Showing 13455 items
1 January, 1989
An intensive net sampling survey was conducted around the island of South Georgia during November/December 1981. The distribution and copepodite stage structure of the dominant copepods Calanoides acutus, Calanus simillimus,…Read more on Distribution of six major copepod species around South Georgia in early summer
1 January, 1989
A high mortality rate occurs in Antarctic fur seal males on the breeding beaches of Bird Island, South Georgia. The main causes of death were infections of fighting wounds and…1 January, 1989
Environmental impact assessment (EIA) is generally recognized as a useful tool in reducing human impacts on the environment. The Antarctic environment is especially sensitive to harmful perturbation. Regulations introduced under…1 January, 1989 by Eric Wolff
Investigators have used the temporal record of heavy metal and sulphur concentrations in Antarctic snow to assess the extent of global atmospheric pollution in the Southern Hemisphere. These studies would…Read more on Heavy metal and sulphur emissions to the atmosphere from human activities in Antarctica
1 January, 1989
Relationships between size, body condition, age and feeding-attendance patterns during pup rearing of female Antacrtic fur seals Arctocephalus gazella and their effects on the timing of birth and weaning, pup…1 January, 1989 by Andrew Clarke, Alistair Crame
Current knowledge of the break-up of Gondwana during the Tertiary indicates that shallow water marine habitats may have been present continuously, and on occasions were considerably more extensive than at…1 January, 1989 by Alistair Crame
Within the last 25 years there has been a dramatic increase in our knowledge of the fossil record of Antarctica. Improved access to the remotest parts of the continent, the…Read more on Origins and evolution of the Antarctic biota: an introduction
1 January, 1989 by Alistair Crame
In the late Jurassic, the belemnite genera Hibolithes and Belemnopsis were abundant and widespread in Tethys, characterizing a Tethyan Realm that extended south from southern Europe and Asia to Antarctica…Read more on Antarctic belemnite biogeography and the break-up of Gondwana
1 January, 1989 by Andrew Clarke, Paul Rodhouse
Juvenile cuttlefish Sepia offcinalis were hatched and reared in the laboratory at six ration levels and two temperatures. At 12.5 °C there was little growth whereas at 17.5 °C growth…1 January, 1989
In August–September 1987 a group of geophysicists, led by M. Ander of the Los Alamos National Laboratory and M. Zumberge of Scripps Institution of Oceanography, performed a geophysical experiment to…Read more on Investigating variations in the gravitational constant
1 January, 1989 by Lloyd Peck
Ash-free-dry-weight determinations for a representative range of living brachiopod genera have revealed that a consistently high proportion of total organic mass is contained within the shell, partly as the organic…Read more on Physiological constraints on living and fossil brachiopods
1 January, 1989
Glaciological measurements from Austfonna on Nordaustlandet, Svalbard, are needed as a prerequisite to mathematical modelling of ice-mass dynamics. Several upper and lower boundary conditions are set out in detail for…1 January, 1989 by David Vaughan
Results from movement surveys on Rutford Ice Stream are presented with complementary surface-elevation and ice-thickness measurements. Surface velocities of 300 m a−1 occur at least 130 km up-stream of the…Read more on Flow of Rutford Ice Stream and comparison with Carlson Inlet, Antarctica
1 January, 1989 by Richard Horne
It is generally accepted that electrostatic wave energy is the source of terrestrial myriametric radiation (TMR), but there are several theories to suggest how this energy is converted into TMR.…1 January, 1989 by Robert Larter
Multichannel seismic profiles across the Pacific margin of the Antarctic Peninsula show a series of oblique progradational sequences. These sequences exhibit a variety of unusual characteristics that suggest they were…1 January, 1989
Introduced mammals have had a major impact on the biota of islands in the Southern Ocean. Management plans for some islands include control measures for both introduced herbivores and carnivores…Read more on Introduced reindeer on South Georgia—A management dilemma
1 January, 1989
As part of the Winter Weddell Sea Project 1986 (WWSP 86), a buoy, transmitting via TIROS-N satellites to Service Argos, was inserted into an ice floe in the southern Weddell…1 January, 1989
A general method for testing the stability of a stratified, parallel shear flow is presented. The technique allows the routine determination of unstable modes from any high resolution radiosonde data…Read more on A general method for the linear stability analysis of stratified shear flows
1 January, 1989
The structural basement of Alexander Island consists of a wide belt of accretionary complex rocks, the LeMay Group (Bum 1984). This is overlain by ?Cretaceous-Tertiary calcalkalinevolcanic rocks (Bum 1981), and…1 January, 1989
The effect of an evolutionary adaptation to low environmental temperature on the development of lymphoid organs was examined in Harpagifer antarcticus from Signy Island (South Orkney Islands; 60° 43′S, 45°…1 January, 1989 by Lloyd Peck
Tissue ash-free dry mass (AFDM) was investigated in relation to animal size (length) and season in Liothyrella uva (Broderip, 1833). Brachiopods were divided into digestive gland, gonads, lophophore, other internal…1 January, 1989 by Lloyd Peck
Oxygen consumption and ammonia excretion rates were assessed for Terebratulina retusa (L.) held under 3 different regimes of temperature and food availability. These were: 5.6ˆC, no food (cold, starved); 5.8ˆC,…1 January, 1989
The centric diatom Coscinodiscus bouvet Karsten is a distinctive Antaretic endemic species whose distribution can be assessed reliably from a large body of literature. It appears to be typically neritic,…1 January, 1989 by Paul Rodhouse
In the Antarctic there are large unexploited stocks of cephalopods with high potential commercial value and there are two important fisheries for squid in the cool temperate waters of the…Read more on Antarctic cephalopods: a living marine resource?
