Found 14089 items
1 January, 1978
A major rockfall occurred near the summit of Paulsen Peak (1877 m) and initiated a slide of rock, firn, and ice debris 4 km down the Lyell Glacier, South Georgia,…Read more on A major rockfall and debris slide on the Lyell Glacier, South Georgia
1 January, 1978
The concentrations and distributions of alkanes have been determined in samples of sediment, fish, benthos and a land plant mixture from King Edward Cove, South Georgia. The fish muscle and…1 January, 1978
Temperatures from 10 m bore holes have been analysed to determine the spatial variation of mean annual surface temperature over the Antarctic Peninsula. In general there is a decrease in…Read more on The Spatial Distribution of 10 m Temperatures in the Antarctic Peninsula
1 January, 1978 by Andrew Clarke
Following growth under sub-optimal concentrations of nutrients, cells ofChlorella emersonii accumulated lipid and became more resistant to the damage caused by freezing and thawing. These results suggest that the factor…1 January, 1978
Remnants of Early Archaean rocks (>FX3000 m.y. old) are reported from most continents. A critical review of the radiometric data shows that few of these are well authenticated and most…Read more on Early Archaean rocks and geochemical evolution of the earth’s crust
1 January, 1978
Full chemical analyses, including some trace elements and both oxygen and strontium isotope abundance data are presented for samples collected from a traverse across the outcrop of the early Tertiary…1 January, 1978
The population of Antarctic Fur seals Arctocephalus gazella at South Georgia is increasing rapidly and is therefore of great interest. Investigations of the population depend on two main techniques. (1)…Read more on Population size and age determination in the Antarctic fur seal Arctocephalus gazella
1 January, 1978
Quantative population data for shallow Antarctic soft-bottom communities in King Edward Cove, South Georgia indicate that although once grossly polluted by organic effluent and fuel oil from a whaling station,…1 January, 1978
Two species of aquatic moss (Calliergon sarmentosum and Drepanocladus sp.) occur in deep water in Moss Lake, Signy Island (60° 43′S, 45° 38′W). Their elongate stems support a structurally complex…Read more on The biology of an Antarctic aquatic moss community
1 January, 1978
Stresses occur in the uppermost 10 m of a glacier as a result of temperature fluctuations at the surface. A model is set up of a typical year's surface temperature…1 January, 1978
Philine gibba is redescribed using large samples collected from the original type locality (South Georgia, South Atlantic). The specimens examined are compatible with all but one previous description which differs…1 January, 1978
(1) The source and availability of nutrients to the predominantly non-vascular cryptogam vegetation of Signy Island. South Orkney Islands, in the maritime Antarctic, are briefly discussed. (2) The concentrations of…1 January, 1977
Geological field work in Antarctica and the off-lying islands during the past two decades has contributed materially to the establishment of the stratigraphical succession in both East and West Antarctica.…1 January, 1977
In the absence of identified magnetic anomalies in the southernmost Atlantic and Indian Oceans, palaeomagnetic data provide the most precise test of the initial relative positions of East and West…Read more on Towards a more certain reconstruction of Gondwanaland
1 January, 1977
The occurence of propagating wave-like disturbances in the atmosphere at ionospheric heights is well documented, but their causes and role in the energy balance of the atmosphere is poorly understood.…Read more on Radio wave doppler studies of the Antarctic ionosphere
1 January, 1977
For several years marine biologists of British Antarctic Survey have been studying the nearshore communities at Signy Island and South Georgia. Most of these studies have been continued throughout the…Read more on Antarctic marine secondary production and the phenomenon of cold adaptation
1 January, 1977
Ozone measurements have been made regularly at Argentine Islands and Halley Bay since 1957. A recent critical review of the data revealed inconsistencies in the extraterrestrial constants adopted for the…Read more on Ozone measurements at British Antarctic Survey stations
1 January, 1977
A review is presented of studies, including recent work by members of the British Antarctic Survey, on the primary productivity of plankton, ice-flora and benthos in both marine and freshwater…1 January, 1977
The ice-free area around Ablation Point (70° 49' S, 68° 25' W) is of particular limnological interest. Numerous ponds and pools lie on coastal moraines and large, permanently ice-covered lakes…Read more on A limnological survey of the Ablation Point area, Alexander Island, Antarctica
1 January, 1977
The composition of the terrestrial Antarctic flora and fauna and the distribution patterns of a number of species and of the principal vegetation types is now reasonably well established, at…1 January, 1977
Observations of natural electromagnetic phenomena, embracing frequencies ranging from millihertz to tens of kilohertz, have made a major contribution to our knowledge of the terrestrial environment extending out to many…Read more on Very low frequency electromagnetic phenomena: ‘whistlers’ and micropulsations
1 January, 1977
There are fewer species of marine mammals in the Antarctic than in the Arctic, probably because of the wide deep ocean with no geographical barriers to promote speciation. The stocks…1 January, 1977
