Found 14035 items
1 January, 1992
We studied the distributions, abundances and interactions of macaroni penguins Eudyptes chrysolophus, Antarchc fur seals Arctocephalus gazella, and their zooplankton prey, m particular Antarctic krill Euphausia superba, near Bird Island,…1 January, 1992
References Citations Metrics Reprints & Permissions PDF Abstract The beaks of 9,994 cephalopods of 61 species, obtained mainly from chick regurgitations of wandering albatrosses (Diomedea exulans L.)…1 January, 1992 by Adrian Jenkins
We calculate the present ice budget for Antarctica from measurements of accumulation minus iceberg calving, run-off and in situ melting beneath the floating ice shelves. The resulting negative mass balance…Read more on Melting of ice shelves and the mass balance of Antarctica
1 January, 1992 by Lloyd Peck
This chapter describes the biology of living brachiopods. The Brachiopoda are significant components of the early Cambrian marine Faunas and are therefore one of the few phyla to be represented…1 January, 1992 by Philip Leat
A two-day meeting of the Tectonic Studies Group was held in London at the Geological Society on 3-4 October 1991, to consider relationships between continental extension, super continent break-up, magmatism…Read more on Magmatism and the causes of continental break-up
1 January, 1992 by Thomas Lachlan-Cope
Atmospheric temperature retrievals obtained by a simultaneous physical scheme and a statistical scheme are compared using data gathered over the Weddell Sea, Antarctica during January 1986. Ground truth data were…1 January, 1992
During the lactation period, female otariid seals alternate trips at sea to feed with visits ashore to nurse their pups. A female returning ashore must be able to recognize her…Read more on Fostering behaviour and milk stealing in Antarctic fur seals
1 January, 1992 by Jane Francis
Cretaceous sediments in the Antarctic have yielded diverse fossil floras, and a few occurrences of thin coal have been described. Their presence illustrates that the climate was favorable for plant…Read more on The potential for Cretaceous coal in Antarctica
1 January, 1992 by Robert Mulvaney
The east coast of the Antarctic Peninsula is strongly influenced by air masses that have traversed the Weddell Sea zone. A continuous record of annual-average values for δ18O, δD, Cl−…1 January, 1992 by Eric Wolff, Robert Mulvaney
Antarctic snow and ice contain very low concentrations of ions,Read more on The distribution of impurities in Antarctic ice
1 January, 1992
The transcurrent Gastre Fault System in central Patagonia, which is closely associated with subvolcanic granite emplacement, is recognized as a major dextral shear-zone and geological boundary. We propose its equivalence…1 January, 1992
F-layer ionisation troughs are frequently observed in the sub-auroral and high-latitude ionospheres. We define the mid-latitude trough as the region of low plasma concentration at F-region altitudes that occurs near…1 January, 1992 by Eric Wolff, Robert Mulvaney
A technique, using Nuclepore polycarbonate membrane filters as a containing medium for very small volumes of ionic standard solutions, to produce homogeneous ice standards is described. The standards are suitable…Read more on Preparation of aqueous standards for low temperature x-ray microanalysis
1 January, 1992
A mathematical model of the ionosphere and plasmasphere that includes an eccentric dipole geomagnetic field has been constructed to model, in the first instance, whistler results at L = 2.5.…Read more on Seasonal and longitudinal effects on plasmaspheric tube content
1 January, 1992 by Paul Rodhouse
In the austral summers of 1986 and 1988–1989, 51 southern elephant seals (Mirounga leonina) at Husvik, South Georgia (54°10′S; 36°43′W), were stomach lavaged after chemical immobilization. Only cephalopod remains were…Read more on Cephalopod prey of the southern elephant seal, Mirounga leonina L.
