Publications

5665 to 5676 of 13906 results

1. Quiet daytime Arctic ionospheric D region

   Phase and amplitude measurements of VLF radio waves propagating sub‐ionospherically on long paths across the Arctic are used to determine the high latitude, daytime D region height and sharpness of […]

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2. An updated model providing long-term data sets of energetic electron precipitation, including zonal dependence

   In this study 30‐ to 1,000‐keV energetic electron precipitation (EEP) data from low Earth orbiting National Oceanic and Atmospheric Administration and MetOp Polar Orbiting Environmental Satellites were processed in two […]

   Read more of: An updated model providing long-term data sets of energetic electron precipitation, including zonal dependence

3. Report of the first meeting of the SCAR Group of Specialists on Environmental Affairs and Conservation, British Antarctic Survey, Cambridge, U.K., 11-14 September 1989

   Read more of: Report of the first meeting of the SCAR Group of Specialists on Environmental Affairs and Conservation, British Antarctic Survey, Cambridge, U.K., 11-14 September 1989

4. New crushed rock airstrip on Antarctic Peninsula

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5. British Antarctic Survey biological survey of the James Ross Island area, January-February 1989

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6. Report on the BIOTAS Workshop, British Antarctic Survey, Cambridge, 27-29 September 1989 – background and proceedings

   Read more of: Report on the BIOTAS Workshop, British Antarctic Survey, Cambridge, 27-29 September 1989 – background and proceedings

7. Average diurnal and seasonal profiles of ionospheric storms

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8. Geomagnetic modification of the mid-latitude ionosphere: Toward a strategy for the improved forecasting of ƒ0F2

   The reduction of maximum usable frequency (MUF) during a geomagnetic storm represents a serious hindrance to the efficient operation of HF transmission links. This paper outlines a new approach to […]

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9. Diffusion and location of hydrochloric acid in ice: Implications for polar stratospheric clouds and ozone depletion

   We have carried out experiments to study the incorporation and movement of HCl within the structure of ice. These involved freezing HCl solutions, and observing them in a scanning electron […]

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10. Aggression, incubation behaviour and egg-loss in macaroni penguins, Eudyptes chrysolophus, at South Georgia

    In crested penguins Eudyptes spp., the first-laid (A) egg is very much smaller than the second (B) egg and, although viable, rarely survives to hatching. I tested the recent hypothesis […]

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11. The UK contribution to observations of Comet Halley

    The work of organizations in the UK to observe Comet Halley is reviewed. The activities of the Comet Halley UK Coordinating Committee are discussed. Results from space probes are summarized, […]

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12. Late Jurassic—Early Cretaceous strike-slip deformation in the Nordenskjöld Formation of Graham Land

    Upper Jurassic–Lower Cretaceous anoxic mudstones and air-fall ashes of the Nordenskjöld Formation are exposed on the eastern coast of Graham Land. Deformation of the strata has a long history spanning […]

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