Found 13633 items
1 May, 1988
Intraspecific allometry of pup mass as a function of maternal mass was analysed in Antarctic fur seals (Arctocephalus gazella), a highly dimorphic species. The allometric exponent was 0.6, much lower…1 April, 1988
The basal melting of George VI Ice Shelf into the unusually warm underlying water represents a major oceanographic feature in the waters off the west coast of the Antarctic Peninsula.…Read more on Oceanic regimes at the ice fronts of George VI Sound, Antarctic Peninsula
1 April, 1988
During the Worldwide Atmospheric Gravity-wave Study (WAGS) in October 1985, the EISCAT incoherent scatter radar was used to observe the generation of atmospheric gravity waves in the auroral zone in…1 April, 1988
Plasma densities obtained from EISCAT's UHF incoherent scatter system are compared with profiles inverted from the digital ionograms of a co-located dynasonde. Excellent agreement is found for the bottomside ionosphere…1 March, 1988
Many stormpetrel species breed in habitats where their populations cannot be estimated by direct counts of burrows or birds; mark-recapture experiments have been confounded by the presence of many wandering…1 March, 1988
Amos Lake is a shallow, permanently cold, maritime Antarctic lake which is almost totally anoxic for much of the 9 month period of winter ice cover each year. The lake…1 March, 1988
The elephant seal population of South Georgia was surveyed comprehensively during the 1985 breeding season. 87711 females and 10260 adult males were counted. The counts were corrected using a model…1 February, 1988 by William Block
1. Microarthropods (Acari and Collembola) are dominant components of the terrestrial fauna in the Antarctic. Their cold tolerance, which forms the mainspring of their adaptational strategy, is reviewed against a…1 February, 1988
1983 receptions of subionospheric signals radiated from Siple, Antarctica (L = 4.3) to neighboring stations Palmer (L = 2.3), Halley (L = 4.3), and South Pole (Λ = 74°), each…Read more on The Siple VLF transmitter as a multi-frequency probe of the Earth-ionosphere waveguide
1 February, 1988
The Larsen Basin, on the northwest margin of the Weddell Sea, formed as a Mesozoic ensialic basin during Gondwana breakup. Deposition was either in half grabens on the extending Weddell…Read more on A preliminary assessment of the hydrocarbon potential of the Larsen Basin, Antarctica
1 January, 1988 by Peter Ward
Reprinted from Hydrobiologia Vol. 176-168Read more on Summer-winter differences in copepod distribution around South Georgia
1 January, 1988
Joides-Resolution visited the Weddell Sea from January 5 to March 11, 1987. Twenty-two holes were drilled at nine sites, and allowed us: (1) to find the evidence of strong cooling…1 January, 1988
Magnetic and bathymetric data from the South American-Antarctic plate boundary east of the South Sandwich trench have been interpreted to produce ocean floor ages, spreading rates and directions. SAM-ANT motion…1 January, 1988 by Andrew Clarke
1. The Southern Ocean is characterized by the combination of a low but stable temperature with a markedly seasonal pattern of primary production. It therefore offers an environment where the…Read more on Seasonality in the antarctic marine environment
1 January, 1988
The depthsa ttainedo n 1,444d ivesb y 14 GentooP enguins(P ygosceliPs apua) and 6,352d ivesb y eightM acaroniP enguins(E udyptesc hrysolophusw)e re recordedt,o gether with the timing and durationo f…Read more on Diving patterns in relation to diet of Gentoo and Macaroni penguins at South Georgia
1 January, 1988
The protobranch bivalve mollusc Yoldia eightsi Courthouy is both a deposit feeder (on mud) and a suspension feeder (on diatoms in the ventilatory streams, which are trapped on the ctenidia).…Read more on The feeding mechanism of Yoldia (= Aequiyoldia) eightsi (Courthouy)
1 January, 1988
A case study of the behaviour of the poleward edge of the main F-region trough in the premidnight sector associated with a substorm is presented. It is found that the…Read more on Ionospheric signature of plasma sheet thinning prior to a substorm
1 January, 1988
The resting metabolic rates (RMR) of 6 men was determined monthly for 12 consecutive months, at Rothera Base, Antarctica (67°34′S, 68°07′W). Body weight and body composition were also recorded. Metabolic…Read more on Variations in resting metabolic rates of men in Antarctica
1 January, 1988
1. The energy metabolism of Antarctic fish muscles is discussed in relation to environmental temperature and the fishes' locomotory habits. 2. The predominant body form in terms of body shape…1 January, 1988
