Is magnetospheric line radiation man-made?
Magnetospheric line radiation (MLR) events are relatively narrowband VLF signals (∼30 Hz) that sometimes drift in frequency and that have been observed in both ground-based and satellite data sets. We […]
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Read more of: Is magnetospheric line radiation man-made?
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Some comments on transient and steady-state reconnection at the dayside magnetopause
Read more of: Some comments on transient and steady-state reconnection at the dayside magnetopauseReconnection at the dayside magnetopause is the principal method by which energy is transferred from the solar wind into the magnetosphere-ionosphere system. There is still considerable uncertainty as to whether […]
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Ionospheric research 50 years ago, today and tomorrow
Read more of: Ionospheric research 50 years ago, today and tomorrowFifty years ago the processes responsible for the formation of the ionospheric layers were well established, Appleton, Bartels and Chapman having been in the vanguard of the exploration phase of […]
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Ground-based imaging of magnetospheric boundaries
Read more of: Ground-based imaging of magnetospheric boundariesThe ionosphere provides an excellent window on magnetospheric and solar wind processes. Often discrete magnetospheric boundaries are imaged in the ionosphere. These boundaries can be detected by a variety of […]
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FAST observations of ULF waves injected into the magnetosphere by means of modulated RF heating of the auroral electrojet
Read more of: FAST observations of ULF waves injected into the magnetosphere by means of modulated RF heating of the auroral electrojetResults are reported from an experiment in which the HF high power facility at Tromsø was utilised to inject artificial ULF waves into the magnetosphere by means of modulated heating […]
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Stratification and dynamics of microbial loop communities in Lake Fryxell, Antarctica
Read more of: Stratification and dynamics of microbial loop communities in Lake Fryxell, Antarctica1. Lake Fryxell, situated in the McMurdo Dry Valleys, Antarctica, offers the opportunity to study microbial loop processes in the absence of crustacean zooplankton and other higher organisms. This is the […]
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A simple model of the convective internal boundary layer and its application to surface heat flux estimates within polynyas
Read more of: A simple model of the convective internal boundary layer and its application to surface heat flux estimates within polynyasA simple model of the convective (thermal) internal boundary layer has been developed for climatological studies of air-sea-ice interaction, where in situ observations are scarce and first-order estimates of surface […]
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Fly or die: the role of fat stores in the growth and development of Grey-headed Albatross Diomedea chrysostoma chicks
Read more of: Fly or die: the role of fat stores in the growth and development of Grey-headed Albatross Diomedea chrysostoma chicksChicks of albatrosses, like other Procellariiformes, become independent at a mass similar to their parents but during growth attain a peak mass some 30% or more greater, before losing mass […]
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An initial examination of relationships between the distribution of whales and Antarctic krill Euphausia superba at South Georgia
Read more of: An initial examination of relationships between the distribution of whales and Antarctic krill Euphausia superba at South GeorgiaThe distribution of whales and krill in two survey boxes north of South Georgia was examined by comparing sightings and underway acoustic data collected as part of a multi-disciplinary research […]
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Frost flowers as a source of fractionated sea salt aerosol in the polar regions
Read more of: Frost flowers as a source of fractionated sea salt aerosol in the polar regionsFrost flowers collected from the surface of new sea ice near the Brunt Ice Shelf, Antarctica, show depletion in sulphate and sodium relative to other sea water ions. This is […]
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Ammonium and potassium in snow around an emperor penguin colony
Read more of: Ammonium and potassium in snow around an emperor penguin colonySnow samples taken at various distances from the emperor penguin (Aptenodytes forsteri) colony near Halley station were analysed by ion chromatography. Extremely high ammonium concentrations were encountered at the colony […]
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Quasi-steady, marginally unstable electron cyclotron harmonic wave amplitudes
Read more of: Quasi-steady, marginally unstable electron cyclotron harmonic wave amplitudesElectron cyclotron harmonic (ECH) waves have long been considered a potential driver of diffuse aurora in Earth’s magnetotail. However, the scarcity of intense ECH emissions in the outer magnetotail suggests […]