpose was to determine the…Read more on Diving behavior and energetics during foraging cycles in king penguins
The chemical basis for the electrical stratigraphy of ice
1 February, 1992 by Eric Wolff
Antarctic and Greenland ice core samples were studied using two different stratigraphic electrical techniques. The electrical conductivity measurement (ECM) technique is a dc method, while dielectric profiling (DEP) is an…Read more on The chemical basis for the electrical stratigraphy of ice
An assessment of the biological and acoustic characteristics of swarms of Antarctic krill
1 February, 1992 by Jonathan Watkins
Measurements on krill from distinct swarms and echo-sounder measurements of the same swarms have been analysed using multivariate methods. The analysis has addressed the problems of whether krill swarms in…Fluorine and boron geochemistry of an ensialic marginal basin volcano: Deception Island, Bransfield Strait, Antarctica
1 February, 1992
We present the initial results of a quantitative investigation of the volatile geochemistry of Deception Island, an active volcano situated near the spreading axis of a Quaternary ensialic marginal basin…Reproductive endocrinology of macaroni (Eudyptes chrysolophus) and gentoo (Pygoscelis papua) penguins: I. Seasonal changes in plasma level of gonadal steroids and LH in breeding adults
1 February, 1992
Changes in plasma luteinizing hormone (LH), testosterone, oestradiol, and progesterone were measured throughout the breeding and molt cycle in free-living male and female macaroni (Eudyptes chrysolophus) and gentoo (Pygoscelis papua)…Reproductive endocrinology of macaroni (Eudyptes chrysolophus) and gentoo (Pygoscelis papua) penguins: II. Plasma levels of gonadal steroids and LH in immature birds in relation to deferred sexual maturity
1 February, 1992
Plasma levels of LH, testosterone, estradiol, and progesterone were measured, during the breeding season, in adult and immature macaroni (Eudyptes chrysolophus) and gentoo (Pygoscelis papua) penguins, at Bird Island, South…Aging live Antarctic fur seals and southern elephant seals
1 January, 1992
This study describes a method for extracting post-canine or incisor teeth from live antarctic fur seals (Arctocephalus gazella) and southern elephant seals (Mirounga leonina) respectively and their use to determine…Read more on Aging live Antarctic fur seals and southern elephant seals