1. The kinetics of lactate dehydrogenase (both forward and back reaction) in cardiac and skeletal muscle of an Antarctic teleost have been compared with a temperate teleost of comparable morphology…Read more on Lactate dehydrogenases in antarctic and temperate fish species
1 January, 1988
Survey data from three transverse profiles across Rutford Ice Stream show that most of the shear deformation occurs in boundary layers about 10 km wide on both sides of the…Read more on Relative importance of lateral and vertical shear on Rutford Ice Stream, Antarctica
1 January, 1988
1. Studies of serum 25-hydroxy-vitamin D (25-OHD) in the Antarctic have been undertaken in husky dog, seal and penguin and compared to man. 2. Husky dogs showed a reversal of…1 January, 1988
Results of freeze‐thaw simulations on three large blocks of quartz‐micaschist are presented. Three types of water to ice phase change were identified from temperature and ultrasonic measurements. It is suggested…1 January, 1988
Most of the exploited fish stocks in the North Sea are also used as a food supply by a number of seal species; the same is true for some fish…1 January, 1988
The Southern Coastal Batholith of central Chile is mainly composed of calc-alkaline granitoids of Late Carboniferous to Permian age. There is no clear evidence of the existence of older plutonic…Read more on Granitoids of the Coast Range of central Chile: Geochronology and geologic setting
1 January, 1988
Following the cessation of subduction along the Antarctic Peninsula, there was a change in the character of the magmatism from calc-alkaline to alkaline. A Miocene-Pliocene suite of basanites, tephrites and…Read more on Post-subduction alkaline volcanism along the Antarctic Peninsula
1 January, 1988
Broadband Jovian radio emission in the kilometric wavelength range (bKOM) observed by the Voyagers 1 and 2 (V1 and V2) planetary radioastronomy, PRA, experiments have been analysed for the period…Read more on Analysis of Jovian kilometric radiation simultaneously observed by voyagers 1 and 2
1 January, 1988
Antarctic wood-boring bivalves are described from the Kotick Point Formation, Gustav Group (Early Cretaceous) and the Marambio Group (Late Cretaceous) of the James Ross Island group, and from the Early…1 January, 1988 by Ed King
Marine geophysical studies of the South Orkney microcontinent show two intersecting tectonic fabrics of different age. The older fabric is oriented E-W, and represents the magmatic arc and fore-arc created…1 January, 1988
A steep reverse fault at Engel Peaks, Antarctic Peninsula, cuts granophyre and overlying volcanic rocks and incorporates a lower angle zone or ‘fault step’. The reverse fault step differs from…Read more on Reverse fault step at Engel Peaks, Antarctic Peninsula
1 January, 1988
A 130 m long ice core has been dielectrically profiled. From an analysis of the measurements, we obtain a profile of the high-frequency (radio-echo) conductivity. This profile has been represented…Read more on Dielectric variability of a 130 m Antarctic ice core: implications for radar sounding
1 January, 1988 by Robert Mulvaney
High-resolution anion profiles of Cl-, NO3- and SO4 2− are presented for two cores from the Antarctic Peninsula. A 47.2 m core from a site on the Palmer Land plateau…1 January, 1988 by Eric Wolff, Robert Mulvaney
It has been suggested1,2 that acids in the cold polar ice sheets may exist as aqueous mixtures at grain boundaries. This assumption can correctly predict the d.c. conductivity of polar…Read more on Sulphuric acid at grain boundaries in Antarctic ice
1 January, 1988
Carboniferous, igneous, and metamorphic rocks, followed by Jurassic, Cretaceous, and particularly extensive Miocene granitoid plutons, crop out in the Andes of the Lake Region, as determined by new K-Ar and…Read more on Geochronology of the Lake Region of south-central Chile (39°–42°S): Preliminary results
1 January, 1988
New field and laboratory studies result in a redefinition of the three main lithostratigraphic units of the Thiel Mountains. These are (1) the Thiel Mountains porphyry, a massive hypersthene-bearing monzonite,…1 January, 1988
Mesozoic and Cenozoic granitoids of this segment of the Andes occur in three N/S-trending belts: western (WB), central (CB), and eastern (EB). The WB is formed by the Mincha and…1 January, 1988
Hobbs Pool is an area of thin ice shelf situated within George VI Ice Shelf, Antarctica. Thicker ice shelf surrounding Hobbs Pool isolates the upper 155 m of the water…Read more on Localized basal freezing within George VI Ice Shelf, Antarctica
1 January, 1988 by Robert Mulvaney
Whilst stable-isotope analysis of ice cores yields the best quantitative evidence for past climate, there remains considerable uncertainty about the detailed relationship between the isotopic composition and air temperature. Analysis…