Found 14046 items
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…1 October, 1988
The fish diet (45% of total diet by weight) of Wandering Albatrosses rearing chicks at South Georgia during the austral winters of 1983 and 1984 was investigated using otoliths retrieved…Read more on Fish prey of the Wandering Albatross Diomedea exulans at South Georgia
1 October, 1988 by William Block
(1) Field predation by the mite Gamasellus racovitzai (GA) on three other species of micro-arthropods was determined using polyacrylamide gel electrophoresis (PAGE). Attack rates were derived and prey selection examined…Read more on Arthropod predation in an Antarctic terrestrial community
1 October, 1988
An occupational health unit has been established by British Antarctic Survey (BAS) which utilises the philosophy and principles employed to provide health care for offshore workers on the UK continental…Read more on Remote health care for Antarctica: the BAS medical unit
1 October, 1988 by Andrew Wood, Peter Ward
Fourteen species of the genus Euchaeta (Copepoda: Calanoida) were encountered during two cruises undertaken around South Georgia during November–December 1981 (Summer) and July–August 1983 (Winter). All 14 species were present…Read more on The distribution of the Euchaetidae (Copepoda: Calanoida) around South Georgia
1 September, 1988
ODP Leg 113 drilled 22 holes at 9 sites in the Weddell Sea, to investigate the Cenozoic development of the modern cold, circum-Antarctic water mass structure and the continental glaciation.…Read more on Weddell sea palaeoceanography: Preliminary results of ODP Leg 113
1 September, 1988 by Alistair Crame
As a result of recent field work, the 4000m thick Kimmeridgian-Albian Fossil Bluff Formation of eastern Alexander Island is elevated to Group status (Fossil Bluff Group). Four formations are recognised…1 September, 1988
At South Georgia, the diet of Wilson's storm petrel was studied using the regurgitates of adults arriving to feed chicks. Feeding frequency and meal size were estimated by weighing chicks…Read more on Food and feeding ecology of Wilson’s storm petrel Oceanites oceanicusat South Georgia
1 September, 1988
The entirely cryptogamic vegetation of Bailey and Clark Peninsulas, Windmill Islands, Budd Coast, Wilkes Land, Antarctica, is described for the first time. The vegetation of this area is exceptionally well…1 August, 1988
The form and development of the vertical distribution of ozone are examined during the Antarctic winter and spring by comparing profiles selected from a series of balloon‐borne ozonesonde ascents which…Read more on Comparative morphology of the vertical ozone profile in the Antarctic spring
1 July, 1988
Zooplankton was sampled with RMT (1+8) gear on a synoptic grid of stations centred on South Georgia during the austral summer (November/December 1981) and winter (July/August 1983). This initial paper…Read more on A summer-winter comparison of zooplankton in the oceanic area Around South Georgia
1 July, 1988 by Andrew Clarke
The time course of faecal pellet production (egestion) was monitored in January 1985 for a population of Antarctic krill, Euphausia superba Dana, maintained in flowing seawater aquaria at Palmer Station,…1 July, 1988
Place names in the Hughes Bay area, Danco Coast, Antarctica well illustrate naming problems that give rise to confusion or ambiguity. This note shows the origins of conflicting place names,…Read more on Confusion of place names; an example from Antarctica
1 July, 1988
The filamentous chlorophyte Spirogyra forms a mat covering extensive areas of Spirogyra Lake, a small, shallow, Antarctic lake. It has an annual growth pattern, with a maximum standing crop of…Read more on The seasonal dynamics of Spirogyra in a shallow, maritime Antarctic lake
1 July, 1988
Pc3–4 magnetic pulsations have been observed at Halley, Antarctica (L = 4.2), simultaneously with oscillations in the phase of F-region echoes received using a digital ionosonde. One event, lasting more…Read more on Digital ionosonde observations of Pc3–4 pulsations across the plasmapause