1 January, 1989
Position data from an Argos-tracked buoy deployed in the southern Weddell Sea in the austral summer of 1986 are analysed to determine important time-scales of variation of sea-ice motion in…1 January, 1989
Solar-terrestrial physics is concerned with the near-Earth space environment, that is with the solar wind, magnetosphere, ionosphere and thermosphere. It deals with this region, now often termed geospace, in both…1 January, 1989 by Andy Smith, Ed King
The results of trials to investigate the forces required to tow cables and small sledges on Antarctic snow are discussed. Once moving, cables which were straight and towed at a…Read more on An investigation into the forces required to tow cables and sledges over Antarctic snow
1 January, 1989 by John Turner
A new method is described for obtaining information on the high latitude upper level wind field through the production of cloud motion vectors from sequences of images from polar orbiting…Read more on Cloud track winds in the polar regions from sequences of AVHRR images
1 January, 1989
Ice motion in the Weddell Sea is examined for the period 19 August (Day 232) to 12 October (Day 286) 1986 using the tracks of four Argos buoys deployed during…Read more on Basin-scale ice motion and deformation in the Weddell Sea during winter
1 January, 1989 by Peter Ward
Zooplankton was sampled intensively with an RMT 1+8M system in the fjord of Cumberland East Bay, South Georgia during late winter 1983 and summer 1987. In summer, biomass was highest…1 January, 1989
Data from the 37 μm channel of the Advanced Very High Resolution Radiometer (AVHRR) are contaminated by interference which appears in the images as a herring-bone pattern. This interference has…Read more on AVHRR channel-3 noise and methods for its removal
1 January, 1989
The Nordenskjöld Formation is a sequence of thinly interbedded ash beds and black, radiolarian-rich mudstones which is exposed on the eastern coast of the Antarctic Peninsula. As a result of…1 January, 1989 by Jonathan Shanklin
The work of organizations in the UK to observe Comet Halley is reviewed. The activities of the Comet Halley UK Coordinating Committee are discussed. Results from space probes are summarized,…Read more on The UK contribution to observations of Comet Halley
1 January, 1989
The reduction of maximum usable frequency (MUF) during a geomagnetic storm represents a serious hindrance to the efficient operation of HF transmission links. This paper outlines a new approach to…1 December, 1988
The distribution and ultrastructure of muscle-fibre types has been investigated in adult and juvenile specimens of the pelagic high-antarctic silverfish Pleuragramma antarcticum Boulenger, 1902 collected from the South Shetland Islands…1 November, 1988
Over 12000 km of new aeromagnetic data, gathered during periods free from auroral disturbances, are presented for an area of 290 000 km2 in West Antarctica, including the majority of…1 November, 1988
Plasma wave measurements from the DE 1 (Dynamics Explorer 1) spacecraft are used to determine the polarization of an escaping terrestrial continuum radiation event that occurred on March 2, 1982.…Read more on The polarization of escaping terrestrial continuum radiation
1 November, 1988
A detailed vitrinite reflectivity study has been made through the Cretaceous sedimentary rocks of northwest James Ross Island, Antarctica. The results show that a progressive increase in reflectivity does not…