Showing 13487 items
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…1 January, 1977
The Larsen Harbour Formation of southern South Georgia is part of an ophiolite sequence of submarine lavas and sheeted dykes emplaced into metasedimentary country rocks. The metasediments are remnants of…Read more on The occurrence of Mesozoic oceanic floor and ancient continental crust on South Georgia
1 January, 1977
The bibliography lists 166 references on the paleontology of Lesser Antarctica and the Scotia Ridge. It aims to identify all the paleontological discoveries made and to list all the major…Read more on An annotated bibliography of the paleontology of Lesser Antarctica and the Scotia Ridge
1 January, 1977
We have found fossil angiosperm leaves more than 1,000 km further south than any other previously reported. Specimens were obtained in situ by R. W. B. from tuffs in a…1 January, 1977
Analysis of wind-speed measurements made over a six-month period on an Antarctic glacier showed that conditions near the surface were dominated by gravity winds flowing downhill. In such conditions there…1 January, 1976
A summary is given of comparative work carried out within the I.B.P. Tundra Biome at an Arctic station (Greenland) and a sub-Antarctic station (South Georgia). The investigations covered many aspects…1 January, 1976
(1) Six annual agricultural species were grown in summer at South Georgia (54⚬S) and in the winter-spring growing season at Melbourne (38⚬S). (2) The mean daily air temperature at South…Read more on Development and growth of some agricultural species on a subantarctic island
1 January, 1976 by William Block
Oxygen consumption rates of the minute terrestrial mite, Nanorchestes antarcticus Strandtmann were measured at +5°C with a Cartesian Diver microrespirometer. Individual respiration rates were in the range 0.156 (deutonymphy) to…Read more on Oxygen uptake by Nanorchestes antarcticus (Acari)