1 January, 1992 by Paul Rodhouse
Cephalopod paralarvae and juveniles were sampled with RMT8 and Bongo nets during 2 cruises of the MV 'Falklands Protector' in the southwest Atlantic Ocean in October/November 1990 and 1991. Each…1 January, 1992
Simultaneous ground-based observations of narrowband and broadband VLF radio waves and of cloud-to-ground lightning were made at widely spaced locations during the 1987 Wave-Induced Particle Precipitation (WIPP) campaign, conducted from…1 January, 1992 by Howard Roscoe
The measurement of N2O5 by Evans [Appl. Opt. 25, 1866–1868 (1986)] contains several serious errors. A reanalysis of the published infrared spectra gives the more realistic error bar of ±45%.Read more on Observation of the 8-μm N2O5 thermal emission feature in the stratosphere: comment
1 January, 1992 by Howard Roscoe
In a new program which performs a Backus-Gilbert analysis of the output kernels from the input kernels of any hypothetical remote sensor, Conrath's method for calculating trade-off curves has been…1 January, 1992 by Mark Clilverd
The group delay times (tg) of whistler-mode waves generated by the NAA (f= 24.0 kHz) and NSS (f = 21.4 kHz) U.S. Navy transmitters and recorded at Faraday, Antarctica (L=…1 January, 1992
A combination of geochemical and field investigations of the Ballantrae Complex allows some control on the relative timing of events in its tectono-magmatic history. In particular, the presence of boninitic…1 January, 1992
In the West Antarctic sector of Gondwana, early stages of break-up are associated with the large Antarctic-Karoo-Tasman basalt province. Formation of this within-plate province was synchronous with active margin tectonics…1 January, 1992
Palynomorph assemblages dominated by dinoflagellate cysts are described from seventeen samples from the Rabot Member of the Santa Marta Formation at Ekelöf Point, eastern James Ross Island, Antarctic Peninsula. Although…1 January, 1992 by Eric Wolff
Cadmium, copper, lead and zinc concentrations have been measured on a sequence of snow blocks covering 2 years’ accumulation at a site on the east coast of the Antarctic Peninsula.…Read more on Seasonal input of heavy metals to Antarctic snow
1 January, 1992
References Citations Metrics Reprints & Permissions Get access The standard of Antarctic maps in many of the world atlases on sale in the UK is reviewed and the…1 January, 1992 by Richard Horne
The excitation of SAR arcs requires the transfer of energy from the energetic storm-time ring current ions to tonal electrons located just inside the plasmapause. A recent observational study has…1 January, 1992
The LeMay Group of Alexander Island, Antarctic Peninsula, is a Mesozoic accretionary prism that was constructed during subduction of Pacific and proto-Pacific oceanic crust. In central Alexander Island, several distinct…1 January, 1992 by John Turner
An atmospheric transmittance model has been applied to Antarctic radiosonde ascents in order to examine the high-latitude normalized weighting functions (NWF) of the water vapour channels on the High Resolution…Read more on High-latitude moisture structure determined from HIRS water vapour imagery
1 January, 1992
Igneous rocks exposed in the southern Heritage Range include two diabasic sills (100 m and 300 m thick), three gabbroic stocks (outcrop areas each1 January, 1992 by Jonathan Watkins
Length, sex and maturity stage of Antarctic krill Euphausia superba Dana occurring in discrete swarms were measured. Over a 14 d period 38 swarms were sampled in a small area…1 January, 1992
Syenogranites and monzogranites of Edward VII Peninsula, Marie Byrd Land, represent magmatism associated with continental rifting and the separation of New Zealand from W Antarctica in the mid-Cretaceous. These coarse-grained,…1 January, 1992
1. Plasma concentrations of urea, uric acid and total lipid were compared in pre- and late-fast breeding and moulting macaroni penguins (Eudyptes chrysolophus) to test the hypothesis that birds exhaust…Read more on Breeding and moulting fasts in macaroni penguins: Do birds exhaust their fat reserves?
1 January, 1992
Annual variation in return rate of breeding birds, mate and nest-site fidelity was studied in the resident Gentoo (Pygoscelis papua) and migratory Macaroni (Eudyptes chrysolophus) Penguin from 1986 to 1990…1 January, 1992
We studied diving patterns and performance (dive depth, duration, frequency and organization during the foraging trip) in relation to diet in nonbreeding Gentoo Penguins (Pygoscelis papua) over 59 days (involving…1 January, 1992 by Eric Wolff
The Antarctic ice sheet is the main sink for atmospheric pollution reaching the Antarctic atmosphere from other continents. The ice preserves a historical record of the atmosphere that can be…1 January, 1992
Thirty samples from two sections on south-western Humps Island, James Ross Basin, northern Antarctic Peninsula, contain moderately diverse dinoflagellate cyst assemblages deposited in shallow shelf, open marine conditions. Assemblages contain…Read more on Dinoflagellate cysts from the Marambio Group (Upper Cretaceous) of Humps Island
1 January, 1992 by Roger Worland, William Block
The ability of adults and larvae of two species of perimylopid beetles (Hydromedion sparsutum, Perimylops antarcticus) to survive sub-zero temperatures was studied at Husvik, South Georgia in summer during October–December…