The Antarctic fur seal Arctocephalus gazella is a polygynous Otarid in which a single pup is produced annually by cows over the age of 2 years. Following exploitation to the…1 January, 1977
A prime objective of atmospheric science research in Antarctica is to use the special conditions found there to throw new light on global problems and, in particular, to test theories…Read more on The importance of the Antarctic in atmospheric sciences
1 January, 1977
The Antarctic Peninsula is a good place for studies that take advantage of its wide range of latitude. Other worthwhile investigations are those that set in context the glacier/climate relationships…Read more on Glaciological research in the Antarctic Peninsula
1 January, 1977
The stratigraphical limits on the age of the Freetown intrusion, Sierra Leone, are very wide, yet the intrusion has not previously been accurately dated by isotopic methods, despite a number…1 January, 1977
During storage of the collembolan Cryptopygus antarcticus Willem at +5°C over 387 d, both respiration and metabolic rates of size class V and IV individuals declined significantly. For pooled data…1 January, 1977 by William Block
Analysis of 148 measurements of individual respiration rate showed that although respiration was linearly related to live weight on a double log10 scale, there were significant differences between rates at…1 January, 1977
A new genus and two new species are described and compared with related algae. All were isolated from terrestrial habitats on Signy Island, South Orkney Islands, Antarctica. They are Signiosphaera…1 January, 1977 by Andrew Clarke
Since 1971, four peregrine falcons, Falco peregrinus, coated with an oil‐like contamination, have been received for analysis at Monks Wood Experimental Station. All were from north or west Scotland. The…Read more on Contamination of Peregrine falcons (Falco peregrinus) with fulmar stomach oil
1 January, 1977 by Andrew Clarke
The major lipids of the Antarctic benthic hippolytid prawn Chorismus antarcticus (Pfeffer) were phospholipid and triacylglycerol. There were small amounts of free sterol and alkyldiacylglycerol and traces of free fatty…1 January, 1977 by Andrew Clarke
The Antarctic benthic prawn Chorismus antarcticus (Pfeffer) was sampled regularly for a year and its total lipid content measured. Immature and transitional prawns had very variable lipid contents but similar…1 January, 1977
The present geographical position of the Ellsworth Mountains is geologically anomalous on account of their stratigraphy, which does not relate to western Antarctica, their structural trend, approximately perpendicular to the…Read more on Age and position of the Ellsworth Mountains crustal fragment, Antarctica
1 January, 1977
ICE ages and reversals of the Earth's magnetic field are two widely different geophysical phenomena; but they may be casually linked by the following mechanism. The moment of inertia of…Read more on A possible effect of ice ages on the Earth’s magnetic field
1 January, 1977
Elsevier Earth and Planetary Science Letters Volume 36, Issue 2, September 1977, Pages 253-262 Earth and Planetary Science Letters A geochemical study of island-arc and back-arc tholeiites from the Scotia…Read more on A geochemical study of island-arc and back-arc tholeiites from the Scotia Sea
1 January, 1977
Sediment samples taken at depths from 5 to 50 m in Borge Bay, Signy Island, Antarctica yielded purple (Chromatiaceae) and green (Chlorobiaceae) phototrophic bacteria when inoculated into Winogradsky columns or…1 January, 1977
Previous studies on fish Mg2+Ca2+ activated myofibrillar ATPases have been extended to species inhabiting diverse thermal environments. Cold adapted ATPases have considerably higher catalytic centred activities at low temperatures than…1 January, 1977
Studies have been carried out on the Mg2+ Ca2+-myofibrillar ATPase from the muscles of fish adapted to different environmental temperatures. The thermal stability of the ATPase is strongly correlated with…1 January, 1977
Six main British Antarctic Survey stations were occupied throughout the year. Of these, Adelaide air base on Adelaide Island was closed down at the end of the summer, as it…1 January, 1977 by Andrew Clarke
Following a shift from autotrophic to heterotrophic nutrition, cells of Chlorella protothecoides become sensitive to the stresses of freezing and thawing. The injury then observed at slow rates of cooling…1 January, 1977
O'HARA1 has recently proposed an open-system model for the fractional crystallisation of magmas involving continual replenishment of the magma chamber and only partial extraction of the fractionated liquid at each…Read more on Open system crystal fractionation and incompatible element variation in basalts
1 January, 1977
Following current interpretation of isotope data from oceanic basalts, the case for inheritance of Rb/Sr and 87Sr/86Sr ratios in continental igneous rocks from long-lived heterogeneities in the mantle is reviewed,…Read more on Strontium isotope evidence for mantle events in the continental lithosphere
1 January, 1977
The growth of two Antarctic lamellibranchs, Adamussium colbecki (E.A. Smith) and Laternula elliptica (King and Broderip), has been investigated. A. colbecki is a pectinid that grows to a shell height…Read more on Growth of two Antarctic lamellibranchs: Adamussium colbecki and Laternula elliptica
1 January, 1977
An analysis is made of the disturbance in conductive heat flow caused by drilling a bore hole in ice in which there is a vertical temperature gradient. The model used…