4645 to 4656 of 13838 results
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Spread-F ionospheric irregularities and their relationship to stable auroral red arcs at magnetic mid-latitudes
Read more of: Spread-F ionospheric irregularities and their relationship to stable auroral red arcs at magnetic mid-latitudesThe signature of the stable auroral red arc (SAR arc) as it appears on ionograms is described. The key features are a very significant increase in the amount of spread-F […]
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Estimation by use of field weighings of metabolic rate and food conversion efficiency in albatross chicks
Read more of: Estimation by use of field weighings of metabolic rate and food conversion efficiency in albatross chicksA knowledge of the assimilation of food and of the energetic demands of chicks at different stages in the growth period can provide a basis for understanding growth strategies of […]
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Automated measurement of meal sizes and feeding frequency in albatrosses
Read more of: Automated measurement of meal sizes and feeding frequency in albatrossesAn artificial nest incorporating an automated weighing device, suitable for chick growth studies on some species of seabirds, is described. (2) The operating weight range is 1-7 kg, with an […]
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Activity budgets of foraging gray-headed albatrosses
Read more of: Activity budgets of foraging gray-headed albatrossesActivity recorders were attached to 13 Gray-headed Albatrosses (Diomedea chrysostoma) rearing chicks at South Georgia in February 1982. During foraging trips to sea totalling 284 bird-days, an average of 74% […]
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Accelerating flow of the Brunt Ice Shelf, Antarctica
Read more of: Accelerating flow of the Brunt Ice Shelf, AntarcticaPosition fixes made at the British Antarctic Survey station, Halley, on the Brunt Ice Shelf are considered for the period 1968–82. These show an initial westward velocity of approximately 400 […]
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Electrical resistivity of ice from the Antarctic Peninsula, Antarctica
Read more of: Electrical resistivity of ice from the Antarctic Peninsula, AntarcticaGeoresistivity soundings have been carried out at four sites in the Antarctic Peninsula. The objective of the work was to investigate the electrical behaviour of ice from an area where […]
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Glaciological and oceanographic calculations of the mass balance and oxygen isotope ratio of a melting ice shelf
Read more of: Glaciological and oceanographic calculations of the mass balance and oxygen isotope ratio of a melting ice shelfGlaciological estimates of the ice supply to George VI Ice Shelf are obtained by integrating the accumulation over the catchment. The basal melt (or possible shelf thickening) rates for the […]
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Scaling of foraging radius and growth rate in petrels and albatrosses (Procellariiformes)
Read more of: Scaling of foraging radius and growth rate in petrels and albatrosses (Procellariiformes)Data are assembled from a number of sources on several species of Procellariiformes breeding on South Georgia, covering the amount, frequency and energetic content of feeds brought to the young, […]
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Isotopic tracers in polar seas and glacier ice
Read more of: Isotopic tracers in polar seas and glacier iceThe relationship between isotope concentration and salinity provides important evidence on the origin of water masses. In polar regions it can be used to deduce the isotopic composition of melting […]